A NEW POLYMER COMPOSITION, POWER CABLE INSULATION AND POWER CABLE

The present invention relates to a polymer composition comprising a polyolefin, peroxide and a sulphur containing antioxidant, wherein said peroxide is present in an amount which corresponds to X mmol -0-0-/kg polymer composition and said sulphur containing antioxidant is present in an amount which corresponds to Y mmol —OH/kg polymer composition, wherein Y≦Y≦Y, X≦45 and 0.9*Y+m≦X≦n−k*Y, wherein Yis 0.50 and Yis 10, and m is 0.8, n is 70 and k is 4.7; and wherein said polymer composition has a melt flow rate (MFR) which is at least 1.7, and said polymer composition comprises less than 0.05% by weight (wt %) 2,4-Diphenyl-4-methyl-1-pentene; a crosslinked polymer composition, and use thereof, a power cable insulation, a power cable, useful in high voltage (HV DC) and extra high voltage (EHV DC) direct current applications, and a method for reducing electrical conductivity of a crosslinked polymer composition. 1. A polymer composition comprising a polyolefin , peroxide and a sulphur containing antioxidant , wherein said peroxide is present in an amount which corresponds to X mmol —O—O—/kg polymer composition and said sulphur containing antioxidant is present in an amount which corresponds to Y mmol —OH/kg polymer composition , wherein{'sub': 1', '2, 'claim-text': {'br': None, 'i': 'Y+m≦X≦n−k*Y,', '0.9*'}, 'Y≦Y≦Y, X≦45 and'}wherein{'sub': 1', '2, 'Yis 0.50 and Yis 10, and'}m is 0.8, n is 70 and k is 4.7; andwherein said polymer composition has a melt flow rate (MFR) which is at least 1.7, andsaid polymer composition comprises less than 0.05% by weight (wt %) 2,4-Diphenyl-4-methyl-1-pentene.2. A polymer composition according to claim 1 , wherein{'sub': 1', '2, 'X≦35, Yis 2.0 and Yis 8.0, and'}m is 3.0, n is 65 and k is 4.7.3. A polymer composition according to any of to claim 1 , wherein Yis 2 and Yis 6.5.4. A polymer composition according to any of to claim 1 , wherein said polymer composition comprises less than 0.03 wt % 2 claim 1 ,4-Diphenyl-4-methyl-1-pentene.5. A ...

A NEW LOW MFR POLYMER COMPOSITION, POWER CABLE INSULATION AND POWER CABLE

The present invention relates to a polymer composition comprising a polyolefin, peroxide and a sulphur containing antioxidant, wherein said peroxide is present in an amount which corresponds to X mmol —O—O—/kg polymer composition and said sulphur containing antioxidant is present in an amount which corresponds to Y mmol —OH/kg polymer composition, wherein Y 1 ≦Y≦Y 2 , X≦45 and 0.9*Y+m≦X≦n−k*Y, wherein Y 1 is 0.50 and Y 2 is 10, and m is 0.8, n is 70 and k is 4.7; and wherein said polymer composition has a melt flow rate (MFR) of less than 1.7, and said polymer composition comprises less than 0.05% by weight (wt %) 2,4-Diphenyl-4-methyl-1-pentene; a crosslinked polymer composition, and use thereof, a power cable insulation, a power cable, useful in high voltage (HV DC) and extra high voltage (EHV DC) direct current applications, and a method for reducing electrical conductivity of a crosslinked polymer composition.

A NEW CROSSLINKED LOW MFR POLYMER COMPOSITION, POWER CABLE INSULATION AND POWER CABLE

The present invention relates to a crosslinked polymer composition, which is obtained by crosslinking a polymer composition, which polymer composition has a melt flow rate (MFR) of less than 1.7 and comprises a polyolefm, peroxide and sulphur containing antioxidant, characterised by that the crosslinked polymer composition has an Oxidation Induction Time, determined according to ASTM-D3895, ISO/CD 11357 and EN 728 using a Differential Scanning Calorimeter (DSC), which Oxidation Induction Time corresponds to Z minutes, and comprises an amount of peroxide by-products which corresponds to W ppm determined according to BTM2222 using HPLC, wherein Z≦Z≦Z, W≦W≦W, and W≦p−270*Z, wherein Zis 0, Zis 60, Wis 0 and Wis 9500, and p is 18500; and use thereof, a power cable insulation and a power cable, useful in high voltage (HV) and extra high voltage (EHV) cable applications direct current (DC) applications. 1. A crosslinked polymer composition , which is obtained by crosslinking a polymer composition , which polymer composition has a melt flow rate (MFR) of less than 1.7 and comprises a polyolefin , peroxide and sulphur containing antioxidant , characterised by that the crosslinked polymer composition has an Oxidation Induction Time , determined according to ASTM-D3895 , ISO/CD 11357 and EN 728 using a Differential Scanning Calorimeter (DSC) , which Oxidation Induction Time corresponds to Z minutes , and comprises an amount of peroxide by-products which corresponds to W ppm determined according to BTM2222 using HPLC , wherein{'sub': 1', '2', '1', '2, 'Z≦Z≦Z, W≦W≦W, and'}W≦p−270*Z, wherein{'sub': 1', '2', '1', '2, 'Zis 0, Zis 60, Wis 0 and Wis 9500, and p is 18500.'}2. A crosslinked polymer composition according to claim 1 , wherein{'sub': 1', '2', '2, 'Zis 2, Zis 20, Wis 9000, and p is 16000.'}3. A crosslinked polymer composition according to any of to claim 1 , wherein the crosslinked polymer composition is obtained by crosslinking a polymer composition comprising polyolefin ...

Crosslinkable polymer composition and cable with advantageous electrical properties

The invention relates to a polymer composition with improved DC electrical properties and to a cable surrounded by at least one layer comprising the polymer composition.

Polymer composition for w&c application with advantageous electrical properties

The invention relates to a polymer composition with improved DC electrical properties, to the use of the composition for producing a cable layer and to a cable surrounded by at least one layer comprising the polymer composition.

NEW CROSSLINKED POLYMER COMPOSITION, POWER CABLE INSULATION AND POWER CABLE

The present invention relates to a crosslinked polymer composition, which is obtained by crosslinking a polymer composition, which polymer composition has a melt flow rate (MFR) of at least 1.7 and comprises a polyolefin, peroxide and sulphur containing antioxidant, characterised by that the crosslinked polymer composition has an Oxidation Induction Time, determined according to ASTM-D3895, ISO/CD 11357 and EN 728 using a Differential Scanning Calorimeter (DSC), which Oxidation Induction Time corresponds to Z minutes, and comprises an amount of peroxide by-products which corresponds to W ppm determined according to BTM2222 using HPLC, wherein Z≦Z≦Z, W≦W≦W, and W≦p−270*Z, wherein Zis 0 , Zis 60, Wis 0 and Wis 9500, and p is 18500; and use thereof, a power cable insulation and a power cable, useful in high voltage (HV) and extra high voltage (EHV) cable applications direct current (DC) applications. 1. A crosslinked polymer composition , which is obtained by crosslinking a polymer composition , which polymer composition has a melt flow rate (MFR) of at least 1.7 and comprises a polyolefin , peroxide and sulphur containing antioxidant , characterised by that the crosslinked polymer composition has an Oxidation Induction Time , determined according to ASTM-D3895 , ISO/CD 11357 and EN 728 using a Differential Scanning Calorimeter (DSC) , which Oxidation Induction Time corresponds to Z minutes , and comprises an amount of peroxide by-products which corresponds to W ppm determined according to BTM2222 using HPLC , wherein{'sub': 1', '2', '1', '2, 'Z≦Z≦Z, W≦W≦W, and'}W≦p−270*Z, wherein{'sub': 1', '2', '1', '2, 'Zis 0, Zis 60, Wis 0 and Wis 9500, and p is 18500.'}2. A crosslinked polymer composition according to claim 1 , wherein{'sub': 1', '2', '2, 'Zis 2, Zis 20, Wis 9000, and p is 16000.'}3. A crosslinked polymer composition according to any of to claim 1 , wherein the crosslinked polymer composition is obtained by crosslinking a polymer composition comprising polyolefin ...

POLYOLEFIN COMPOSITION FOR MEDIUM/HIGH/EXTRA HIGH VOLTAGE CABLES COMPRISING BENZIL-TYPE VOLTAGE STABILISER

The present invention relates to a polyolefin composition comprising (A) a polyolefin, (B) a benzil derivative comprising, preferably consisting of, the structural unit according to the following formula (I) wherein R, R, R, R, R, R, R, R, Rand Rindependently from each other are hydrogen, or a hydrocarbyl group which may contain heteroatoms or at least two of said R, R, R, R, R, R, R, R, Rand Rtogether with the ring atoms of the ring system of formula (I) they are attached to, form a further aromatic or non-aromatic ring fused to the ring system of formula (I) and at least Ror Ris an ester group. The invention also relates to a wire or cable, in particular a medium, high or extra high voltage cable, comprising such a composition, and to the use of such a composition for the production of a wire or cable, in particular a medium, high or extra high voltage cable. 2. The polyolefin composition according to wherein Rand Rare both ester groups.3. The polyolefin composition according to wherein Rand Rare the same ester group.4. The polyolefin composition according to wherein the ester group is selected from the group consisting of CHCO— claim 1 , CHCO— claim 1 , CHCO— claim 1 , CHCO— claim 1 , CHCO— claim 1 , CHCO— claim 1 , CHCO— claim 1 , COHCO— claim 1 , CHCO— claim 1 , CHCO— and CHCO—.5. The polyolefin composition according to wherein R claim 1 , R claim 1 , R claim 1 , R claim 1 , R claim 1 , R claim 1 , Rand Rare hydrogen.6. The polyolefin composition according to wherein at least one of R claim 2 , R claim 2 , R claim 2 , R claim 2 , R claim 2 , R claim 2 , Rand Ris an alkyl group or at least two of said R claim 2 , R claim 2 , R claim 2 , R claim 2 , R claim 2 , R claim 2 , Rand Rtogether with the ring atoms of the ring system of formula (I) they are attached to claim 2 , form a further aromatic ring fused to the ring system of formula (I) claim 2 , and the remaining of R claim 2 , R claim 2 , R claim 2 , R claim 2 , R claim 2 , R claim 2 , Rand Rare hydrogen.7. ...

A NEW CROSSLINKED POLYMER COMPOSITION, STRUCTURED LAYER AND CABLE

The present invention relates to a crosslinked polymer composition comprising a crosslinked polyolefin, wherein the polymer composition comprises, prior to crosslinking, a polyolefin and peroxide which is in an amount of less than 35 mmol —O—O-/kg polymer composition, characterized in that the crosslinked polymer composition has been in a direct contact with a semiconductive composition for 24 h at 70° C., and that the crosslinked polymer composition thereafter has an electrical DC-conductivity of 150 fS/m or less, wherein the electrical DC-conductivity is measured in accordance with “DC conductivity method”, as described under “Determination methods”, on a plaque of the crosslinked polymer composition at 70° C. and 30 kV/mm mean electric field from a non-degassed and 1 mm thick plaque sample of the crosslinked polymer composition; a layered structure, cable, e.g. a power cable, use of the crosslinked polymer composition and the structured layer, both, for producing a crosslinked power cable, e.g., a cross linked direct current (DC) power cable; and a process for producing a cable. 1. A crosslinked polymer composition comprising a crosslinked polyolefin , wherein the polymer composition comprises , prior to crosslinking , a polyolefin and peroxide which is in an amount of less than 35 mmol —O—O-/kg polymer composition , characterized in that the crosslinked polymer composition has been in a direct contact with a semiconductive composition for 24 h at 70° C. , and that the crosslinked polymer composition thereafter has an electrical DC-conductivity of 150 fS/m or less , wherein the electrical DC-conductivity is measured in accordance with “DC conductivity method” , as described under “Determination methods” , on a plaque of the crosslinked polymer composition at 70° C. and 30 kV/mm mean electric field from a non-degassed and 1 mm thick plaque sample of the crosslinked polymer composition.2. The crosslinked polymer composition according to claim 1 , wherein the ...

Polyolefin composition for medium/high/extra high voltage cables comprising benzil-type voltage stabiliser

The present invention relates to a polyolefin composition comprising (i) a polyolefin (A), (ii) a benzil derivative (B) comprising the, preferably consisting of the, structural unit according to the following formula (I). wherein one or more of the carbon atoms in the phenyl rings to which residue R1, R2, R3, R4, R5, R6, R7, R8, R9 or R10 is attached may also be a heteroatom, such as N, in which case the respective residue R1, R2, R3, R4, R5, R6, R7, R8, R9 or R10 is not present; R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10 independently are hydrogen, or a hydrocarbyl group which may contain heteroatoms; or at least two of said R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10 together with the ring atoms of the ring system of formula (I) they are attached to, form a further aromatic or non-aromatic ring fused to the ring system of formula (I), and wherein the ring system of formula (I) with said at least one fused further ring may further bear one to eight substituents, R1' to R8', each of which ...

Electrical HV Transmission Power Cable

A transmission cable includes a conductor or a bundle of conductors extending along a longitudinal axis, which is circumferentially covered by an insulation layer having an extruded insulation material, whereby the transmission cable passes the electrical type test as specified in Cigré TB496, whereby the rated voltage Uis 450 kV or more. The type test includes subjecting the power cable to a DC voltage of 1.85*Uduring 10 to 15 cycles at negative polarity, followed by a polarity reversal with another 10 to 15 cycles at positive polarity at a DC voltage of 1.85*U, followed by additional 2 to 5 cycles during at least 4 to 10 days at positive polarity, and wherein Uis 450 kV, or 525 kV, or more. 1. A transmission cable comprises a conductor or a bundle of conductors extending along a longitudinal axis , which is circumferentially covered by an insulation layer comprising an extruded insulation material , wherein the extruded insulation material comprises a crosslinked polymer composition , which is obtained by crosslinking a polymer composition , which polymer comprises a polyolefin , peroxide and sulphur containing antioxidant , wherein the crosslinked polymer composition has an Oxidation Induction Time , determined according to ASTM-D3895 , ISO/CD 11357 and EN 728 using a Differential Scanning Calorimeter (DSC) , which Oxidation Induction Time corresponds to Z minutes , and comprises an amount of peroxide by-products which corresponds to W ppm determined according to BTM2222 using HPLC , wherein{'br': None, 'i': Z', '≦Z≦Z', ', W', '≦W≦W, 'sub': 1', '2', '1', '2, ', and'}{'br': None, 'i': W≦p−', 'Z, '270*, wherein'}{'sub': 1', '2', '1', '2', '0, 'Zis 0, Zis 60, Wis 0 and Wis 9500, and p is 18500 and wherein the crosslinked polymer composition does not comprise 2,4-diphenyl-4-methyl-1-pentene and whereby the transmission cable passes the electrical type test as specified in Cigré TB496, whereby the rated voltage Uis 450 kV, or more.'}3. The transmission cable according ...

Crosslinkable polymer composition and cable with advantageous electrical properties

The invention relates to a polymer composition with improved DC electrical properties and to a cable surrounded by at least one layer comprising the polymer composition.

Polymer composition for w&c application with advantageous electrical properties

The invention relates to a use of a polymer composition with improved DC electrical properties in a power cable layer and to a cable surrounded by at least one layer comprising the polymer composition.

CROSSLINKABLE POLYMER COMPOSITION AND CABLE WITH ADVANTAGEOUS ELECTRICAL PROPERTIES

A polymer composition with improved DC electrical properties and a cable surrounded by at least one layer comprising the polymer composition are provided. 1. A crosslinked polymer composition comprising a crosslinked polyolefin , wherein the polymer composition comprises , prior to crosslinking , a polyolefin and peroxide which is in an amount of less than 35 mmol —O—O—/kg polymer composition.2. The crosslinked polymer composition according to claim 1 , wherein the polymer composition claim 1 , prior to crosslinking claim 1 , comprises peroxide in amount of 34 mmol —O—O—/kg polymer composition or less.3. The crosslinked polymer composition according claim 1 , wherein the polymer composition comprises a polyolefin which is crosslinked with less than 35 mmol —O—O—/kg polymer composition of the peroxide.4. The crosslinked polymer composition according to claim 1 , wherein the crosslinked polymer composition has an electrical conductivity of 45 fS/m or less claim 1 , when measured according to DC conductivity method as described under “Determination Methods”.5. The crosslinked polymer composition according to claim 1 , wherein the crosslinked polymer composition has an electrical conductivity of 40 fS/m or less claim 1 , when measured according to DC conductivity method as described under “Determination Methods”.6. The crosslinked polymer composition according to claim 1 , wherein the crosslinked polymer composition has a PENT (Pennsylvania Notch Test) life time of 200 hours or more when measured according to PENT test under load at 2 MPa and at ageing temperature of 70° C. as described under “Determination methods”.7. The crosslinked polymer composition according to claim 1 , wherein the crosslinked polymer composition has a Stress at Break at 70° C. of 7.0 MPa or more claim 1 , or at −10° C. of 25.0 MPa or more when measured according to Tensile test method as described under “Determination methods”.8. The crosslinked polymer composition according to claim 1 , wherein ...

POLYOLEFIN COMPOSITION FOR MEDIUM/HIGH/EXTRA HIGH VOLTAGE CABLES COMPRISING BENZIL-TYPE VOLTAGE STABILISER

The present invention relates to a polyolefin composition comprising (i) a polyolefin (A), (ii) a benzil derivative (B) comprising the, preferably consisting of the, structural unit according to the following formula (I). wherein one or more of the carbon atoms in the phenyl rings to which residue R1, R2, R3, R4, R5, R6, R7, R8, R9 or R10 is attached may also be a heteroatom, such as N, in which case the respective residue R1, R2, R3, R4, R5, R6, R7, R8, R9 or R10 is not present; R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10 independently are hydrogen, or a hydrocarbyl group which may contain heteroatoms; or at least two of said R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10 together with the ring atoms of the ring system of formula (I) they are attached to, form a further aromatic or non-aromatic ring fused to the ring system of formula (I), and wherein the ring system of formula (I) with said at least one fused further ring may further bear one to eight substituents, R1′ to R8′, each of which are independently selected from said same groups as R1 to R10; and n=2 to 9; with the proviso that (i) at least one of said R1, R2, R3, R4, R5, R6, R7, R8, R9 or R10, or if present, at least one of said R1′ to R8′, is a hydrocarbyl group which may contain one or more heteroatoms. 2. The polyolefin composition according to wherein said n is 2 to 6.3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. (canceled)12. (canceled)13. (canceled)14. (canceled)15. (canceled)16. (canceled)17. (canceled)18. (canceled)19. (canceled)20. (canceled)21. (canceled)22. The polyolefin composition according to claim 1 , wherein said hydrocarbyl group of proviso (i) contains a heteroatom selected from the group consisting of Si claim 1 , N claim 1 , P claim 1 , O and S.23. The polyolefin composition according to wherein said heteroatom is N and said hydrocarbyl group of proviso (i) contains a tert.-amine group.24. The polyolefin composition according ...

POLYMER COMPOSITION FOR W&C APPLICATION WITH ADVANTAGEOUS ELECTRICAL PROPERTIES

The invention relates to a use of a polymer composition with improved DC electrical properties in a power cable layer and to a cable surrounded by at least one layer comprising the polymer composition. 1. A direct current (DC) power cable comprising a conductor surrounded by at least an inner semiconductive layer , an insulation layer and an outer semiconductive layer , in that order , wherein at least one of the layers comprises a polymer composition comprising(a) a polyolefin provided that, when the polyolefin is a low density polyethylene (LDPE), then it is non-crosslinked, and(b) optionally a second polyolefin which is different from the polyolefin (a).2. The cable according to claim 1 , wherein the inner semiconductive layer comprises a first semiconductive composition claim 1 , the insulation layer comprises an insulation composition and the outer semiconductive layer comprises a second semiconductive composition and wherein the insulation composition of the insulation layer comprises claim 1 , said polymer composition comprising(a) a polyolefin which is a non-crosslinked LDPE, and(b) optionally a second polyolefin which is different from the polyolefin (a), and wherein the outer semiconductive layer comprises, a crosslinked second semiconductive composition and optionally, the inner semicoductive layer comprises a non-crosslinked first semiconductive composition.3. The cable according to claim 1 , wherein the inner semiconductive layer comprises a first semiconductive composition claim 1 , the insulation layer comprises an insulation composition and the outer semiconductive layer comprises a second semiconductive composition claim 1 , in that order claim 1 , and wherein the insulation composition of the insulation layer comprises of said polymer composition comprising(a) a polyolefin which is other than LDPE, and which is optionally non-crosslinked, and(b) optionally a second polyolefin which is different from the polyolefin (a), and wherein, optionally, the ...

POLYMER COMPOSITION FOR W&C APPLICATION WITH ADVANTAGEOUS ELECTRICAL PROPERTIES

The invention relates to a polymer composition with improved DC electrical properties, to the use of the composition for producing a cable layer and to a cable surrounded by at least one layer comprising the polymer composition. 1. A power cable comprising a conductor surrounded by at least an inner semiconductive layer , an insulation layer and an outer semiconductive layer , in that order , wherein at least one of the layers comprises a polymer composition comprising(a) a polyolefin which is other than low density polyethylene (LDPE) and(b) a second polyolefin which is different from the polyolefin (a).2. The cable according to claim 1 , wherein the inner semiconductive layer comprises a first semiconductive composition claim 1 , the insulation layer comprises an insulation composition and the outer semiconductive layer comprises a second semiconductive composition and wherein the insulation composition of the insulation layer comprises the polymer composition.3. The cable according to claim 1 , wherein the polymer composition has an electrical conductivity of 160 fS/m or less claim 1 , when measured according to DC conductivity method (1) using a 1 mm thick plaque sample as described under “Determination Methods”.4. The cable according to claim 1 , wherein the amount of the polyolefin (a) is 0.1 to 99.9 wt % claim 1 , based on the combined weight of the polyolefin (a) and the second polyolefin (b).5. The cable according to claim 1 , wherein the amount of the second polyolefin (b) is 0.1 to 99.9 wt % claim 1 , based on the combined weight of the polyolefin (a) and the second polyolefin (b).6. The cable according to claim 1 , wherein the polyolefin (a) is a polyethylene polymerised in the presence of an olefin polymerisation catalyst and selected from an ethylene homopolymer or a copolymer of ethylene with one or more comonomer(s); or a homo- or copolymer of C3-20 alpha-olefin which is selected from a propylene homopolymer claim 1 , a random copolymer of propylene ...

CROSSLINKABLE POLYMER COMPOSITION AND CABLE WITH ADVANTAGEOUS ELECTRICAL PROPERTIES

The invention relates to a polymer composition with improved DC electrical properties and to a cable surrounded by at least one layer comprising the polymer composition. 1. A use of a polymer composition for producing an insulation layer of a direct current (DC) power cable comprising a conductor surrounded by at least an inner semiconductive layer , the insulation layer and an outer semiconductive layer , in that order , characterised in that the polymer composition comprises(a) a polyolefin and(b) an inorganic filler.2. The use according to for producing a DC cable claim 1 , wherein the inner semiconductive layer comprises a first semiconductive composition claim 1 , the insulation layer comprises an insulation composition and the outer semiconductive layer comprises a second semiconductive composition claim 1 , in that order claim 1 , and wherein the insulation composition of the insulation layer comprises claim 1 , preferably consists claim 1 , of said polymer composition comprising(a) a polyolefin and(b) an inorganic filler.3. The use according to or claim 1 , wherein the polymer composition has an electrical conductivity of 160 fS/m or less claim 1 , preferably of 150 fS/m or less claim 1 , more preferably of 140 fS/m or less claim 1 , more preferably of 130 fS/m or less claim 1 , more preferably of 120 fS/m or less claim 1 , more preferably of 110 fS/m or less claim 1 , more preferably of from 0.01 to 100 fS/m or less claim 1 , more preferably of from 0.05 to 90 fS/m or less claim 1 , when measured according to DC conductivity method (1)) using a 1 mm thick plaque sample as described under “Determination Methods claim 1 , orwherein the polymer composition has an electrical conductivity of 100 fS/m or less, more preferably of 90 fS/m or less, preferably of 0.01 to 80 fS/m, of 0.01 to 70 fS/m, more preferably of 0.05 to 60 fS/m, more preferably of 0.05 to 50 fS/m, more preferably of 0.05 to 45 fS/m, more preferably of 0.05 to 40 fS/m, more preferably of 0.05 to ...

Polyolefin Composition for Medium/High/Extra High Voltage Cables with Improved Electrical Breakdown Strength

This application relates to a polyolefin composition comprising a polyolefin and an aromatic compound. The polyolefin composition can be used in producing medium and high voltage cables with improved electrical breakdown strength.

Polymer Composition for Electrical Devices

The present invention relates to a polymer composition with improved electrical properties and to a use thereof preferably in electrical devices as well as to a cable surrounded by at least one layer including the polymer composition. 1. A polymer composition , comprising:(a) a polyolefin;(b) optionally peroxide which, if present, is preferably present in an amount of less than 35 mmol —O—O—/kg polymer composition; and(c) an ion exchanger additive.2. The polymer composition according to claim 1 , wherein the polyolefin (a) is a polyethylene produced in a high pressure process claim 1 , preferably a low density polyethylene (LDPE) which is selected from an optionally unsaturated LDPE homopolymer or an optionally unsaturated LDPE copolymer of ethylene with one or more comonomer(s).3. The polymer composition according to claim 1 , wherein the polyolefin (a) is an unsaturated LDPE polymer claim 1 , which is selected from an unsaturated LDPE homopolymer or an unsaturated LDPE copolymer of ethylene with one or more comonomer(s) claim 1 , more preferably an unsaturated LDPE homopolymer or an unsaturated LDPE copolymer of ethylene with one or more comonomer(s) which contains vinyl groups and claim 1 , further preferably claim 1 , the total amount of vinyl groups present in the unsaturated LDPE is higher than 0.05/1000 carbon atoms claim 1 , more preferably higher than 0.08/1000 carbon atoms claim 1 , and even more preferably higher than 0.11/1000 carbon atoms claim 1 , when measured according to “Method for determination of the amount of double bonds” described above in the description under “Determination methods”.4. The polymer composition according to claim 1 , wherein the polyolefin (a) is an unsaturated LDPE copolymer of ethylene with at least one polyunsaturated comonomer and optionally with one or more other comonomer(s) claim 1 , preferably the polyunsaturated comonomer comprises a straight carbon chain with at least 8 carbon atoms and at least 4 carbons between the ...

Polymer Composition for Electrical Devices

The present invention relates to a polymer composition, to the use of the composition for producing an electrical device, as well as to a cable surrounded by at least one layer including the polymer composition. 1. A polymer composition , comprising:(a) a polyolefin which is other than low density polyethylene (LDPE);(b) a second polyolefin which is different from the polyolefin (a); and(c) an ion exchanger additive.2. The polymer composition according to claim 1 , wherein the polyolefin (a) is a polyethylene produced in the presence of an olefin polymerisation catalyst and selected from an ethylene homopolymer or a copolymer of ethylene with one or more comonomer(s); or a homo- or copolymer of C3-20 alpha-olefin produced in the presence of an olefin polymerisation catalyst claim 1 , which is preferably selected from a propylene homopolymer claim 1 , a random copolymer of propylene with one or more comonomer(s) or heterophasic copolymer of propylene with one or more comonomer(s) or from homo- or copolymers of butane claim 1 , even more preferably the polyolefin (a) is a polyethylene produced in the presence of an olefin polymerisation catalyst and selected from an ethylene homopolymer or a copolymer of ethylene with one or more comonomer(s).3. The polymer composition according to claim 1 , wherein the polyolefin (a) is polyethylene produced in the presence of an olefin polymerisation catalyst and selected from very low density polyethylene (VLDPE) copolymers claim 1 , linear low density polyethylene (LLDPE) copolymers claim 1 , medium density polyethylene (MDPE) copolymers or high density polyethylene (HDPE) homopolymers or copolymers claim 1 , wherein each type of polyethylene can be unimodal or multimodal with respect to molecular weight distribution claim 1 , preferably the polyolefin (a) is a unimodal or multimodal MDPE polymer or a unimodal or multimodal HDPE polymer claim 1 , most preferably a unimodal or multimodal HDPE.4. The polymer composition according to ...

POLYMER COMPOSITION FOR W&C APPLICATION WITH ADVANTAGEOUS ELECTRICAL PROPERTIES

The invention relates to a use of a polymer composition with improved DC electrical properties in a power cable layer and to a cable surrounded by at least one layer comprising the polymer composition. 1. A direct current (DC) power cable comprising a conductor surrounded by at least an inner semiconductive layer , an insulation layer , and an outer semiconductive layer , in that order , wherein at least one layer comprises a polymer composition comprising:(a) a polyolefin selected from the group consisting of a propylene homopolymer, a random copolymer of propylene with one or more comonomer(s), and a heterophasic copolymer of propylene with one or more comonomer(s), and(b) optionally a second polyolefin which is different from the polyolefin (a).2. The direct current (DC) power cable according to claim 1 , wherein the inner semiconductive layer comprises a first semiconductive composition claim 1 , the insulation layer comprises the polymer composition claim 1 , and the outer semiconductive layer comprises a second semiconductive composition.3. The direct current (DC) power cable according to wherein the outer semiconductive layer comprises the outer semiconductive layer comprises a non-crosslinked or crosslinked second semiconductive composition claim 1 , and the inner semiconductive layer comprises a non-crosslinked first semiconductive composition.4. The direct current (DC) power cable according to claim 1 , wherein the polymer composition has an electrical conductivity of 0.05 to 40 fS/m claim 1 , when measured according to DC conductivity method as described under “Determination Methods”.5. The direct current (DC) power cable according to claim 1 , wherein the amount of the polyolefin (a) is 95 to 100 wt % based on the combined weight of the polyolefin (a) and the optional second polyolefin (b).6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. The direct current (DC) power cable according to claim 1 , wherein the optional second polyolefin (b) is ...

Polymer Composition for Electrical Devices

The present invention relates to a use of a polymer composition preferably in electrical devices as well as to a cable surrounded by at least one layer including the polymer composition. 1. A use of a polymer composition , comprising:(a) a polymer;(b) an ion exchanger additive;for producing an electrical or communication device comprising said polymer composition, preferably for producing an insulation of an electrical or communication device.2. The use of for producing a cable selected from: (a) a polymer; and', '(b) an ion exchanger additive;, '(i) a cable (A) comprising a conductor surrounded by at least one layer comprising a polymer composition which comprisesor (a) a polymer; and', '(b) an ion exchanger additive., '(ii) a cable (B) comprising a conductor surrounded by an inner semiconductive layer, an insulating layer and an outer semiconductive layer, wherein at least the insulation layer comprises a polymer composition which comprises3. The use according to claim 1 , wherein the ion exchanger additive (b) is an inorganic ion exchanger additive; more preferably an inorganic anion exchanger additive; more preferably the anion exchanger additive (b) can exchange anions by halogens (i.e. capture halogens) claim 1 , preferably at least chlorine based species; further preferably the ion exchanger additive (b) has a lamellar structure; and further preferably is a lamellar anion exchanger additive claim 1 , preferably a lamellar anion exchanger additive which comprises anionic interlayers; even further preferably said interlayers of the lamellar anion exchanger (c) comprise CO anions that are exchangeable with the anionic species present in the polymer composition.4. The use according to claim 1 , wherein the ion exchanger additive (b) is an anion exchanger additive of hydrotalcite type claim 1 , preferably of a synthetic hydrotalcite type claim 1 , comprising anionic interlayers which comprise exchangeable COanions.5. The use according to claim 1 , wherein the ...

CROSSLINKABLE COMPOSITION WITH ANTIOXIDANT AND METHANE FORMATION AND ARTICLE

The invention relates to a polymer composition comprising a polyethylene, a crosslinking agent and antioxidant(s), wherein the polymer composition contains a total amount of vinyl groups which is B vinyl groups per 1000 carbon atoms, and B≤B, wherein Bis 0.12, when measured prior to crosslinking according to method ASTM D6248-98, the crosslinking agent is present in an amount which is Z wt %, based on the total amount (100 wt %) of the polymer composition, and Z≤Z≤Z, wherein Zis 0.005 and Zis 2.0, and the antioxidant(s) is/are nitrogen containing antioxidant(s) being present in an amount which is W wt %, based on the total amount (100 wt %) of the polymer composition, and W≤W≤W, wherein Wis 0.005 and Wis 1.0, an article being e.g. a cable, e.g. a power cable, and processes for producing a polymer composition and an article; useful in different end applications, such as wire and cable (W&C) applications. 1. A polymer composition comprising:a polyethylene, a crosslinking agent, and antioxidant(s), [{'sub': 1', '1, 'the polymer composition contains a total amount of vinyl groups which is B vinyl groups per 1000 carbon atoms, and B≤B, wherein Bis 0.12, when measured prior to crosslinking according to method ASTM D6248-98,'}, {'sub': 1', '2', '1', '2, 'the crosslinking agent is present in an amount which is Z wt %, based on the total amount (100 wt %) of the polymer composition, and Z≤Z≤Z, wherein Zis 0.005 and Zis 2.0; and'}, {'sub': 1', '2', '1', '2, 'the antioxidant(s) is/are nitrogen containing antioxidant(s) being present in an amount which is W wt %, based on the total amount (100 wt %) of the polymer composition, and W≤W≤W, wherein Wis 0.005 and Wis 1.0;'}, 'with the proviso that the antioxidants with CAS Number 152261-33-1 and CAS Number 193098-40-7 are excluded., 'characterized in that2. The polymer composition according to claim 1 , wherein the antioxidant(s) is/are hindered amine light stabilizers (HALS).7. The polymer composition according to claim 1 , ...

Cable made from crosslinkable composition with antioxidant and beneficial methane formation

The invention relates to a cable comprising layer(s), which layer(s) is/are obtained from a polymer composition comprising a polyethylene, a crosslinking agent and antioxidant(s), characterized in that the polymer composition contains a total amount of vinyl groups which is B vinyl groups per 1000 carbon atoms, and B1≤B, wherein B1 is 0.12, when measured prior to crosslinking according to method ASTM D6248-98, the crosslinking agent is present in an amount which is Z wt %, prior to crosslinking, based on the total amount (100 wt %) of the polymer composition, and Z1≤Z≤Z2, wherein Z1 is 0.005 and Z2 is 2.0, and that the antioxidant(s) is/are nitrogen containing antioxidant(s) being present in an amount which is W wt %, prior to crosslinking, based on the total amount (100 wt %) of the polymer composition, and W1≤W≤W2, wherein W1 is 0.005 and W2 is 1.0, the cable, e.g. a power cable, and processes for producing the cable; the cable useful in different end applications, such as wire and cable (W&C) applications.

POLYMER COMPOSITION AND CABLE WITH ADVANTAGEOUS ELECTRICAL PROPERTIES

The invention relates to polymer composition comprising a polyolefin (a) and an inorganic filler (b) wherein the polyolefin (a) is obtainable by a high pressure process which process comprises the steps: (i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication, (ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone, (iii) separating the obtained polyolefin (a) from the unreacted products and recovering the separated polyolefin (a) in a recovery zone, wherein in step (i) the compressor lubricant comprises a non-mineral oil, power cable, for example a direct current (DC) power cable, use of a polymer composition and a process for producing a DC power cable. 115-. (canceled)16. A polymer composition comprising a polyolefin (a) , a peroxide and an inorganic filler (b) wherein the polyolefin (a) is obtainable by a high-pressure process which process comprises the steps:(i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication,(ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone,(iii) separating the obtained polyolefin (a) from the unreacted products and recovering the separated polyolefin (a) in a recovery zone, wherein in step (i) the compressor lubricant comprises a non-mineral oil; andwherein the polyolefin (a) is an unsaturated LDPE polymer, which is selected from an unsaturated LDPE homopolymer or an unsaturated LDPE copolymer of ethylene with one or more comonomer(s), and comprises C═C bonds in total amount of 0.2/1000 carbon atoms;wherein the amount of the inorganic filler (b) is 0.1 to 5.0 wt % based on the combined amount of the polyolefin (a) and the inorganic filler (b);wherein the polyolefin (a) comprises 10 to 250 ppm of the non-mineral oil; and wherein the polymer composition comprises peroxide in an amount of 5.0 to less than 40 mmol —O—O—/kg of ...

POWER CABLE COMPRISING POLYPROPYLENE

Power cable comprising a conductor surrounded by at least one layer comprising a polypropylene, wherein the polypropylene comprises nanosized catalyst fragments being evenly distributed in said polypropylene. 1. Power cable comprising a conductor surrounded by at least one layer (L) comprising a polypropylene (PP) , wherein the polypropylene (PP) comprises nanosized catalyst fragments (F) which originate from a solid catalyst system (SCS).2. Power cable comprising a conductor surrounded by at least one layer comprising a polypropylene (PP) , wherein the polypropylene (PP) has been produced in the presence of a solid catalyst system (SCS) , said solid catalyst system (SCS) has(a) a pore volume measured according ASTM 4641 of less than 1.40 ml/g,and/or{'sup': '2', '(b) a surface area measured according to ASTM D 3663 of lower than 30 m/g,'}and/or(c) a mean particle size d50 in the range of 1 to 200 μm.3. Power cable comprising a conductor surrounded by at least one layer comprising a polypropylene (PP) , wherein the polypropylene (PP) has been produced in the presence of a solid catalyst system (SCS) , said solid catalyst system (SCS) is obtained by(a) providing a solution (S) comprising an organometallic compound of a transition metal of one of the groups 3 to 10 of the periodic table (IUPAC),(b) forming a liquid/liquid emulsion system (E), which comprises said solution (S) as droplets dispersed in the continuous phase of the emulsion system (E),(c) solidifying said dispersed phase (droplets) to form the solid catalyst system (SCS).4. Power cable according to claim 1 , wherein said catalyst fragments (F) originate from a solid catalyst system (SCS) claim 1 , (a1) a pore volume measured according ASTM 4641 of less than 1.40 ml/g,', 'and/or', {'sup': '2', '(a2) a surface area measured according to ASTM D 3663 of lower than 30 m/g,'}, 'and/or', '(a3) a mean particle size d50 in the range of 1 to 200 μm,, '(a) said solid catalyst system (SCS) has'}and/or (b1) providing a ...

Polymer Composition for W&C Application with Advantageous Electrical Properties

The invention relates to power cable polymer composition which comprises a single site polyethylene (SSPE), a power cable, for example, a high voltage direct current (HV DC), a power cable polymer insulation, use of a polymer composition for producing a layer of a power cable, and a process for producing a power cable. 1. A power cable polymer composition characterized by that it comprises a single site polyethylene (SSPE) wherein the power cable polymer composition has a DC electrical conductivity of 5.0 fs/m or less when measured according to the DC conductivity method as described under “Deteimination Methods”.2. A power cable polymer composition according to claim 1 , wherein the power cable polymer composition is a power cable insulation polymer composition.3. A power cable polymer composition according to claim 1 , wherein the power cable polymer composition is a thermoplastic power cable polymer composition.4. A power cable polymer composition according to claim 1 , wherein the power cable polymer composition is a high voltage (HV) and/or extra-high voltage (EHV) power cable polymer composition.5. A power cable polymer composition according to claim 1 , wherein the power cable polymer composition is a high voltage direct current (HV DC) and/or an extra high voltage direct current (EHV DC) power cable polymer composition.6. A power cable polymer composition according to claim 1 , wherein the power cable polymer composition has a DC electrical conductivity of 0.05 to 5.0 fS/m claim 1 , e.g. claim 1 , 0.05 to 4.0 fS/m claim 1 , for example claim 1 , 0.01 to 3.0 fS/m claim 1 , or claim 1 , e.g. claim 1 , 0.01 to 2.0 fS/m claim 1 , when measured according to the DC conductivity method as described under “Determination Methods”.7. A power cable polymer composition according to claim 1 , wherein the power cable polymer composition has a DC electrical conductivity of 4.0 fS/m or less claim 1 , e.g. claim 1 , 3.0 fS/m or less claim 1 , for example claim 1 , 2.0 fS/m ...

CROSSLINKABLE POLYMER COMPOSITION AND CABLE WITH ADVANTAGEOUS ELECTRICAL PROPERTIES

A polymer composition includes a crosslinked polyolefin with improved DC electrical properties. Prior to crosslinking, the polymer composition includes a polyolefin and peroxide, in which the peroxide is in an amount of less than 35 mmol —O—O— per kilogram of the polymer composition. A cable can be surrounded by at least one layer including the polymer composition. 1. A crosslinked polymer composition comprising a crosslinked polyolefin , wherein the polymer composition comprises prior to crosslinking a polyolefin and peroxide which is in an amount of less than 35 mmol —O—O—/kg polymer composition.2. The crosslinked polymer composition according to claim 1 , wherein the polymer composition claim 1 , prior to crosslinking claim 1 , comprises peroxide in amount of 34 mmol —O—O—/kg polymer composition or less claim 1 , preferably of 33 mmol —O—O—/kg polymer composition or less claim 1 , more preferably from 5.0 to 30 mmol —O—O—/kg polymer composition claim 1 , more preferably from 7.0 to 30 mmol —O—O—/kg polymer composition claim 1 , more preferably from 10.0 to 30 mmol —O—O—/kg polymer composition.3. The crosslinked polymer composition according claim 1 , wherein the polymer composition comprises a polyolefin which is crosslinked with less than 35 mmol —O—O—/kg polymer composition of the peroxide claim 1 , preferably with an amount of the peroxide as defined in .4. The crosslinked polymer composition according to claim 1 , wherein the crosslinked polymer composition has an electrical conductivity of 45 fS/m or less claim 1 , when measured according to DC conductivity method as described under “Determination Methods”.5. The crosslinked polymer composition according claim 1 , wherein the crosslinked polymer composition has an electrical conductivity of 40 fS/m or less claim 1 , more preferably from 0.01 to 38 fS/m or less claim 1 , even more preferably from 0.5 to 35 fS/m claim 1 , when measured according to DC conductivity method as described under “Determination ...

POLYMER COMPOSITION COMPRISING A POLYETHYLENE

The invention relates to a polymer composition comprising a polyethylene and a crosslinking agent, wherein the polymer composition contains a total amount of vinyl groups which is B vinyl groups per 1000 carbon atoms, and B≤B, wherein Bis 0.88, when measured prior to crosslinking according to method ASTM D624898; and wherein the crosslinking agent is present in an amount which Z wt %, based on the total amount (100 wt %) of the polymer composition, and Z≤Z, wherein Zis 0.60, an article being e.g. a cable, e.g. a power cable, and processes for producing a polymer composition and an article; useful in different end applications, such as wire and cable (W&C) applications. 1. A polymer composition comprising a polyethylene and a crosslinking agent , characterized in that:{'sub': 1', '1, 'the polymer composition contains a total amount of vinyl groups which is B vinyl groups per 1000 carbon atoms, and B≤B, wherein Bis 0.88, when measured prior to crosslinking according to method ASTM D6248-98; and'}{'sub': 2', '2, 'the crosslinking agent is present in an amount which is Z wt %, based on the total amount (100 wt %) of the polymer composition, and Z≤Z, wherein Zis 0.60.'}2. The polymer composition according to according to claim 1 , wherein the polyethylene is unsaturated or saturated.3. The polymer composition according to claim 1 , wherein decomposition of the crosslinking agent claim 1 , during crosslinking of the polymer composition claim 1 , results in formation of less than 200 ppm of methane claim 1 , when measured according to the method for GC-Analysis.4. The polymer composition according to claim 1 , wherein the polymer composition is crosslinked and has a hot set elongation claim 1 , with a load of 20 N/cm claim 1 , which is less than 175% claim 1 , when measured according to the method for Hot Set Determination.5. The polymer composition according to claim 1 , wherein the polyethylene is an unsaturated LDPE polymer.6. The polymer composition according to claim ...

CROSSLINKABLE COMPOSITION WITHOUT ANTIOXIDANT AND BENEFICIAL METHANE FORMATION WITH REDUCED CROSSLINKING

The invention relates to a polymer composition comprising a polyethylene and a crosslinking agent, characterized in that the polymer composition contains a total amount of vinyl groups which is B vinyl groups per 1000 carbon atoms, and B≤B, wherein Bis 0.88, when measured prior to crosslinking according to method ASTM D6248-98; and in that the crosslinking agent is present in an amount which is Z wt %, based on the total amount (100 wt %) of the polymer composition, and Z≤Z, wherein Zis 0.30, an article being e.g. a cable, e.g. a power cable, and processes for producing a polymer composition and an article; useful in different end applications, such as wire and cable (W&C) applications. 1. A polymer composition comprising:a polyethylene and a crosslinking agent, [{'sub': 1', '1, 'the polymer composition contains a total amount of vinyl groups which is B vinyl groups per 1000 carbon atoms, and B≤B, wherein Bis 0.88, when measured prior to crosslinking according to method ASTM D6248-98; and'}, {'sub': 2', '2, 'the crosslinking agent is present in an amount which is Z wt %, based on the total amount (100 wt %) of the polymer composition, and Z≤Z, wherein Zis 0.30.'}], 'characterized in that2. The polymer composition of claim 1 , wherein the polyethylene is unsaturated or saturated.3. The polymer composition of claim 1 , wherein decomposition of the crosslinking agent claim 1 , during crosslinking of the polymer composition claim 1 , results in formation of less than 130 ppm of methane claim 1 , when measured according to the method for GC-Analysis.4. The polymer composition of claim 1 , wherein the polymer composition is crosslinked and has a hot set elongation claim 1 , with a load of 5 N/cm claim 1 , which is less than 175% claim 1 , when measured according to the method for Hot Set Determination.5. The polymer composition of claim 1 , wherein the polyethylene is an unsaturated LDPE polymer.6. The polymer composition claim 1 , wherein the polyethylene is a copolymer ...

CABLE MADE FROM CROSSLINKABLE COMPOSITION WITHOUT ANTIOXIDANT AND WITH BENEFICIAL METHANE FORMATION

The invention relates to a cable comprising layer(s), which layer(s), is/are obtained from a polymer composition, wherein the polymer composition comprises a polyethylene and a crosslinking agent, wherein the polymer composition contains a total amount of vinyl groups which is B vinyl groups per 1000 carbon atoms, and B≤B, wherein Bis 0.88, when measured prior to crosslinking according to method ASTM D6248-98; and wherein the crosslinking agent is present in an amount which is Z wt %, prior to crosslinking, based on the total amount (100 wt %) of the polymer composition, and Z≤Z, wherein Zis 0.60, the cable, e.g. being a power cable, and processes for producing the cable; the cable useful in different end applications, such as wire and cable (W&C) applications. 1. A cable comprising layer(s) , wherein the layer(s) , is/are obtained from a polymer composition , wherein the polymer composition comprises:a polyethylene and a crosslinking agent, [{'sub': 1', '1, 'the polymer composition contains a total amount of vinyl groups which is B vinyl groups per 1000 carbon atoms, and B≤B, wherein Bis 0.88, when measured prior to crosslinking according to method ASTM D6248-98; and'}, {'sub': 2', '2, 'the crosslinking agent is present in an amount which is Z wt %, prior to crosslinking, based on the total amount (100 wt %) of the polymer composition, and Z≤Z, wherein Zis 0.60.'}], 'characterized in that2. The cable of claim 1 , wherein the polyethylene is unsaturated.3. The cable of claim 1 , wherein Bis 0.90.4. The cable of claim 1 , wherein Z2 is 0.58 claim 1 , 0.56 claim 1 , 0.54 claim 1 , 0.52 claim 1 , 0.50 claim 1 , 0.48 claim 1 , 0.46 claim 1 , 0.44 claim 1 , 0.42 or 0.40.5. The cable claim 1 , of claim 1 , wherein said layer(s) is/are crosslinked claim 1 , and the decomposition of the crosslinking agent during the crosslinking results in a content of less than 200 ppm of methane claim 1 , when measured according to the method for GC-Analysis.6. The cable claim 1 , of ...

A POLYETHYLENE WITH A HIGH VINYL CONTENT AND WITH A LOW MFR

The invention relates to a polyethylene having a melt flow rate at (2.16) kg loading (MFR), determined according to method ISO1133-1:2011, which MFRis A g/10 min and A≤A≤A; wherein Ais (0.5) and Ais (1.70), and containing a total amount of vinyl groups which is B vinyl groups per (1000) carbon atoms, and B≤B, wherein Bis (0.45), determined according to method ASTM D6248-98, a polymer composition, an article being e.g. a cable, e.g. a power cable, and processes for producing a polyethylene, a polymer composition and an article, and an article; useful in different end applications, such as wire and cable (W&C) applications. 1. A polyethylene , characterized in that:{'sub': 2', '2', '1', '2', '1', '2, 'the polyethylene has a melt flow rate at 2.16 kg loading (MFR), determined according to method ISO 1133-1:2011, wherein the MFRis A g/10 min and A≤A≤A, wherein Ais 0.5 and Ais 1.70; and'}{'sub': 1', '1, 'wherein the polyethylene contains a total amount of vinyl groups which is B vinyl groups per 1000 carbon atoms, and B≤B, wherein Bis 0.45, determined according to method ASTM D6248-98.'}2. The polyethylene according to claim 1 , wherein Bis 0.58.3. The polyethylene according to claim 1 , wherein Ais 1.65 claim 1 , 1.60 claim 1 , 1.55 or 1.50.4. The polyethylene according to claim 1 , wherein B≤Band Bis 3.0.5. The polyethylene according to claim 1 , wherein the polyethylene is an unsaturated LDPE polymer.6. The polyethylene according to claim 1 , which wherein the polyethylene is a homopolymer of ethylene or is an unsaturated copolymer comprising one or more polyunsaturated comonomer(s).7. The polyethylene according to claim 1 , wherein the polyethylene is a copolymer of:a monomer,at least one polyunsaturated comonomer; andzero or one or more other comonomer(s); andwherein said total amount of vinyl groups (B) present in the polyethylene includes vinyl groups originating from said at least one polyunsaturated comonomer, e.g. diene.8. The polyethylene according to claim 1 ...

A polyethylene with a high vinyl content and beneficial rheological properties

The invention relates to a polyethylene which contains a total amount of vinyl groups which is B vinyl groups per 1000 carbon atoms, and B1≤B, wherein B1 is 0.30; and has a complex viscosity (η*) at 0.05 rad/sec, which is X Pas, and X1≤X≤X2, wherein X1 is 10000 and X2 is 30000; and has a complex viscosity (η*) at 300 rad/sec, which is Y Pas, and Y1≤Y≤Y2, wherein Y1 is 5 and Y2 is 350, both complex viscosities (η*) are determined according to method ISO 6721-1 on stabilised samples of the polyethylene, a polymer composition, an article being e.g. a cable, e.g. a power cable, and processes for producing a polyethylene, a polymer composition and an article, and an article; useful in different end applications, such as wire and cable (W&C) applications.

Crosslinked polymer composition for cable accessories

A crosslinked polymer composition based on a plastomer, which is suitable for producing at least one layer of cable accessories like cable joints, bushings or terminations; its use for preparing such a layer and the cable accessory comprising the composition.

POLYMER COMPOSITION AND CABLE WITH ADVANTAGEOUS ELECTRICAL PROPERTIES

The invention relates to polymer composition comprising a polyolefin (a) and an inorganic filler (b) wherein the polyolefin (a) is obtainable by a high pressure process which process comprises the steps: (i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication, (ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone, (iii) separating the obtained polyolefin (a) from the unreacted products and recovering the separated polyolefin (a) in a recovery zone, wherein in step (i) the compressor lubricant comprises a non-mineral oil, power cable, for example a direct current (DC) power cable, use of a polymer composition and a process for producing a DC power cable. 119.-. (canceled)20. A polymer composition comprisinga polyolefin (a) and an inorganic filler (b)wherein the polyolefin (a) is obtainable by a high pressure process which process comprises the steps:(i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication,(ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone,(iii) separating the obtained polyolefin (a) from the unreacted products and recovering the separated polyolefin (a) in a recovery zone,wherein in step (i) the compressor lubricant comprises a non-mineral oil.211. A polymer composition according to claim , wherein the non-mineral oil is polyalkylene glycol (PAG).221. A polymer composition according to claim , wherein the polymer composition has an electrical conductivity of 140 fS/m or less , for example , of 135 fS/m or less , for example , of 130 fS/m or less , for example , of 125 fS/m or less , for example , of 120 fS/m or less , for example , of 115 fS/m or less , for example , of from 0.01 to 110 fS/m or less , for example , of from 0.05 to 105 fS/m or less , when measured according to DC conductivity method using a 1 mm thick plaque sample as ...

POLYMER COMPOSITION FOR W&C APPLICATION WITH ADVANTAGEOUS ELECTRICAL PROPERTIES

The invention relates to a polymer composition with improved DC electrical properties, to the use of the composition for producing a cable layer and to a cable surrounded by at least one layer comprising the polymer composition. 1. (canceled)2. (canceled)3. The cable according to claim 15 , wherein the crosslinked polymer composition has an electrical conductivity of from 0.05 to 10.0 fS/m claim 15 , when measured according to DC conductivity method (1) using a 1 mm thick plaque sample as described under “Determination Methods”.4. The cable according to claim 15 , wherein the amount of the polyethylene (a) is from 1.0 to 30 wt % based on the combined weight of the polyethylene (a) and the LDPE (b).5. The cable according to claim 15 , wherein the amount of the LDPE (b) is from 70 to 99.0 wt % based on the combined weight of the polyethylene (a) and the LDPE (b).6. (canceled)7. The cable according to claim 15 , wherein the polyethylene (a) is selected from very low density polyethylene (VLDPE) copolymers claim 15 , linear low density polyethylene (LLDPE) copolymers claim 15 , medium density polyethylene (MDPE) copolymer claim 15 , or high density polyethylene (HDPE) homopolymers or copolymers.8. (canceled)9. The cable according to claim 15 , wherein the crosslinked polymer composition has a weight fraction of crystals with lamella thickness >10 nm of at least 0.5 wt % claim 15 , when measured according to DSC method as described in the description part under “Determination Methods”.10. The cable according to claim 15 , wherein the LDPE (b) is a saturated or unsaturated LDPE homopolymer or a saturated or unsaturated LDPE copolymer of ethylene with one or more comonomer(s).11. The cable according to claim 15 , wherein the LDPE (b) is an unsaturated LDPE polymer claim 15 , which is selected from an unsaturated LDPE homopolymer or an unsaturated LDPE copolymer of ethylene with one or more comonomer(s) claim 15 , and wherein the LDPE (b) comprises a total amount of carbon- ...

Power Cable Polymer Composition Comprising Thermoplastic and Having Advantageous Properties

The invention relates to power cable polymer composition which comprises a thermoplastic polyethylene having a chlorine content which is less than X, wherein X is 10 ppm, a power cable, for example, a high voltage direct current (HV DC), a power cable polymer insulation, use of a polymer composition for producing a layer of a power cable, and a process for producing a power cable. 1. A power cable insulation polymer composition comprising a single site thermoplastic polyethylene having a chlorine content which is less than X , wherein X is 10 ppm; wherein the thermoplastic polyethylene is multimodal , and is a medium density ethylene copolymer or a high density ethylene homopolymer or copolymer.2. A power cable insulation polymer composition according to claim 1 , wherein the power cable insulation polymer composition is a thermoplastic power cable insulation polymer composition.3. A power cable insulation polymer composition according to claim 1 , wherein the power cable insulation polymer composition is a high voltage (HV) and/or extra-high voltage (EHV) power cable insulation polymer composition.4. A power cable insulation polymer composition according to claim 1 , wherein the power cable insulation polymer composition is a high voltage direct current (HV DC) and/or an extra high voltage direct current (EHV DC) power cable insulation polymer composition.5. A power cable insulation polymer composition according to claim 1 , wherein the power cable insulation polymer composition has a DC electrical conductivity of 45 fS/m or less.6. A power cable insulation polymer composition according to claim 1 , wherein the power cable insulation polymer composition has a DC electrical conductivity of 10.0 fS/m or less.7. A power cable insulation polymer composition according to claim 1 , wherein X is 5.0 ppm.8. A power cable which power cable comprises a polymer composition being claim 1 , or comprising claim 1 , the power cable insulation polymer composition according to .9. ...

Electric Power Cable And A Process For The Production Of The Power Cable

An electric power cable and a process for the production of the cable including a metal conductor and an electric insulation system surrounding the conductor coaxially and radially outwards of the conductor having improved electric properties. The insulation system includes an inner semi-conducting layer surrounded radially outwards by an insulation layer and wherein the insulation layer is surrounded radially outwards by an outer semi-conducting layer. The electric power cable further includes an inner water blocking material arranged in the conductor and/or to surround the conductor radially outwards and an outer water blocking material arranged radially outwards from the insulation system. An inner barrier layer is arranged as a diffusion hindering layer between the inner water blocking material and the insulation system and an outer barrier layer is arranged as a diffusion hindering layer between the insulation system and the outer water blocking material. 112202220101214618208620162018. Electric power cable () comprising a metal conductor () and an electric insulation system () surrounding the conductor () coaxially and radially outwards of the conductor () , wherein the insulation system () comprises an inner semi-conducting layer () surrounded radially outwards by an insulation layer () and wherein the insulation layer is surrounded radially outwards by an outer semi-conducting layer () , the electric power cable further comprising an inner water blocking material () arranged in the conductor and/or to surround the conductor radially outwards and an outer water blocking material () arranged radially outwards from the insulation system () , characterized in that an inner barrier layer () is arranged as a diffusion hindering layer between the inner water blocking material () and the insulation system () and an outer barrier layer () is arranged as a diffusion hindering layer between the insulation system () and the outer water blocking material ().2181620. ...

CABLE WITH IMPROVED ELECTRICAL PROPERTIES

A cable comprising a conductor surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein the insulation layer is not crosslinked or is cross-linked and comprises at least 90 wt % of a polymer composition, said polymer composition comprising: (I) 95.5 to 99.9 wt % of an LDPE; and (II) 0.1 to 4.5 wt % of an HDPE having a density of at least 940 kg/m. 1. A cable comprising one or more conductors surrounded by at least an inner semiconductive layer , an insulation layer and an outer semiconductive layer , in that order , wherein the insulation layer is not crosslinked or is cross-linked and comprises at least 90 wt % of a polymer composition , said polymer composition comprising:(I) 95.5 to 99.9 wt % of an LDPE; and{'sup': '3', '(II) 0.1 to 4.5 wt % of an HDPE having a density of at least 940 kg/m.'}2. A cable comprising one or more conductors surrounded by at least an inner semiconductive layer , an insulation layer and an outer semiconductive layer , in that order , wherein the insulation layer is not cross-linked and comprises at least 90 wt % of a polymer composition , said polymer composition comprising:(I) 95.5 to 99.9 wt % of an LDPE; and{'sup': '3', '(II) 0.1 to 4.5 wt % of a multimodal HDPE having a density of at least 940 kg/m.'}3. The cable of claim 1 , wherein the cable is a power cable.4. The cable of claim 1 , wherein the LDPE has an MFR(2.16 kg claim 1 , 190° C.) of 0.1 to 10 g/10 min.5. The cable of claim 1 , wherein the LDPE is a homopolymer.6. The cable of claim 1 , wherein the HDPE has a density of 945 to 965 kg/m.7. The cable of claim 1 , wherein the LDPE has a density of 920 to 932 kg/m.8. The cable of claim 1 , wherein its the HDPE has a MFR(2.16 kg claim 1 , 190° C.) of 0.1-40 g/10 min.9. The cable of claim 1 , wherein the polymer composition of the insulation layer has a conductivity of 1.5 fS/m or less when measured according to DC conductivity method as described under “ ...

Cable and composition

A cable comprising one or more conductors surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein the insulation layer is not crosslinked and comprises at least 90 wt % of a polymer composition, said polymer composition comprising: (I) 85.0 to 99.5 wt % of an LDPE; and (II) 0.5 to 15.0 wt % of an HDPE having a density of at least 940 kg/m 3 or 1.5 to 15.0 wt % of an ultra-high molecular weight polyethylene having a Mw of at least 1,000,000.

POLYMER COMPOSITION AND CABLE WITH ADVANTAGEOUS ELECTRICAL PROPERTIES

The invention relates to a polymer composition comprising polyolefin (a), which is other than low density polyethylene (LDPE), and polyolefin (b), which is an LDPE polymer and obtainable by a high pressure process which process comprises the steps: (i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication, (ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone, (iii) separating the obtained polyolefin (b) from the unreacted products and recovering the separated polyolefin in a recovery zone, wherein in step (i) the compressor lubricant comprises a non-mineral oil; a power cable, e.g. of a direct current (DC) power cable, use of a polymer composition and a process for producing a DC power cable. 1. A polymer composition comprisingpolyolefin (a), which is other than low density polyethylene (LDPE), andpolyolefin (b), which is an LDPE polymer and obtainable by a high pressure process which process comprises the steps:(i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication,(ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone,(iii) separating the obtained polyolefin (b) from the unreacted products and recovering the separated polyolefin in a recovery zone,wherein in step (i) the compressor lubricant comprises a non-mineral oil.2. A polymer composition according to claim 1 , wherein the non-mineral oil is polyalkylene glycol (PAG).3. A polymer composition according to claim 1 , wherein the polyolefin (a) is selected from a polyethylene or a polypropylene.4. A polymer composition according to claim 1 , wherein the polyolefin (a) is a polyethylene produced in the presence of an olefin polymerisation catalyst claim 1 , e.g. a polyethylene selected from a MDPE polymer or a HDPE polymer claim 1 , for example claim 1 , a HDPE polymer.5. A polymer composition ...

POLYMER COMPOSITION FOR CABLE APPLICATIONS WITH ADVANTAGEOUS ELECTRICAL PROPERTIES

The invention relates to a polymer composition comprising polyolefin (a), which is other than low density polyethylene (LDPE), and polyolefin (b), which is an LDPE polymer and obtainable by a high pressure process which process comprises the steps: (i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication, (ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone, (iii) separating the obtained polyolefin (b) from the unreacted products and recovering the separated polyolefin in a recovery zone, wherein in step (i) the compressor lubricant comprises a non-mineral oil; a power cable, e.g. of a direct current (DC) power cable, use of a polymer composition and a process for producing a DC power cable. 1. A polymer composition comprisingpolyolefin (a), which is other than low density polyethylene (LDPE), andpolyolefin (b), which is an LDPE polymer and obtainable by a high pressure process which process comprises the steps:(i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication,(ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone,(iii) separating the obtained polyolefin (b) from the unreacted products and recovering the separated polyolefin in a recovery zone,wherein in step (i) the compressor lubricant comprises a non-mineral oil.2. A polymer composition according to claim 1 , wherein the non-mineral oil is polyalkylene glycol (PAG).3. A polymer composition according to claim 1 , wherein the polyolefin (a) is selected from a polyethylene or a polypropylene.4. A polymer composition according to claim 1 , wherein the polyolefin (a) is a polyethylene produced in the presence of an olefin polymerisation catalyst claim 1 , e.g. a polyethylene selected from a MDPE polymer or a HDPE polymer claim 1 , for example claim 1 , a HDPE polymer.5. A polymer composition ...

Cable with advantageous electrical properties

A cable comprising one or more conductors surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein said insulation layer comprises at least 90 wt % of a polymer composition, said polymer composition comprising (I) 80.0 to 99.9 wt % of an LDPE homopolymer or copolymer; and (II) 0.1 to 20.0 wt % of: (i) an ultra-high molecular weight polyethylene having a Mw of at least 1,000,000; or (ii) a single site catalysed medium density polyethylene (MDPE) having a density of 925 to 940 kg/m3 or a single site catalysed linear low density polyethylene (LLDPE) having a density of 910 to 925 kg/m3.

Power Cable Polymer Composition Comprising Thermoplastic and Having Advantageous Properties

The invention relates to power cable polymer composition which comprises a thermoplastic polyethylene having a chlorine content which is less than X, wherein X is 10 ppm, a power cable, for example, a high voltage direct current (HV DC), a power cable polymer insulation, use of a polymer composition for producing a layer of a power cable, and a process for producing a power cable.

Polymer composition for W and C application with advantageous electrical properties

The invention relates to a polymer composition with improved DC electrical properties, to the use of the composition for producing a cable layer and to a cable surrounded by at least one layer comprising the polymer composition.

Polymer composition for W and C application with advantageous electrical properties

The invention relates to a use of a polymer composition with improved DC electrical properties in a power cable layer and to a cable surrounded by at least one layer comprising the polymer composition.

Polymer composition for W and C application with advantageous electrical properties

The invention relates to a polymer composition with improved DC electrical properties, to the use of the composition for producing a cable layer and to a cable surrounded by at least one layer comprising the polymer composition.

Cable with advantageous electrical properties

A cable comprising one or more conductors surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein said insulation layer comprises at least 90 wt% of a polymer composition, said polymer composition comprising (I) 80.0 to 99.9 wt% of an LDPE homopolymer or copolymer; and (II) 0.1 to 20.0 wt% of: (i) an ultra-high molecular weight polyethylene having a Mw of at least 1,000,000; or (ii) a single site catalysed medium density polyethylene (MDPE) having a density of 925 to 940 kg/m 3 or a single site catalysed linear low density polyethylene (LLDPE) having a density of 910 to 925 kg/m 3.

Cable and composition

A cable comprising one or more conductors surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein the insulation layer is not crosslinked and comprises at least 90 wt% of a polymer composition, said polymer composition comprising: (I) 85.0 to 99.5 wt% of an LDPE; and (II) 0.5 to 15.0 wt% of an HDPE having a density of at least 940 kg/m 3 or 1.5 to 15.0 wt% of an ultra-high molecular weight polyethylene having a Mw of at least 1,000,000.

Cable with improved electrical properties

A cable comprising a conductor surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein the insulation layer is not crosslinked or is cross-linked and comprises at least 90 wt% of a polymer composition, said polymer composition comprising: (I) 95.5 to 99.9 wt% of an LDPE; and (II) 0.1 to 4.5 wt% of an HDPE having a density of at least 940 kg/m 3 .

Polymer composition for W and C application with advantageous electrical properties

The invention relates to power cable polymer composition which comprises a single site polyethylene (SSPE), a power cable, for example, a high voltage direct current (HV DC), a power cable polymer insulation, use of a polymer composition for producing a layer of a power cable, and a process for producing a power cable.

Polymer for power cable insulation

A multimodal polyethylene composition having a lower molecular weight (LMW) ethylene homo or copolymer component (A) and a higher molecular weight ethylene copolymer component (B); wherein the lower molecular weight component comprises: (ai) a first fraction which comprises an ethylene homo or copolymer of ethylene and one or more C3-10 alpha olefins; and (aii) a second fraction which comprises a different ethylene homo or copolymer of ethylene and one or more C3-10 alpha olefins; wherein the multimodal polymer composition has a density of 930kg/m 3 or more (ISO1183), such as 938 to 955 kg/m 3 , an MFR2 (ISO1133 at 190ºC and 2.16 kg load) in the range of 0.05 to 10 g/10min, and a flexural modulus of up to 800 MPa, such as 300 to 800 MPa (ISO 178:2010).

Power cable polymer composition and power cable with advantageous properties

The invention relates to power cable polymer composition which comprises comprises a single site catalyst solution polymerised polyethylene ("SS SPPE"), a power cable, for example, a high voltage direct current (HV DC), a power cable polymer insulation, use of a polymer composition for producing a layer of a power cable, and a process for producing a power cable.

Power cable polymer composition, power cable and uses with advantageous properties

The invention relates to power cable polymer composition which comprises a solution polymerised low pressure polyethylene ("SP LPPE"), a power cable, for example, a high voltage direct current (HV DC), a power cable polymer insulation, use of a polymer composition for producing a layer of a power cable, and a process for producing a power cable.

DC POWER CABLE, ITS PRODUCTION PROCESS AND USE OF A POLYMER COMPOSITION

composição de polímero para aplicação f&c com propriedades elétricas vantajosas. a presente invenção refere-se ao uso da composição de polímero com propriedade elétricas cc aperfeiçoadas em uma camada de cabo de alimentação e em um cabo envolvido por pelo menos uma camada que compreende a composição de polímero. polymer composition for f & c application with advantageous electrical properties. the present invention relates to the use of the polymer composition with improved electrical properties in a layer of power cable and in a cable surrounded by at least one layer comprising the polymer composition.

Cable and composition

A cable having one or more conductors surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein the insulation layer is not crosslinked and has at least 90 wt % of a polymer composition, said polymer composition having: (I) 85.0 to 99.5 wt % of an LDPE; and (II) 0.5 to 15.0 wt % of an HDPE having a density of at least 940 kg/m 3 or 1.5 to 15.0 wt % of an ultra-high molecular weight polyethylene having a Mw of at least 1,000,000.

Cable with advantageous electrical properties

A cable having one or more conductors surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order. The insulation layer has at least 90 wt % of a polymer composition, said polymer composition having 80.0 to 99.9 wt % of an LDPE homopolymer or copolymer; and 0.1 to 20.0 wt % of: an ultra-high molecular weight polyethylene having a Mw of at least 1,000,000; or a single site catalysed medium density polyethylene (MDPE) having a density of 925 to 940 kg/m3 or a single site catalysed linear low density polyethylene (LLDPE) having a density of 910 to 925 kg/m3.

Cable with improved electrical properties

A cable comprising a conductor surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein the insulation layer is not crosslinked or is cross-linked and comprises at least 90 wt % of a polymer composition, said polymer composition comprising: (I) 95.5 to 99.9 wt % of an LDPE; and (II) 0.1 to 4.5 wt % of an HDPE having a density of at least 940 kg/m3.

Cable with advantageous electrical properties

A cable comprising one or more conductors surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein said insulation layer comprises at least 90 wt% of a polymer composition, said polymer composition comprising (I) 80.0 to 99.9 wt% of an LDPE homopolymer or copolymer; and (II) 0.1 to 20.0 wt% of: (i) an ultra-high molecular weight polyethylene having a Mw of at least 1,000,000; or (ii) a single site catalysed medium density polyethylene (MDPE) having a density of 925 to 940 kg/m 3 or a single site catalysed linear low density polyethylene (LLDPE) having a density of 910 to 925 kg/m 3 .

Cable with improved electrical properties

A cable comprising a conductor surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer, in that order, wherein the insulation layer is not crosslinked or is cross-linked and comprises at least 90 wt% of a polymer composition, said polymer composition comprising: (I) 95.5 to 99.9 wt% of an LDPE; and (II) 0.1 to 4.5 wt% of an HDPE having a density of at least 940 kg/m 3 .

Polymer composition for w&c application with advantageous electrical properties

Polymer composition for electrical devices

The invention relates to a polymer composition, to the use of the composition for producing an electrical device, as well as, to a cable surrounded by at least one layer comprising the polymer composition.

Polymer composition for electrical devices

The present invention relates to a use of a polymer composition preferably in electrical devices as well as to a cable surrounded by at least one layer including the polymer composition.

Polymer composition for electrical and communication devices

Polymer composition for electrical devices

Polymer composition for electrical devices

The present invention relates to a polymer composition, to the use of the composition for producing an electrical device, as well as to a cable surrounded by at least one layer including the polymer composition.

Crosslinkable polymer composition and cable with advantageous electrical properties

A cross-linked polymer composition includes a cross-linked polyolefin. Peroxide in an amount of less than 35 mmol —O—O—/kg polymer composition may be included in the polymer composition prior to crosslinking the polyolefin. Suitable polyolefins that can be cross-linked in the polymer composition include an unsaturated LDPE homopolymer and an unsaturated LDPE copolymer of ethylene with one or more comonomers. Such unsaturated LDPE polymer can contain vinyl groups, and the total amount of vinyl groups present in the unsaturated LDPE can be higher than 0.05/1000 carbon atoms. The cross-linked polymer composition can be used, for example, in producing a cross-linkable and cross-linked article such as a cross-linkable and cross-linked direct current (DC) or other type of power cable.

Crosslinkable polymer composition and cable with advantageous electrical properties

A polymer composition includes a crosslinked polyolefin with improved DC electrical properties. Prior to crosslinking, the polymer composition includes a polyolefin and peroxide, in which the peroxide is in an amount of less than 35 mmol —O—O— per kilogram of the polymer composition. A cable can be surrounded by at least one layer including the polymer composition.

Polymer composition and cable with advantageous electrical properties

The invention relates to a polymer composition comprising polyolefin (a), which is other than low density polyethylene (LDPE), and polyolefin (b), which is an LDPE polymer and obtainable by a high pressure process which process comprises the steps: (i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication, (ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone, (iii) separating the obtained polyolefin (b) from the unreacted products and recovering the separated polyolefin in a recovery zone, wherein in step (i) the compressor lubricant comprises a non-mineral oil; a power cable, e.g. of a direct current (DC) power cable, use of a polymer composition and a process for producing a DC power cable.

Polymer composition for cable applications with advantageous electrical properties

The invention relates to a polymer composition comprising polyolefin (a), which is other than low density polyethylene (LDPE), and polyolefin (b), which is an LDPE polymer and obtainable by a high pressure process which process comprises the steps: (i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication, (ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone, (iii) separating the obtained polyolefin (b) from the unreacted products and recovering the separated polyolefin in a recovery zone, wherein in step (i) the compressor lubricant comprises a non-mineral oil; a power cable, e.g. of a direct current (DC) power cable, use of a polymer composition and a process for producing a DC power cable.

Polymer composition and cable with advantageous electrical properties

The invention relates to polymer composition comprising a polyolefin (a) and an inorganic filler (b) wherein the polyolefin (a) is obtainable by a high pressure process which process comprises the steps: (i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication, (ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone, (iii) separating the obtained polyolefin (a) from the unreacted products and recovering the separated polyolefin (a) in a recovery zone, wherein in step (i) the compressor lubricant comprises a non-mineral oil, power cable, for example a direct current (DC) power cable, use of a polymer composition and a process for producing a DC power cable.

Polymer composition for w&c application with advantageous electrical properties

The invention relates to power cable polymer composition which comprises a single site polyethylene (SSPE), a power cable, for example, a high voltage direct current (HV DC), a power cable polymer insulation, use of a polymer composition for producing a layer of a power cable, and a process for producing a power cable.

Power cable polymer composition comprising thermoplastic and having advantageous properties

The invention relates to power cable polymer composition which comprises a thermoplastic polyethylene having a chlorine content which is less than X, wherein X is 10 ppm, a power cable, for example, a high voltage direct current (HV DC), a power cable polymer insulation, use of a polymer composition for producing a layer of a power cable, and a process for producing a power cable.

Polymer composition for cable applications with advantageous electrical properties

The invention relates to a polymer composition comprising polyolefm (a), which is other than low density polyethylene (LDPE), and polyolefm (b), which is an LDPE polymer and obtainable by a high pressure process which process comprises the steps: (i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication, (ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone, (iii) separating the obtained polyolefm (b) from the unreacted products and recovering the separated polyolefm in a recovery zone, wherein in step (i) the compressor lubricant comprises a non-mineral oil; a power cable, e.g. of a direct current (DC) power cable, use of a polymer composition and a process for producing a DC power cable.

Crosslinkable polymer composition and cable with advantageous electrical properties

The invention relates to a polymer composition with improved DC electrical properties and to a cable surrounded by at least one layer comprising the polymer composition.

Power cable comprising polypropylene

Polymer composition and cable with advantageous electrical properties

Power cable polymer composition with advantageous electrical properties

The invention relates to power cable polymer composition which comprises a chromium catalyst polyethylene (CrPE), a power cable, for example, a high voltage direct current (HVDC), a power cable polymer insulation, use of a polymer composition for producing a layer of a power cable, and a process for producing a power cable.

Polymer composition for w&c application with advantageous electrical properties

The invention relates to power cable polymer composition which comprises a single site polyethylene (SSPE), a power cable, for example, a high voltage direct current (HV DC), a power cable polymer insulation, use of a polymer composition for producing a layer of a power cable, and a process for producing a power cable.

Power cable polymer composition comprising thermoplastic and having advantageous properties

The invention relates to power cable polymer composition which comprises a thermoplastic polyethylene having a chlorine content which is less than X,wherein Xis 10 ppm,a power cable, for example, a high voltage direct current (HVDC), a power cable polymer insulation, use of a polymer composition for producing a layer of a power cable, and a process for producing a power cable.

Polymer composition for w&c application with advantageous electrical properties

The invention relates to a polymer composition with improved DC electrical properties, to the use of the composition for producing a cable layer and to a cable surrounded by at least one layer comprising the polymer composition.

power cable, production process, polymer composition and use

composição de polímero para aplicação w&c com propriedades elétricas vantajosas. a invenção refere-se a uma composição de polímero com propriedades elétricas cc aperfeiçoadas, ao uso da composição para produzir uma camada de cabo de alimentação a um cabo envolvido por pelo emos uma camada que compreende a composição de polímero. polymer composition for w & c application with advantageous electrical properties. the invention relates to a polymer composition with improved electrical properties, the use of the composition to produce a layer of power cable to a cable surrounded by at least a layer comprising the polymer composition.

Polyethylene polymer composition and power cable with improved electrical properties

The present invention relates the a power cable with at least three layers, an inner semiconductive layer, an insulation layer, and an outer semiconductive layer, wherein at least the insulation layer comprises a new polymer composition to achieve minimisation of conductivity of the insulating layer. The present invention also relates to the process of producing the power cable and the polymer composition, and the use thereof in wire and cable applications.

A new crosslinked polymer composition, structured layer and cable

The present invention relates to a crosslinked polymer composition comprising a crosslinked polyolefin, wherein the polymer composition comprises, prior to crosslinking, a polyolefin and peroxide which is in an amount of less than 35 mmol -O-O-/kg polymer composition, characterized in that the crosslinked polymer composition has been in a direct contact with a semiconductive composition for 24h at 70°C, and that the crosslinked polymer composition thereafter has an electrical DC-conductivity of 150 fS/m or less, wherein the electrical DC-conductivity is measured in accordance with "DC conductivity method", as described under "Determination methods", on a plaque of the crosslinked polymer composition at 70°C and 30 kV/mm mean electric field from a non-degassed and 1 mm thick plaque sample of the crosslinked polymer composition; a layered structure, cable, e.g. a power cable, use of the crosslinked polymer composition and the structured layer, both, for producing a crosslinked power cable, e.g., a crosslinked direct current (DC) power cable; and a process for producing a cable.

Polymer composition for w&c application with advantageous electrical properties

The invention relates to a use of a polymer composition with improved DC electrical properties in a power cable layer and to a cable surrounded by at least one layer comprising the polymer composition.

Polyethylene polymer composition and power cable with improved electrical properties

The present invention relates the a power cable with at least three layers, an inner semiconductive layer, an insulation layer, and an outer semiconductive layer, wherein at least the insulation layer comprises a new polymer composition to achieve minimisation of conductivity of the insulating layer. The present invention also relates to the process of producing the power cable and the polymer composition, and the use thereof in wire and cable applications.

Polymer composition for w&c application with advantageous electrical properties

The invention relates to a polymer composition with improved DC electrical properties, to the use of the composition for producing a cable layer and to a cable surrounded by at least one layer comprising the polymer composition.

Polymer composition for w&c application with advantageous electrical properties

The invention relates to a direct current power cable comprising a conductor surrounded by at least by an inner semiconductive layer which comprises a first semiconductive composition, an insulation layer and an outer semiconductive layer which comprises a second semiconductive composition, in that order, wherein at least the insulation layer consists of a non-crosslinked polymer composition. The invention also relates to the use of the non-crosslinked polymer composition to produce the power cable and the process thereof.

Crosslinkable polymer composition and cable with advantageous electrical properties

The invention relates to a polymer composition with improved DC electrical properties and to a cable surrounded by at least one layer comprising the polymer composition.

Polymer composition for cable applications with advantageous electrical properties

Power cable

A crosslinked low mfr polymer composition, power cable insulation and power cable

The present invention relates to a crosslinked polymer composition, which is obtained by crosslinking a polymer composition, which polymer composition has a melt flow rate (MFR) of less than 1.7 and comprises a polyolefm, peroxide and sulphur containing antioxidant, characterised by that the crosslinked polymer composition has an Oxidation Induction Time, determined according to ASTM-D3895, ISO/CD 11357 and EN 728 using a Differential Scanning Calorimeter (DSC), which Oxidation Induction Time corresponds to Z minutes, and comprises an amount of peroxide by-products which corresponds to W ppm determined according to BTM2222 using HPLC, wherein Z1 = Z = Z2, W1 = W = W2, and W= p - 270 * Z, wherein Z1 is 0, Z2 is 60, W1 is 0 and W2 is 9500, and p is 18500; and use thereof, a power cable insulation and a power cable, useful in high voltage (HV) and extra high voltage (EHV) cable applications direct current (DC) applications.

A new crosslinked polymer composition, structured layer and cable

A new low mfr polymer composition, power cable insulation and power cable

The present invention relates to a polymer composition comprising a polyolefin, peroxide and a sulphur containing antioxidant, wherein said peroxide is present in an amount which corresponds to X mmol -O-O-/kg polymer composition and said sulphur containing antioxidant is present in an amount which corresponds to Y mmol -OH /kg polymer composition, wherein Y1 = Y = Y2, X = 45 and 0.9 * Y + m = X = n - k * Y, wherein Y1 is 0.50 and Y2 is 10, and m is 0.8, n is 70 and k is 4.7; and wherein said polymer composition has a melt flow rate (MFR) of less than 1.7, and said polymer composition comprises less than 0.05 % by weight (wt%) 2,4-Diphenyl-4-methyl-1-pentene; a crosslinked polymer composition, and use thereof, a power cable insulation, a power cable, useful in high voltage (HV DC) and extra high voltage (EHV DC) direct current applications, and a method for reducing electrical conductivity of a crosslinked polymer composition.

Polymer composition for w&c application with advantageous electrical properties

The invention relates to a use of a polymer composition with improved DC electrical properties in a power cable layer and to a cable surrounded by at least one layer comprising the polymer composition.

A new polymer composition, power cable insulation and power cable

The present invention relates to a polymer composition comprising a polyolefin, peroxide and a sulphur containing antioxidant, wherein said peroxide is present in an amount which corresponds to X mmol -0-0-/kg polymer composition and said sulphur containing antioxidant is present in an amount which corresponds to Y mmol -OH /kg polymer composition, wherein Y 1 ≤ Y ≤ Y 2 , X ≤ 45 and 0.9 * Y + m ≤ X ≤ n - k * Y, wherein Y 1 is 0.50 and Y 2 is 10, and m is 0.8, n is 70 and k is 4.7; and wherein said polymer composition has a melt flow rate (MFR) which is at least 1.7, and said polymer composition comprises less than 0.05 % by weight (wt%) 2,4-Diphenyl-4-methyl-1-pentene; a crosslinked polymer composition, and use thereof, a power cable insulation, a power cable, useful in high voltage (HV DC) and extra high voltage (EHV DC) direct current applications, and a method for reducing electrical conductivity of a crosslinked polymer composition.

A new crosslinked polymer composition, power cable insulation and power cable

Polymer composition for w&c application with advantageous electrical properties

The invention relates to a use of a polymer composition with improved DC electrical properties in a power cable layer and to a cable surrounded by at least one layer comprising the polymer composition.

polymer composition for f & c application with advantageous electrical properties

composição de polímero para aplicação f&c com propriedades elétricas vantajosas. a presente invenção refere-se ao uso da composição de polímero com propriedade elétricas cc aperfeiçoadas em uma camada de cabo de alimentação e em um cabo envolvido por pelo menos uma camada que compreende a composição de polímero. polymer composition for f & c application with advantageous electrical properties. The present invention relates to the use of the improved dc electrical property polymer composition in a power cord layer and in a cable surrounded by at least one layer comprising the polymer composition.

Polymer composition for electrical devices

POLYMERIC COMPOSITION, RETICULATED POLYMERIC COMPOSITION, ITS USES, INSULATION FOR POWER CORDS, POWER CORD AND METHOD TO OBTAIN LOW ELECTRICAL CONDUCTIVITY OF A RETICULATED POLYMER COMPOSITION

composição polimérica com baixo mfr, isolamento para cabos de alimentação e cabo de alimentação. a presente invenção refere-se a uma composição polimérica compreendendo uma poliolefina, peróxido e um antioxidante contendo enxofre, em que o referido peróxido está presente em uma quantidade que corresponde a x mmol de -o-o-/kg da composição polimérica e o referido antioxidante contendo enxofre está presente em uma quantidade que corresponde a y mmol de -oh /kg da composição polimérica, sendo que y1 (menor igual) y (menor igual) y2, x (menor igual) 45 e 0,9 * y + m (menor igual) x (menor igual) n - k * y, em que y1 é 0,50 e y2 é 10, e m é 0,8, n é 70 e k é 4,7; sendo que a referida composição polimérica possui um índice de fluidez (mfr) inferior a 1,7 e a referida composição polimérica compreende menos de 0,05% em peso (%p) de 2,4-difenil-4-metil-1-penteno; uma composição polimérica reticulada e o uso desta, um isolamento para cabo de alimentação, um cabo de alimentação, úteis em aplicações de corrente contínua em alta-tensão (hv dc) e em extra-alta-tensão (ehv dc) e um método para reduzir a condutividade elétrica de uma composição polimérica reticulada.

A new crosslinked polymer composition, power cable insulation and power cable.

La presente invención se refiere a una composición de polímero reticulado, la cual se obtiene por la reticulación de una composición de polímero, cuya composición de polímero tiene una tasa de flujo de fusión (MFR) de al menos 1.7 y comprende una poliolefina, peróxido y azufre que contiene antioxidante, caracterizado por que la composición de polímero reticulado tiene un Tiempo de Inducción de Oxidación, determinado de acuerdo con ASTM-D3895, ISO/CD 11357 y EN 728 usando un Calorímetro de Barrido Diferencial (DSC), cuyo Tiempo de Inducción de Oxidación corresponde a Z minutos, y comprende una cantidad de subproductos de peróxido que corresponden a W ppm determinado de acuerdo con BTM2222 usando HPLC, en donde Z1 = Z = Z2, W1 = W = W2, y W = p - 270 * Z, en donde Z1 es 0, Z2 es 60, W1 es 0 y W2 es 9500, y p es 18500.; y uso de los mismos, un aislamiento del cable de alimentación y un cable de alimentación, útil en aplicaciones de corriente continua de aplicaciones de cable de alto voltaje (HV) y extra alto voltaje (EHV).

Polyethylene with a high vinyl content and a low MFR

La invención se refiere a un polietileno que tiene un índice de fluidez a (2,16) kg de carga (MFR 2), determinado según el método ISO1133-1:2011, cuyo MFR 2 es A g/10 min y A1 <= A <= A 2; donde A1 es (0.5) y A 2 es (1.70), y que contiene una cantidad total de grupos vinilo que es B grupos vinilo por (1000) átomos de carbono, y B1 <= B, donde B1 es (0.45), determinada según el método ASTM D6248-98, una composición polimérica, siendo un artículo, por ejemplo, un cable, por ejemplo, un cable de alimentación, y procesos para producir un polietileno, una composición polimérica y un artículo, y un artículo; útil en diferentes aplicaciones finales, como aplicaciones de alambre y cable (W&C). (Traducción automática con Google Translate, sin valor legal) The invention relates to a polyethylene having a fluidity index at (2.16) kg load (MFR 2), determined according to the ISO1133-1:2011 method, whose MFR 2 is A g/10 min and A1 <= A <= A 2; where A1 is (0.5) and A 2 is (1.70), and containing a total number of vinyl groups that is B vinyl groups per (1000) carbon atoms, and B1 <= B, where B1 is (0.45), determined according to the method ASTM D6248-98, a polymeric composition, an article being, for example, a cable, for example, a power cable, and processes for producing a polyethylene, a polymeric composition and an article, and an article; useful in different end applications such as wire and cable (W&C) applications. (Automatic translation with Google Translate, without legal value)

Polymer composition for electrical devices

The invention relates to a polymer composition with improved electrical properties and to a use thereof preferably in electrical devices, as well as to a cable surrounded by at least one layer comprising the polymer composition.

Electric power cable and a process for the production of the power cable

An electric power cable and a process for the production of the cable including a metal conductor and an electric insulation system surrounding the conductor coaxially and radially outwards of the conductor having improved electric properties. The insulation system includes an inner semi-conducting layer surrounded radially outwards by an insulation layer and wherein the insulation layer is surrounded radially outwards by an outer semi-conducting layer. The electric power cable further includes an inner water blocking material arranged in the conductor and/or to surround the conductor radially outwards and an outer water blocking material arranged radially outwards from the insulation system. An inner barrier layer is arranged as a diffusion hindering layer between the inner water blocking material and the insulation system and an outer barrier layer is arranged as a diffusion hindering layer between the insulation system and the outer water blocking material.