Process for polymerization of ethylene, and ethylene polymers having broad molecular weight distribution and long- chain branching

The present invention relates to new ethylene polymers having broad molecular weight distribution and long-chain branching, above all at high molecular weight fractions, wherein the polymers have strain hardening equal or higher than 1.4 (at constant elongational rate of 0.5s-1, at 150 DEG C), branching index g' equal or lower than 0.9 (at Mw of 2106 g/mol). The polymers are prepared by using a mixed catalyst system comprising a polymerization catalyst based on a late transition metal component having a tridentate ligand, and a Ziegler polymerization catalyst annealed at a temperature higher than 100 DEG C, for a time of at least 10 minutes.

Polyethylene polymerisation in gas phase reactor

A novel gas phase polymerisation method is devised, for polymerisation of low and ultralow density polyethylene.

Polyethylene of raised temperature resistance

The present disclosure relates to a polyethylene composition of Raised Temperature Resistance, having the following features: 1) a density from 0.935 to 0.945 g/cm3; 2) a melt flow index MIF from 10 to 18 g/10 min; 3) a melt flow index MIP from 1 to 2.5 g/10 min; and 4) a MIF/MIP ratio from 5 to 10.

POLYETHYLENE FOR INJECTION MOLDING

The present disclosure relates to a polyethylene composition comprising copolymers of ethylene with 1-alkenes, or mixtures of ethylene homopolymers and said copolymers of ethylene with 1-alkenes, wherein the polyethylene composition has a molar mass distribution width (MWD) M/Mof from 7 to 15, a density of from 0.942 to 0.954 g/cm, a weight average molar mass Mof from 20,000 g/mol to 500,000 g/mol, a MIE of from 1.0 to 3.0 g/10 min, a MIF of from 100 to 200 g/10 min, and a ratio MIF/MIE of from 40 to 50. 1. A polyethylene composition comprising copolymers of ethylene with 1-alkenes , or mixtures of ethylene homopolymers and copolymers of ethylene with 1-alkenes , wherein the polyethylene composition has a molar mass distribution width (MWD) M/Mof from 7 to 15 , a density of from 0.942 to 0.954 g/cm , determined according to ISO 1183 at 23° C. , a weight average molar mass Mof from 20 ,000 g/mol to 500 ,000 g/mol , a MIE of from 1.0 to 3.0 g/10 min , a MIF of from 100 to 200 g/10 min , and a ratio MIF/MIE of from 40 to 50 , where MIE is the melt flow rate at 190° C. with a load of 2.16 kg and MIF is the melt flow rate at 190° C. with a load of 21.6 kg , both determined according to ISO 1133.2. The polyethylene composition of claim 1 , comprising 0.7 to 20 CH/1000 carbon atoms as determined by C-NMR.3. The polyethylene composition of claim 1 , comprising at least one C-C-alpha-olefin monomer species in an amount greater than 3.5% by weight based on the total weight of the polyethylene composition.4. The polyethylene composition of claim 1 , comprising a vinyl group content of at least 0.6 vinyl groups/1000 C atoms claim 1 , and wherein the amount of the polyethylene composition with a molar mass of below 10g/mol claim 1 , as determined by GPC claim 1 , is above 95.5% by weight claim 1 , based on the total weight of the polyethylene.5. The polyethylene composition of claim 1 , comprising a η(vis) value of from 0.3 to 7 dl/g claim 1 , wherein η(vis) is the intrinsic ...

High pressure LDPE for medical applications

A novel LDPE from radical, high pressure polymerization is devised.

Polyethylene for injection molding

The present disclosure relates to a polyethylene composition comprising copolymers of ethylene with 1-alkenes, or mixtures of ethylene homopolymers and said copolymers of ethylene with 1-alkenes, wherein the polyethylene composition has a molar mass distribution width (MWD) M w /M n of from 7 to 15, a density of from 0.942 to 0.954 g/cm 3 , a weight average molar mass M w of from 20,000 g/mol to 500,000 g/mol, a MIE of from 1.0 to 3.0 g/10 min, a MIF of from 100 to 200 g/10 min, and a ratio MIF/MIE of from 40 to 50.

Process for the preparation of ethylene copolymers in the presence of free-adical polymerization initiator by copolymerizing ethylene, a bi-or multifunctional comonomer and optionally further comonomers

Provided is a process for preparing ethylene copolymers in the presence of free-radical polymerization initiator at pressures in the range of from 160 MPa to 350 MPa and temperatures in the range of from 100 DEG C to 350 DEG C in a tubular reactor, by copolymerizing ethylene, a bi-or multifunctional comonomer and optionally further comonomers, wherein the bi-or multifunctional comonomer bears at least two different functional groups, of which at least one is a unsaturated group, which can be incorporated into the growing polymer chain, and at least another functional group can act as chain transfer agent in radical ethylene polymerization. And ethylene copolymers obtainable by such a process, the use of the ethylene copolymers for extrusion coating and a process for extrusion coating a substrate selected from the group consisting of paper, paperboard, polymeric film, and metal, with such ethylene copolymers, are also provided.

Impact resistant LLDPE composition and films made thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

LOW DENSITY POLYETHYLENE WITH HIGH ELONGATION HARDENING

The present disclosure provides a low density polyethylene (LDPE) having (A) a density from 0.910 to 0.924 g/cm, determined according to ISO 1183 at 23° C.; (B) an elongational hardening of at least 4.2, at 150° C. at an elongational rate of 1 s; (C) a ratio Mw/Mn of at least 18, where (i) Mw is the weight average molar mass, measured by a MALLS detector coupled to a GPC, and (ii) Mn is the number average molar mass, measured by GPC (Gel Permeation Chromatography); and (D) a Mw of at least 230,000 g/mol. The present disclosure also provides an article of manufacture made from or containing (A) a substrate and (B) a coating layer made from or containing the disclosed LDPE. The present disclosure further provides a polymerization process occurring (A) in the presence of oxygen as the only radical initiating agent and (B) in the absence of solvents. 1. A low density polyethylene comprising:{'sup': '3', 'A) a density from about 0.910 to about 0.924 g/cm, determined according to ISO 1183 at 23° C.;'}{'sup': '−1', 'B) an elongational hardening of at least about 4.2, at 150° C. at an elongational rate of 1 s;'} (i) Mw is the weight average molar mass, measured by a MALLS detector coupled to a GPC, and', '(ii) Mn is the number average molar mass, measured by GPC (Gel Permeation Chromatography); and, 'C) a ratio Mw/Mn of at least about 18, where'}D) a Mw of at least about 230,000 g/mol.2. The low density polyethylene of claim 1 , being selected from the group consisting of ethylene homopolymers claim 1 , ethylene copolymers and mixtures thereof.3. The low density polyethylene of claim 1 , further an elongational hardending of at least about 4.5 claim 1 , at 150° C. at an elongational rate of 5 s.4. The low density polyethylene of claim 1 , further comprising a gpcBR value of at least about 1.5.5. The low density polyethylene of claim 1 , further comprising a melt flow rate (MFR) according to ISO 1133 (190° C. claim 1 , 2.16 kg) in the range from about 1.5 to about 15 g/10 ...

POLYETHYLENE OF RAISED TEMPERATURE RESISTANCE

The present disclosure relates to a polyethylene composition of Raised Temperature Resistance, having the following features: 1. A polyethylene composition comprising:{'sup': '3', '1) density from 0.935 to 0.945 g/cm, determined according to ISO 1183 at 23° C.;'}2) a melt flow index MIF at 190° C. with a load of 21.60 kg, determined according to ISO 113, from 10 to 18 g/10 min;3) a melt flow index MIP at 190° C. with a load of 5 kg, determined according to ISO 113, from 1 to 2.5 g/10 min; and4) a MIF/MIP ratio from 5 to 10.2. The polyethylene composition of claim 1 , further comprising one or more of the following features:{'sub': w', 'r', 'w', 'n, '5) M/Mratio, where Mis the weight average molar mass and Mis the number average molar mass, both measured by GPC (Gel Permeation Chromatography) of 4 or more;'}6) an intrinsic viscosity [η], determined according to ISO 1628-1 and -3 in decalin at 135° C. by capillary viscosity measurement, from 1.8 to 2.8 dl/g;7) a substantially linear chain structure;8) a content of vinyl groups, determined by means of infrared (IR) analysis in accordance with ASTM D 6248-98, of from 0.3 to 0.7 vinyl groups/1000 carbon atoms; and{'sub': '7', '9) a content of vinyl groups in the polymer fraction having an intrinsic viscosity [η] of less than 0.5 dl/gand of more than 0.3 vinyl groups/1000 carbon atoms.'}3. The polyethylene composition of claim 2 , wherein the content of vinyl groups in the polymer fraction having an intrinsic viscosity [η] of less than 0.5 dl/g and of more than from 0.4 to 0.9 vinyl groups/1000 carbon atoms.4. The polyethylene composition of claim 1 , prepared by using in polymerization a catalyst composition comprising at least two different single-site polymerization catalysts A) and B) claim 1 , of which A) is at least one metallocene polymerization catalyst and B) is at least one polymerization catalyst based on a non-metallocene transition metal complex.5. The polyethylene composition of claim 2 , prepared by using ...

Polyethylene composition having high stress cracking resistance

A polyethylene composition made from or containing a polyethylene, having the following features: 1) a density from about 0.930 to about 0.945 g/cm 3 , determined according to ISO 1183 at 23° C.; 2) a ratio of MIF/MIP from about 30 to about 55; 3) a MIF from about 3 to about 25 g/10 min.; 4) a Mz equal to or greater than about 1,500,000 g/mol; and 5) a long-chain branching index, LCBI, equal to or lower than about 0.55, wherein the LCBI is the ratio of the measured mean-square radius of gyration R g , measured by GPC-MALLS, to the mean-square radius of gyration for a linear PE having about the same molecular weight of 1,000,000 g/mol.

Impact resistant LLDPE composition and films made thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

Polymerization process in the presence of antistatic agent

A process for preparing a polyolefin, including polymerizing olefins in the presence of an antistatic agent made from or containing an alkylene oxide derived polymer made from or containing in average from about 10 to about 200 repeating units —(CH 2 —CHR—O)— with R being hydrogen or an alkyl group having from 1 to 6 carbon atoms, wherein the alkylene oxide derived polymer is a random copolymer of ethylene oxide and other alkylene oxides and a ratio of n:m is in the range of from 6:1 to 1:1, wherein (n) is the average number of repeating units —(CH 2 —CH 2 —O)— derived from ethylene oxide and (m) is the average number of repeating units —(CH 2 —CHR′—O)— derived from the other alkylene oxides with R′ being an alkyl group having from 1 to 6 carbon atoms, and the end groups of the alkylene oxide derived polymer are —OH groups.

Process for preparing ethylene homopolymers or copolymers in a tubular reactor with at least two reaction zones having different concentrations of chain transfer agent

Process for preparing ethylene homopolymers or copolymers in the presence of free-radical polymerization initiator and at least one chain transfer agent at pressures in the range of from 110 MPa to 350 MPa and temperatures in the range of from 100 DEG C to 350 DEG C in a tubular reactor with at least two reaction zones having different concentrations of the chain transfer agent, wherein the concentration of the chain transfer agent in the first reaction zone is less than 70% of the concentration of the chain transfer agent in the reaction zone with the highest concentration of the chain transfer agent, ethylene homopolymers or copolymers obtainable by such a process,the use of the ethylene homopolymers or copolymers for extrusion coating and a process for extrusion coating a substrate selected from the group consisting of paper, paperboard, polymeric film, and metal, with such ethylene homopolymers or copolymers.

Polyethylene for Rotomoulding

A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles. 1. A polyethylene homo- and/or copolymer , wherein the copolymer is a copolymer of ethylene with C-C-alkene , the polyethylene having a molar mass distribution width M/Mfrom 7 to 15 , a density from 0.938 to 0.942 g/cm , a weight average molar mass Mfrom 20 ,000 g/mol to 500 ,000 g/mol , and a melt flow rate (MI , at 2.16 kg) from 4 to 5.5 g/10 min.2. The polyethylene according to claim 1 , wherein the polyethylene comprises homopolymeric and copolymeric subfractions claim 1 , and wherein said polyethylene taken as a whole has from 0.7 to 20 CH/1000 carbon atoms as determined by NMR.3. The polyethylene according to claim 1 , wherein said polyethylene comprises at least one C-C-alkene monomer species in an amount of >3% based on the total weight of said polyethylene.4. The polyethylene according to claim 1 , wherein the polyethylene has a vinyl group content of at least 0.6 vinyl groups/1000 C atoms.5. The composition according to claim 1 , wherein the η(vis) value is 0.3 to 7 dl/g as determined according to ISO 1628-1 and −3 in Decalin at 135° C.6. The polyethylene according to claim 1 , wherein the polyethylene has been prepared in one polymerization step in a single reactor by a mixed catalyst system comprising at least one metallocene.7. The polyethylene according to claim 1 , wherein the polyethylene is obtained by polymerization in the presence of a catalyst composition comprising at least two different single-site polymerization catalysts.8. The polyethylene according to claim 7 , wherein the polyethylene is obtained by copolymerizing ethylene with at least one 1-alkene of formula RCH═CH claim 7 , wherein Ris hydrogen or an alkyl radical with 1 to 10 carbons claim 7 , at a temperature from 20 to 200° C. and at a pressure from 0.05 to 1 MPa.9. The polyethylene according to claim 3 , wherein the C-C-alkene is a C-C-1-alkene.10. The polyethylene ...

Polyethylene for Rotomoulding

A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles.

HIGH PRESSURE LDPE FOR MEDICAL APPLICATIONS

A novel LDPE from radical, high pressure polymerization is devised. 1. A low density polyethylene (LDPE) obtained by radical polymerisation of ethylene , wherein the LDPE is a homopolymer , having a density of at least 0.932 g/cm , and a molecular weight distribution Mw/Mn of from 3 to 10 or of from 6 to 15 , and an MI (190° C./2.16 kg) of >0.45 g/10 min.2. The LDPE according to claim 1 , wherein a chain transfer agent comprising a Cto Caldehyde is used during the radical polymerisation.3. The LDPE according to claim 1 , wherein the density of the LDPE is from 0.932 to 0.936 g/cm.4. The LDPE according to claim 1 , wherein the LDPE has a melting temperature >118° C. in DSC measured according to ISO 11357-3 (1999).5. The LDPE according to claim 1 , wherein the LDPE has an E-modulus of at least 470 Mpa.6. The LDPE according to claim 1 , wherein the LDPE has an Mw of from 60 claim 1 ,000 to 130 claim 1 ,000 g/mol.7. The LDPE according to claim 4 , wherein the LDPE has one 2heat of melting peak temperature (Tm2) in a temperature range of from 118° C. to 122° C.8. The LDPE according to claim 1 , wherein the LDPE is a homopolymer which has been radically polymerized in the presence of a tert.-butylester of branched C4 to C15 alkanoic peracids claim 1 , and propanal claim 1 , and in the absence of an amount of oxygen effective for making oxygen an initiator.9. A process for manufacturing the LDPE of by high-pressure polymerization of ethylene claim 1 , the process comprising:i.) adding to a tubular reactor having at least two consecutive reactor zones as defined by the number of reagent inlets available, at the first inlet for the first reactor zone a peroxide mixture comprising at least one first peroxide having a half-time of decay of <0.1 hr at 105° C. in chlorobenzene and further comprising at least one second peroxide having a half-time of decay of >0.1 hr at 105° C. in chlorobenzene,ii.) adding to said reactor at the second inlet, and at any further inlet available, a ...

Polyethylene Composition And Method For Obtaining Same

New plastomer material for use in automotive parts such as bumpers is devised here, which is a novel polyethylene produced by a gas phase process. 1. A polyethylene copolymer composition , having a density of from 0.880 to 0.912 g/cm , a Mw/Mn of 51.6 dL/g , said copolymer composition having a high temperature melting peak in DSC (Tm2) at a temperature of from 126 to 131° C. , and comprising at least one C4-C12-α-olefine comonomer.2. The polyethylene composition of claim 1 , wherein the polyethylene composition has been produced in a single polymerization step in a gas phase reactor.3. The polyethylene composition of claim 1 , wherein the polyethylene composition has been produced in the presence of a mixed catalyst system comprising at least one metallocene.4. The polyethylene composition of claim 3 , wherein the polyethylene has been produced in the presence of at least one metallocene A) and at least one further non-metallocene claim 3 , non-Ziegler claim 3 , metallorganic transition metal complex catalyst B).5. The polyethylene composition according to claim 1 , wherein the composition has at least two claim 1 , peaks in DSC (Tm2) claim 1 , a first at high temperature of from 126.5 to 130° C. claim 1 , and a second at lower temperature of from 65 to 95° C.6. The polyethylene composition of claim 1 , wherein the polyethylene composition is at least bimodal claim 1 , in comonomer distribution as determined by DSC analysis claim 1 , and/or wherein the composition has a CDBI of <65%.7. The polyethylene composition of wherein the HDPE weight fraction of the polyethylene composition is from 5 to 40% (w/w) claim 1 , and said HDPE weight fraction corresponds to polymer found in the DSC curve at temperatures above the temperature of a local minimum of the DSC curve in between 105 to 112° C.8. The polyethylene composition according to claim 1 , wherein in ...

Process for the Preparation of Ethylene Copolymers in the Presence of Free-Radical Polymerization Initiator by Copolymerizing Ethylene, a Bi- or Multifunctional Comonomer and Optionally Further Comonomers

Process for preparing ethylene copolymers in the presence of free-radical polymerization initiator at pressures in the range of from 160 MPa to 350 MPa and temperatures in the range of from 100° C. to 350° C. in a tubular reactor by copolymerizing ethylene, a bi- or multifunctional comonomer and optionally further comonomers, wherein the bi- or multifunctional comonomer bears at least two different functional groups, of which at least one is a unsaturated group, which can be incorporated into the growing polymer chain, and at least another functional group can act as chain transfer agent in radical ethylene polymerization, ethylene copolymers obtainable by such a process, the use of the ethylene copolymers for extrusion coating and a process for extrusion coating a substrate selected from the group consisting of paper, paperboard, polymeric film, and metal, with such ethylene copolymers.

POLYETHYLENE POLYMERISATION IN GAS PHASE REACTOR

A novel gas phase polymerisation method is devised, for polymerisation of low and ultralow density polyethylene. 1. Method of polymerising a polyethylene copolymer composition , having a density of from 0.870 to 0.920 g/cm3 , said copolymer composition comprising at least one C4-C12-α-olefine comonomer , preferably at least one linear C4-C7-1-alkene , most preferably comprising 1-butene and/or 1-hexene , said copolymer composition being at least bimodal in comonomer distribution as determined by DSC analysis and which process comprises the step of polymerizing the polyethylene composition in a single polymerization step in a gas phase reactor.2. Method of claim 1 , wherein the gas velocity in the reactor during the polymerisation is of from 6 m/s-10 m/s claim 1 , the ethylene concentration is <45% (v/v) claim 1 , the total comonomer concentration is <10% (v/v) claim 1 , the catalyst mileage is >3000 g/g solid catalyst and wherein the final polyethylene composition has a density of <0.905 g/cm3 and a MI (190 oC/2.16 kg) of from 0.5 to 3.3. The method of claim 1 , wherein during the polymerisation the inert gas fraction is >50 Vol.-% (v/v) claim 1 , the ethylene concentration is <45% (v/v) and wherein the reactor polymerisation temperature is <85 oC claim 1 , preferably wherein in the temperature is set at a sintering temperature <75 oC of the polymer particles to be obtained.4. The method of claim 1 , wherein the polyethylene composition has been produced in the presence of a mixed catalyst system made up from at least one metallocene A) and from at least one further non-metallocene claim 1 , metallorganic claim 1 , mono- or binuclear transition metal complex catalyst B).5. The method of claim 1 , wherein the polyethylene composition is bimodal in comonomer distribution as determined by DSC analysis claim 1 , and/or wherein the composition has a CDBI of <65% as determined by analytical TREF.6. The method of claim 1 , wherein the HDPE weight fraction of the ...

PROCESS FOR PREPARING ETHYLENE HOMOPOLYMERS OR COPOLYMERS IN A TUBULAR REACTOR WITH AT LEAST TWO REACTION ZONES HAVING DIFFERENT CONCENTRATIONS OF CHAIN TRANSFER AGENT

Process for preparing ethylene homopolymers or copolymers in the presence of free-radical polymerization initiator and at least one chain transfer agent at pressures in the range of from 110 MPa to 350 MPa and temperatures in the range of from 100° C. to 350° C. in a tubular reactor with at least two reaction zones having different concentrations of the chain transfer agent, wherein the concentration of the chain transfer agent in the first reaction zone is less than 70% of the concentration of the chain transfer agent in the reaction zone with the highest concentration of the chain transfer agent, ethylene homopolymers or copolymers obtainable by such a process, the use of the ethylene homopolymers or copolymers for extrusion coating and a process for extrusion coating a substrate selected from the group consisting of paper, paperboard, polymeric film, and metal, with such ethylene homopolymers or copolymers. 1. A process for preparing ethylene homopolymers or ethylene copolymers comprising the step of:(i) polymerizing ethylene or ethylene copolymers in the presence of a free-radical polymerization initiator and at least one chain transfer agent at pressures in the range of from 110 MPa to 350 MPa and temperatures in the range of from 100° C. to 350° C. in a tubular reactor with at least two reaction zones having different concentrations of the chain transfer agent, wherein the concentration of the chain transfer agent in the first reaction zone is less than 70% of the concentration of the chain transfer agent in the reaction zone with the highest concentration of the chain transfer agent.2. The process of claim 1 , wherein no fresh chain transfer agent is added to the first reaction zone.3. The process of claim 1 , wherein the polymerization in the first reaction zone is carried out in the absence of the chain transfer agent.4. The process of claim 1 , in which the non-polymerized components of the reaction mixture leaving the reactor are separated from obtained ...

POLYMERIZATION PROCESS IN THE PRESENCE OF ANTISTATIC AGENT

A process for preparing a polyolefin, including polymerizing olefins in the presence of an antistatic agent made from or containing an alkylene oxide derived polymer made from or containing in average from about 10 to about 200 repeating units —(CH—CHR—O)— with R being hydrogen or an alkyl group having from 1 to 6 carbon atoms, wherein the alkylene oxide derived polymer is a random copolymer of ethylene oxide and other alkylene oxides and a ratio of n:m is in the range of from 6:1 to 1:1, wherein (n) is the average number of repeating units —(CH—CH—O)— derived from ethylene oxide and (m) is the average number of repeating units —(CH—CHR′—O)— derived from the other alkylene oxides with R′ being an alkyl group having from 1 to 6 carbon atoms, and the end groups of the alkylene oxide derived polymer are —OH groups. 1. A process for preparing a polyolefin comprising:a polymerizing olefins at temperatures of from about 20 to about 200° C. and pressures of from about 0.1 to 20 MPa in the presence of a polymerization catalyst in a polymerization reactor, {'sub': '2', 'claim-text': wherein the alkylene oxide derived polymer comprises', '(1) a random copolymer of ethylene oxide and other alkylene oxides and', '(2) a ratio of n:m in the range of from 6:1 to 1:1,', {'sub': 2', '2', '2, 'wherein n is the average number of repeating units of the formula —(CH—CH—O)— derived from ethylene oxide and m is the average number of repeating units —(CH—CHR′—O)— derived from the other alkylene oxides, wherein R′ comprises an alkyl group having from 1 to 6 carbon atoms and end groups of the alkylene oxide derived polymer are —OH groups.'}], '(A) an average of 10 to 200 repeating units of the formula —(CH—CHR—O)—, with R being hydrogen or an alkyl group having from 1 to 6 carbon atoms,'}, '(i) an alkylene oxide derived polymer comprising'}, 'wherein the polymerization is carried out in the presence of an antistatic agent comprising'}2. The process of claim 1 , wherein the ratio of n:m is in ...

POLYETHYLENE COMPOSITION HAVING HIGH STRESS CRACKING RESISTANCE

A polyethylene composition made from or containing a polyethylene, having the following features: 1. A polyethylene composition comprising:A) a polyethylene having the properties of{'sup': '3', '1) density from about 0.930 to about 0.945 g/cm, determined according to ISO 1183 at 23° C.;'}2) a ratio of MIF/MIP from about 10 to less than about 30, where MIF is the melt flow index at 190° C. with a load of 21.60 kg, and MIP is the melt flow index at 190° C. with a load of 5 kg, both determined according to ISO 1133;3) a MIF from about 3 to about 25 g/10 min;4) a Mz equal to or greater than 1,500,000 g/mol, measured by GPC-MALLS (Gel Permeation Chromatography coupled with Multi-angle laser-light scattering); and5) a long-chain branching index, LCBI, equal to or lower than about 0.55 at a molecular weight of 1,000,000 g/mol,{'sub': 'g', 'wherein LCBI is the ratio of the measured mean-square radius of gyration R, measured by GPC-MALLS, to the mean-square radius of gyration for a linear PE having the same molecular weight.'}2. The polyethylene composition of claim 1 , wherein the polyethylene has a Mw equal to or higher than about 300 claim 1 ,000 g/mol.3. The polyethylene composition of claim 1 , wherein the polyethylene comprises an ethylene copolymer.4. The polyethylene composition of claim 1 , wherein the polyethylene is prepared by process using a Ziegler-Natta polymerization catalyst.5. The polyethylene composition of claim 4 , wherein the Ziegler-Natta polymerization catalyst comprises a product of a reaction between:{'sub': 2', '2, 'a) a solid catalyst component comprising a Ti compound supported on MgCl, obtained by contacting the titanium compound with the MgCl, or a precursor Mg compound, optionally in the presence of an inert medium, at a temperature from 130 to 150° C.;'}b) an organo-Al compound; and optionally c) an external electron donor compound.6. The polyethylene composition of claim 1 , wherein the polyethylene has a property selected from the group ...

POLYETHYLENE COMPOSITION HAVING HIGH STRESS CRACKING RESISTANCE

A polyethylene composition made from or containing a polyethylene, having the following features: 2. The polyethylene composition of claim 1 , wherein the polyethyelene has a Mw equal to or higher than about 300 claim 1 ,000 g/mol.3. The polyethylene composition of claim 1 , wherein the polyethylene comprises an ethylene copolymer.4. The polyethylene composition of claim 1 , wherein the polyethylene is prepared by a process using a Ziegler-Natta polymerization catalyst.5. The polyethylene composition of claim 4 , wherein the Ziegler-Natta polymerization catalyst comprises a product of a reaction between:{'sub': 2', '2, 'a) a solid catalyst component comprising a Ti compound supported on MgCl, said component being obtained by contacting the titanium compound with the MgCl, or a precursor Mg compound, optionally in the presence of an inert medium, at a temperature from 130 to 150° C., in particular from 135 to 150° C.;'}b) an organo-Al compound; and optionallyc) an external electron donor compound.6. The polyethylene composition of claim 1 , wherein the polyethylene has a property selected from the group consisting of:a) a ratio of Mw/Mn from about 36 to about 48;b) a MIP in the range from about 0.05 to about 1.5 g/10 min.;{'sup': '−1', 'c) an elongational hardening at 0.5 s, T=150° C. of about 0.9 or higher;'}{'sup': '−1', 'd) an elongational hardening at 0.1 s, T=150° C. of about 0.9 or higher; and'}e) a comonomer content equal to or less than about 8% by weight, based upon the total weight of the polyethylene.7. The polyethylene composition of claim 1 , wherein the polyethylene comprises: [{'sup': '3', 'i) a density equal to or greater than about 0.945 g/cmand'}, 'ii) a melt flow index MIE at 190° C. with a load of 2.16 kg, according to ISO 1133, of about 1 about 25 g/10 min.; and, 'A) about 40 to about 60% by weight of an ethylene homopolymer or copolymer, based upon the total weight of the polyethylene, having'} 'i) a MIE value lower than the MIE value of ...

Adhesive polymer composition

A novel adhesive composition suitable for composing and multilayered coatings onto large, industrial equipement such as pipeline tubes is devised. The composition is a blend based on a polyethylene which determines the blend's favorable properties, which polyethylene itself can be used further in coating cables and for producing mouldings, especially rotomoulded articles.

Polyethylene copolymers

A multimodal ethylene copolymer having the following properties: i) density comprised in the range from 0.880 to 0.955 g/cm3; ii) total comonomer content ranging from 6% to 25% by weight; iii) content of 1-butene derived units ranging from 0 to 2% by weight; iv) Mw/Mn comprised from 4 to 20; v) intrinsic viscosity (decalin at 135°C as determined according to EN ISO 1628-312003) comprised between 1.0 and 4.0 dL/g; said multimodal ethylene copolymer comprises from 10% to 80% by weight of a first polyethylene component and being detected at the crystaf® apparatus at a temperature higher than 75°C and from 90% to 20% by weight of a second polyethylene component being a copolymer being detected at a crystaf® apparatus at a temperature lower than 75°C; wherein said multimodal ethylene copolymer being fractionated into 12 fractions by means of the Holtrup analysis, the fractions containing more than 2% by weight of the total amount of material meet the following relathionship: Cf/HDPE > -0.0075HDPE + 0.58; wherein Cf is the amount (%wt) of comonomer of formula CH 2 =CHT in the copolymer of the fraction and HDPE is the amount (%wt) of the homopolymer component present in the fraction.

Polymer composition

A polypropylene composition comprising: A) from 30% to 90% by weight of a propylene polymer composition comprising: a1) from 20% to 90% of a propylene homopolymer, or a copoloymer of propylene containing 3% or less of derived units of ethylene or C 4 -C 10 α-olefin(s) or of combinations thereof, said homopolymer or copolymer having a content of isotactic pentads (mmmm), measured by 13 C NMR on the fraction insoluble in xylene at 25 °C, higher than 96; a2) from 10% to 80%, of a copolymer of ethylene containing from 40% to 70% of derived units of propylene or C 4 -C 10 α-olefin(s) or of combinations thereof; B) from 10% to 70% by weight of a multimodal ethylene copolymer wherein the comonomer is selected from the derived units of alpha olefins of formula CH 2 =CHT wherein T is a C 3 -C 10 alkyl group; having the following properties: i) density (with ISO 1183) comprised in the range from 0.850 to 0.935 g/cm 3 ; ii) total comonomer content ranging from 6% to 30% by weight; iii) content of 1-butene derived units ranging from 0 to 2% by weight; iv) Mw/Mn comprised from 4 to 20; v) intrinsic viscosity (decalin at 135°C as determined according to EN IS0 1628-312003) comprised between 1.0 and 4.0 dL/g, and C) from 0 to 50 % by weight; preferably from 0 to 20% of a filler.

Polymerization process in the presence of antistatic agent

A process for the preparation of polyolefins, wherein the polymerization is carried out in the presence of an antistatic agent comprising an alkylene oxide derived polymer comprising in average from 10 to 200 repeating units -(CH 2 -CHR-O)- with R being hydrogen or an alkyl group having from 1 to 6 carbon atoms, wherein the alkylene oxide derived polymer is a random copolymer of ethylene oxide and other alkylene oxides and a ratio n : m of repeating units -(CH 2 -CH 2 -O)- derived from ethylene oxide to repeating units -(CH 2 -CHR'-O)- derived from the other alkylene oxides with R' being an alkyl group having from 1 to 6 carbon atoms is in the range of from 6 : 1 to 1 : 1, and all end groups of the alkylene oxide derived polymer are -OH groups.

Adhesive polymer composition

A novel adhesive composition suitable for composing multilayered coatings onto large, industrial equipment such as pipeline tubes is devised. The composition is a blend based on a polyethylene which determines the blend's favorable properties, which polyethylene itself can be used further in coating cables and for producing moldings, especially rotomoulded articles.

Polyethylene composition

New rotomouldings having superior FNCT are devised, based on the polyethylene suitably used. Further a novel subrange of polyethylene, suitable for such use and having optimum moulding behaviour, is devised.

Adhesive polymer composition

A novel adhesive composition suitable for composing multilayered coatings onto large, industrial equipment such as pipeline tubes is devised. The composition is a blend based on a polyethylene which determines the blend's favorable properties, which polyethylene itself can be used further in coating cables and for producing mouldings, especially rotomoulded articles.

Polymer composition

A polypropylene composition comprising: A) from 30% to 90% by weight of a propylene polymer composition comprising: a1) from 20% to 90% of a propylene homopolymer, or a copolymer of propylene containing 3% or less of derived units of ethylene or C 4 -C 10 α-olefin(s) or of combinations thereof, said homopolymer or copolymer having a content of isotactic pentads (mmmm), measured by 13 C NMR on the fraction insoluble in xylene at 25° C., higher than 96; a2) from 10% to 80%, of a copolymer of ethylene containing from 40% to 70% of derived units of propylene or C 4 -C 10 α-olefin(s) or of combinations thereof; B) from 10% to 70% by weight of a multimodal ethylene copolymer wherein the comonomer is selected from the derived units of alpha olefins of formula CH 2 ═CHT wherein T is a C 3 -C 10 alkyl group; having the following properties: i) density (with ISO 1183) comprised in the range from 0.850 to 0.935 g/cm 3 ; ii) total comonomer content ranging from 6% to 30% by weight; iii) content of 1-butene derived units ranging from 0 to 2% by weight; iv) Mw/Mn comprised from 4 to 20; v) intrinsic viscosity (decalin at 135° C. as determined according to EN IS0 1628-312003) comprised between 1.0 and 4.0 dL/g, and C) from 0 to 50% by weight; preferably from 0 to 20% of a filler.

Polyethylene Copolymers

A multimodal ethylene copolymer having the following properties: i) density comprised in the range from 0.880 to 0.955 g/cm3; ii) total comonomer content ranging from 6% to 25% by weight; iii) content of 1-butene derived units ranging from 0 to 2% by weight; iv) Mw/Mn comprised from 4 to 20; v) intrinsic viscosity (decalin at 135° C. as determined according to EN ISO 1628-312003) comprised between 1.0 and 4.0 dL/g; said multimodal ethylene copolymer comprises from 10% to 80% by weight of a first polyethylene component and being detected at the Crystaf® apparatus at a temperature higher than 75° C. and from 90% to 20% by weight of a second polyethylene component being a copolymer being detected at a Crystaf® apparatus at a temperature lower than 75° C.; wherein said multimodal ethylene copolymer being fractionated into 12 fractions by means of the Holtrup analysis, the fractions containing more than 2% by weight of the total amount of material meet the following relationship: Cf/HDPE >−0.0075 HDPE +0.58; wherein Cf is the amount (% wt) of comonomer of formula CH 2 ═CHT in the copolymer of the fraction and HDPE is the amount (% wt) of the homopolymer component present in the fraction.

Impact resistant LLDPE composition and films made thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

Impact resistant lldpe composition and films made thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

Polyethylene of raised temperature resistance

Impact resistant LLDPE composition and films made thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

Polyethylene for injection moldings

A polyethylene for IM having excellent processing properties in terms of spiral flow testing is devised.

Polyethylene for injection moulding

Polyethylene polymerisation in gas phase reactor

A novel gas phase polymerisation method is devised, for polymerisation of low and ultralow density polyethylene.

impact resistant lldpe composition and films made of it

Process for the polymerization of ethylene, and ethylene polymers having broad molecular weight distribution and long- chain branching

New ethylene polymers having broad molecular weight distribution and long-chain branching, above all at high molecular weight fractions; the polymers have strain hardening equal or higher than 1.4 (at constant elongational rate of 0.5s -1 , at 150°C), branching index g' equal or lower than 0.9 (at Mw of 2⋅10 6 g/mol). The polymers are prepared by using a mixed catalyst system comprising a polymerization catalyst based on a late transition metal component having a tridentate ligand, and a Ziegler polymerization catalyst annealed at a temperature higher than 100°C, for a time of at least 10 minutes.

Polyethylene composition

Polietileno de baja densidad de presion alta para aplicaciones medicas.

Un LDPE novedoso de polimerización de presión alta, de radicales es diseñado.

Polyethylene for rotomoulding

A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles

Polyethylene for rotomoulding

A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles.

Polymerization process in the presence of antistatic agent

High pressure LDPE for medical applications

A novel LDPE from radical, high pressure polymerization is devised.

High pressure LDPE, for medical applications

Polietileno de baja densidad (LDPE) obtenido mediante polimerización por radicales del etileno, y en donde, el LDPE, es un homopolímero, LDPE éste que tiene una densidad de por lo menos 0,932 g/cm3, o superior, y el cual tiene una distribución del peso molecular Mw/5 Mn correspondiente a un valor comprendido dentro de unos márgenes que van de 3 a 15, y que tiene un MI (190°C / 2,16 kg) de > 0,45 g / 10 minutos, hasta 1,5 g / 10 minutos. Low density polyethylene (LDPE) obtained by radical polymerization of ethylene, and wherein, LDPE is a homopolymer, LDPE which has a density of at least 0.932 g / cm3, or higher, and which has a distribution of the molecular weight Mw / 5 Mn corresponding to a value within a range of 3 to 15, and having an MI (190 ° C / 2.16 kg) of> 0.45 g / 10 minutes, up to 1 , 5 g / 10 minutes.

Process for the Polymerization of Ethylene, and Ethylene Polymers Having Broad Molecular Weight Distribution and Long-Chain Branching

New ethylene polymers having broad molecular weight distribution and long-chain branching, above all at high molecular weight fractions; the polymers have strain hardening equal or higher than 1.4 (at constant elongational rate of 0.5 s −1 , at 150° C.), branching index g′ equal or lower than 0.9 (at Mw of 2·10 6 g/mol). The polymers are prepared by using a mixed catalyst system comprising a polymerization catalyst based on a late transition metal component having a tridentate ligand, and a Ziegler polymerization catalyst annealed at a temperature higher than 100° C., for a time of at least 10 minutes.

Process for the polymerization of ethylene, and ethylene polymers having broad molecular weight distribution and long-chain branching

New ethylene polymers having broad molecular weight distribution and long-chain branching, above all at high molecular weight fractions; the polymers have strain hardening equal or higher than 1.4 (at constant elongational rate of 0.5 s −1 , at 150° C.), branching index g′ equal or lower than 0.9 (at Mw of 2·10 6 g/mol). The polymers are prepared by using a mixed catalyst system comprising a polymerization catalyst based on a late transition metal component having a tridentate ligand, and a Ziegler polymerization catalyst annealed at a temperature higher than 100° C., for a time of at least 10 minutes.

Impact Resistant LLDPE Composition and Films Made Thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

Polyethylene for rotomoulding

A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles.

Polyethylene composition having high stress cracking resistance

A polyethylene composition made from or containing a polyethylene, having the following features: 1) a density from about 0.930 to about 0.945 g/cm 3 , determined according to ISO 1183 at 23° C.; 2) a ratio of MIF/MIP from about 10 to less than about 30; 3) a MIF from about 3 to about 25 g/10 min.; 4) a Mz equal to or greater than about 1,500,000 g/mol; and 5) a long-chain branching index, LCBI, equal to or lower than about 0.55, wherein the LCBI is the ratio of the measured mean-square radius of gyration R g , measured by GPC-MALLS, to the mean-square radius of gyration for a linear PE having the about same molecular weight of 1,000,000 g/mol.

Polyethylene composition having high stress cracking resistance

A low density polyethylene particularly suited for extrusion coating, having the following features: 1) density from 0.930 to 0.945 g/cm3, determined according to ISO 1183 at 23°C; 2) ratio MIF/MIP from 10 to less than 30; 3) MIF from 3 to 25 g/10 min.; 4) Mz equal to or greater than 1,500,000 g/mol; 5) long-chain branching index, LCBI, equal to or lower than 0.55; wherein LCBI is the ratio of the measured mean-square radius of gyration Rg, measured by GPC-MALLS, to the mean-square radius of gyration for a linear PE having the same molecular weight.

Polyethylene composition having high stress cracking resistance

Impact Resistant LLDPE Composition and Films Made Thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

Impact resistant lldpe composition and films made thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

Polyethylene of raised temperature resistance

Polyethylene composition of Raised Temperature Resistance, having the following features: 1) density from 0.935 to 0.945 g/cm 3 ; 2) melt flow index MIF from 10 to 18 g/10 min; 3) melt flow index MIP from 1 to 2.5 g/10 min; 4) ratio MIF/MIP from 5 to 10.

Polyethylene for injection moldings

A polyethylene for IM having excellent processing properties in terms of spiral flow testing is devised.

Impact Resistant LLDPE Composition and Films Made Thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

Process for the polymerization of ethylene, and ethylene polymers having broad molecular weight distribution and long- chain branching

Adhesive polymer composition

A novel adhesive composition suitable for composing multilayered coatings onto large, industrial equipement such as pipeline tubes is devised. The composition is a blend based on a polyethylene which determines the blend' s favorable properties, which polyethylene itself can be used further in coating cables and for producing mouldings, especially rotomoulded articles.

Polyethylene polymerisation in gas phase reactor

A novel gas phase polymerization method is devised, for polymerization of low and ultralow density polyethylene.

Polyethylene for rotomoulding

A novel polyethylene is devised which polyethylene is particularyl advantageous for manufacturing rotomoulded articles.

Polyethylene for injection moulding

A polyethylene comprising copolymers of ethylene with 1-alkenes, or mixtures of ethylene homopolymers and said copolymers of ethylene with 1-alkenes, which polyethylene has molar mass distribution width (MWD) M w /M n of from 7 to 15, density of from 0.942 to 0.954 g/cm 3 , a weight average molar mass M w of from 20,000 g/mol to 500,000 g/mol, a MIE of from 1.0 to 3.0 g/10 min, a MIF of from 100 to 200 g/10 min, and a ratio MIF/MIE of from 40 to 50.

Polyethylene for rotomoulding

A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles.

Polyethylene composition and method for obtaining same

New plastomer material for use in automotive parts such as bumpers is devised here, which is a novel polyethylene produced by a gas phase process.

Impact resistant lldpe composition and films made thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

Process for preparing ethylene homopolymers or copolymers in a tubular reactor with at least two reaction zones having different concentrations of chain transfer agent

Impact Resistant LLDPE Composition and Films Made Thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

Process for preparing ethylene homopolymers or copolymers in a tubular reactor with at least two reaction zones having different concentrations of chain transfer agent

Process for preparing ethylene homopolymers or copolymers in the presence of free-radical polymerization initiator and at least one chain transfer agent at pressures in the range of from 110 MPa to 350 MPa and temperatures in the range of from 100°C to 350°C in a tubular reactor with at least two reaction zones having different concentrations of the chain transfer agent, wherein the concentration of the chain transfer agent in the first reaction zone is less than 70% of the concentration of the chain transfer agent in the reaction zone with the highest concentration of the chain transfer agent, ethylene homopolymers or copolymers obtainable by such a process,the use of the ethylene homopolymers or copolymers for extrusion coating and a process for extrusion coating a substrate selected from the group consisting of paper, paperboard, polymeric film, and metal, with such ethylene homopolymers or copolymers.

Process for preparing ethylene homopolymers or copolymers in a tubular reactor with at least two reaction zones having different concentrations of chain transfer agent

Impact resistant lldpe composition and films made thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

Composicion de polietileno lineal de baja densidad (lldpe) resistente a impactos y peliculas hechas de la misma.

Se elabora un material PE novedoso que exhibe propiedades mecánicas/ópticas y capacidad de procedimiento excelentes, por ejemplo para la extrusión de películas; se produce el polietileno de la invención en un solo reactor, por ejemplo de fase gaseosa.

Impact resistant lldpe composition and films made thereof

Impact resistant lldpe composition and films made thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

Impact resistant lldpe composition and films made thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

Process for the preparation of ethylene copolymers in the presence of free-radical polymerization initiator by copolymerizing ethylene, a bi- or multifunctional comonomer and optionally further comonomers

Polyethylene for rotomoulding

Polyethylene composition having high stress cracking resistance.

Un polietileno de baja densidad particularmente adecuado para el recubrimiento por extrusión que tiene las siguientes características: 1) densidad de 0,930 a 0,945 g/cm3, determinada de conformidad con ISO 1183 a 23°C; 2) relación de MIF/MIP de 10 a menos de 30; 3) MIF de3 a 25 g/10 min.; 4) Mz mayor o igual a 1.500.000 g/mol; 5) índice de ramificación de cadena larga, LCBI, menor o igual a 0,55; donde LCBI es la relación entre el radio de giro medio cuadrático medido Rg, medido mediante GPC-MALLS, y el radio de giro medio cuadrático para un polímero lineal que tiene el mismo peso molecular.

Polyethylene composition having high stress cracking resistance.

Un polietileno de baja densidad particularmente adecuado para el recubrimiento por extrusión que tiene las siguientes características: 1) densidad de 0,930 a 0,945 g/cm3, determinada de conformidad con lSO 1183 a 23°C; 2) relación de MIF/MIP de 30 a 55; 3) MIF de 3 a 25 g/10 min.; 4) Mz mayor o igual a 1.500.000 g/mol; 5) índice de ramificación de cadena larga, LCBI, menor o igual a 0,55; donde LCBI es la relación entre el radio de giro medio cuadrático medido Rg, medido mediante GPC-MALLS, y el radio de giro medio cuadrático para un polímero lineal que tiene el mismo peso molecular.

Impact resistant lldpe composition and films made thereof

Polyethylene of raised temperature resistance

Polyethylene composition of Raised Temperature Resistance, having the following features: 1) density from 0.935 to 0.945 g/cm 3 ; 2) melt flow index MIF from 10 to 18 g/10 min; 3) melt flow index MIP from 1 to 2.5 g/10 min; 4) ratio MIF/MIP from 5 to 10.

Polyethylene for injection moldings

Adhesive polymer composition

A novel adhesive composition suitable for composing multilayered coatings onto large, industrial equipement such as pipeline tubes is devised. The composition is a blend based on a polyethylene which determines the blend' s favorable properties, which polyethylene itself can be used further in coating cables and for producing mouldings, especially rotomoulded articles.

Adhesive polymer composition

A novel adhesive composition suitable for composing multilayered coatings onto large, industrial equipement such as pipeline tubes is devised. The composition is a blend based on a polyethylene which determines the blend' s favorable properties, which polyethylene itself can be used further in coating cables and for producing mouldings, especially rotomoulded articles.

adhesive polymer composition for film, film and coated steel pipe extrusion

composição polimérica adesiva. a presente invenção refere-se a uma nova composição adesiva adequada para composição e revestimentos com múltiplas camadas sobre um grande equipamento industrial, tal como uma tubulação, é projetada. acomposição é uma mistura baseada em um polietileno, a qual determina as propriedades favoráveis de mistura, polietileno o qual, em si, pode ser ainda usado no revestimento de cabos e para a produção de moldagens, especialmente artigos rotomoldados. adhesive polymer composition. The present invention relates to a novel adhesive composition suitable for multi-layer composition and coatings on large industrial equipment such as a pipe is designed. Combination is a polyethylene based blend which determines the favorable properties of the blend, polyethylene which itself can be further used in cable sheathing and for the production of moldings, especially rotomolded articles.

Adhesive polymer composition.

Se desarrolla una composición adhesiva novedosa adecuada para formar revestimientos de múltiples capas en equipo industrial grande tal como tubos de tubería; la composición es una mezcla basada en un polietileno el cual determina las propiedades favorables de la mezcla, el polietileno en sí se puede usar además para revestir cables y para producir piezas moldeadas, en especial artículos rotomoldeados.

Adhesive polymer composition

A NOVEL ADHESIVE COMPOSITION SUITABLE FOR COMPOSING MULTILAYERED COATINGS ONTO LARGE, INDUSTRIAL EQUIPMENT SUCH AS PIPELINE TUBES IS DEVISED. THE COMPOSITION IS A BLEND BASED ON A POLYETHYLENE WHICH DETERMINES THE BLEND'S FAVORABLE PROPERTIES, WHICH POLYETHYLENE ITSELF CAN BE USED FURTHER IN COATING CABLES AND FOR PRODUCING MOULDINGS, ESPECIALLY ROTOMOULDED ARTICLES.

Polyethylene article

New rotomouldings having superior FNCT are devised, based on the polyethylene suitably used. Further a novel subrange of polyethylene, suitable for such use and having optimum moulding behaviour, is devised.

Adhesive polymer composition

Adhesive polymer composition

A novel adhesive composition suitable for composing and multilayered coatings onto large, industrial equipement such as pipeline tubes is devised. The composition is a blend based on a polyethylene which determines the blend's favorable properties, which polyethylene itself can be used further in coating cables and for producing mouldings, especially rotomoulded articles.

Adhesive polymer composition

A novel adhesive composition suitable for composing multilayered coatings onto large, industrial equipement such as pipeline tubes is devised. The composition is a blend based on a polyethylene which determines the blend' s favorable properties, which polyethylene itself can be used further in coating cables and for producing mouldings, especially rotomoulded articles.

Polyethylene for rotomoulding

Polyethylene copolymers

Polyethylene copolymers

A multimodal ethylene copolymer having the following properties: i) density comprised in the range from 0.880 to 0.955 g/cm3; ii) total comonomer content ranging from 6% to 25% by weight; iii) content of 1-butene derived units ranging from 0 to 2% by weight; iv) Mw/Mn comprised from 4 to 20; v) intrinsic viscosity (decalin at 135°C as determined according to EN ISO 1628-312003) comprised between 1.0 and 4.0 dL/g; said multimodal ethylene copolymer comprises from 10% to 80% by weight of a first polyethylene component and being detected at the crystaf® apparatus at a temperature higher than 75°C and from 90% to 20% by weight of a second polyethylene component being a copolymer being detected at a crystaf® apparatus at a temperature lower than 75°C; wherein said multimodal ethylene copolymer being fractionated into 12 fractions by means of the Holtrup analysis, the fractions containing more than 2% by weight of the total amount of material meet the following relathionship: Cf/HDPE > -0.0075HDPE + 0.58; wherein Cf is the amount (%wt) of comonomer of formula CH 2 =CHT in the copolymer of the fraction and HDPE is the amount (%wt) of the homopolymer component present in the fraction.

Polyethylene Copolymers

A multimodal ethylene copolymer having the following properties: i) density comprised in the range from 0.880 to 0.955 g/cm3; ii) total comonomer content ranging from 6% to 25% by weight; iii) content of 1-butene derived units ranging from 0 to 2% by weight; iv) Mw/Mn comprised from 4 to 20; v) intrinsic viscosity (decalin at 135° C. as determined according to EN ISO 1628-312003) comprised between 1.0 and 4.0 dL/g; said multimodal ethylene copolymer comprises from 10% to 80% by weight of a first polyethylene component and being detected at the Crystaf® apparatus at a temperature higher than 75° C. and from 90% to 20% by weight of a second polyethylene component being a copolymer being detected at a Crystaf® apparatus at a temperature lower than 75° C.; wherein said multimodal ethylene copolymer being fractionated into 12 fractions by means of the Holtrup analysis, the fractions containing more than 2% by weight of the total amount of material meet the following relationship: Cf/HDPE >−0.0075 HDPE +0.58; wherein Cf is the amount (% wt) of comonomer of formula CH 2 ═CHT in the copolymer of the fraction and HDPE is the amount (% wt) of the homopolymer component present in the fraction.

Polymer composition

A polypropylene composition comprising: A) from 30% to 90% by weight of a propylene polymer composition comprising: a1) from 20% to 90% of a propylene homopolymer, or a copoloymer of propylene containing 3% or less of derived units of ethylene or C 4 -C 10 α-olefin(s) or of combinations thereof, said homopolymer or copolymer having a content of isotactic pentads (mmmm), measured by 13 C NMR on the fraction insoluble in xylene at 25 °C, higher than 96; a2) from 10% to 80%, of a copolymer of ethylene containing from 40% to 70% of derived units of propylene or C 4 -C 10 α-olefin(s) or of combinations thereof; B) from 10% to 70% by weight of a multimodal ethylene copolymer wherein the comonomer is selected from the derived units of alpha olefins of formula CH 2 =CHT wherein T is a C 3 -C 10 alkyl group; having the following properties: i) density (with ISO 1183) comprised in the range from 0.850 to 0.935 g/cm 3 ; ii) total comonomer content ranging from 6% to 30% by weight; iii) content of 1-butene derived units ranging from 0 to 2% by weight; iv) Mw/Mn comprised from 4 to 20; v) intrinsic viscosity (decalin at 135°C as determined according to EN IS0 1628-312003) comprised between 1.0 and 4.0 dL/g, and C) from 0 to 50 % by weight; preferably from 0 to 20% of a filler.

polymer composition

Polymer composition

Polymer Composition

A polypropylene composition comprising: A) from 30% to 90% by weight of a propylene polymer composition comprising: a1) from 20% to 90% of a propylene homopolymer, or a copolymer of propylene containing 3% or less of derived units of ethylene or C 4 -C 10 α-olefin(s) or of combinations thereof, said homopolymer or copolymer having a content of isotactic pentads (mmmm), measured by 13 C NMR on the fraction insoluble in xylene at 25° C., higher than 96; a2) from 10% to 80%, of a copolymer of ethylene containing from 40% to 70% of derived units of propylene or C 4 -C 10 α-olefin(s) or of combinations thereof; B) from 10% to 70% by weight of a multimodal ethylene copolymer wherein the comonomer is selected from the derived units of alpha olefins of formula CH 2 ═CHT wherein T is a C 3 -C 10 alkyl group; having the following properties: i) density (with ISO 1183) comprised in the range from 0.850 to 0.935 g/cm 3 ; ii) total comonomer content ranging from 6% to 30% by weight; iii) content of 1-butene derived units ranging from 0 to 2% by weight; iv) Mw/Mn comprised from 4 to 20; v) intrinsic viscosity (decalin at 135° C. as determined according to EN IS0 1628-312003) comprised between 1.0 and 4.0 dL/g, and C) from 0 to 50% by weight; preferably from 0 to 20% of a filler.

Polyethylene composition having high stress cracking resistance

A low density polyethylene particularly suited for extrusion coating, having the following features: 1) density from 0.930 to 0.945 g/cm 3 , determined according to ISO 1183 at 23°C; 2) ratio MIF/MIP from 30 to 55; 3) MIF from 3 to 25 g/10 ming/10 min.; 4) Mz equal to or greater than 1,500,000 g/mol; 5) long-chain branching index, LCBI, equal to or lower than 0.55; wherein LCBI is the ratio of the measured mean-square radius of gyration R g , measured by GPC-MALLS, to the mean-square radius of gyration for a linear PE having the same molecular weight.

Polyethylene composition having high stress cracking resistance

A low density polyethylene particularly suited for extrusion coating, having the following features: 1) density from 0.930 to 0.945 g/cm 3 , determined according to ISO 1183 at 23°C; 2) ratio MIF/MIP from 10 to less than 30; 3) MIF from 3 to 25 g/10 min.; 4) Mz equal to or greater than 1,500,000 g/mol; 5) long-chain branching index, LCBI, equal to or lower than 0.55; wherein LCBI is the ratio of the measured mean-square radius of gyration R g , measured by GPC-MALLS, to the mean-square radius of gyration for a linear PE having the same molecular weight.

Impact resistant lldpe composition and films made thereof

A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor.

Polymerization process in the presence of antistatic agent

PROCESSO DE POLIMERIZAÇÃO NA PRESENÇA DE AGENTE ANTIESTÁTICO. Trata-se de um processo para a preparação de poliolefinas, em que a polimerização é executada na presença de um agente antiestático que compreende um polímero derivado de óxido de alquileno que compreende em média de 10 a 200 unidades de repetição (CH2- CHR-O) com R como hidrogênio ou um grupo alquila que tem de 1 a 6 átomos de carbono, em que o polímero derivado de óxido de alquileno é um copolímero aleatório de óxido de etileno e outros óxidos de alquileno e uma razão n:m de unidades de repetição (CH2-CH2- O) derivadas de óxido de etileno e unidades de repetição (CH2-CHR'- O) derivadas dos outros óxidos de alquileno, em que R é um grupo alquila que tem de 1 a 6 átomos de carbono que está na faixa de 6 : 1 a 1: 1, e todos os grupos terminais do polímero derivado de óxido de alquileno são grupos OH. POLYMERIZATION PROCESS IN THE PRESENCE OF ANTI-STATIC AGENT. It is a process for the preparation of polyolefins, in which the polymerization is carried out in the presence of an antistatic agent that comprises a polymer derived from alkylene oxide that comprises on average from 10 to 200 repeating units (CH2-CHR-O ) with R as hydrogen or an alkyl group having from 1 to 6 carbon atoms, wherein the polymer derived from alkylene oxide is a random copolymer of ethylene oxide and other alkylene oxides and an n:m ratio of units of repeating units (CH2-CH2-O) derived from ethylene oxide and repeating units (CH2-CHR'-O) derived from the other alkylene oxides, where R is an alkyl group having from 1 to 6 carbon atoms that are in the range of 6:1 to 1:1, and all end groups of the alkylene oxide-derived polymer are OH groups.

polymerization process in the presence of antistatic agent

trata-se de um processo para a preparação de poliolefinas, em que a polimerização é executada na presença de um agente anti-estático que compreende um polímero derivado de óxido de alquileno que compreende em média de 10 a 200 unidades de repetição ?(ch2-chr-o)? com r como hidrogênio ou um grupo alquila que tem de 1 a 6 átomos de carbono, em que o polímero derivado de óxido de alquileno é um copolímero aleatório de óxido de etileno e outros óxidos de alquileno e uma razão n:m de unidades de repetição ?(ch2-ch2-o)? derivadas de óxido de etileno e unidades de repetição ?(ch2-chr'-o)? derivadas dos outros óxidos de alquileno, em que r? é um grupo alquila que tem de 1 a 6 átomos de carbono que está na faixa de 6 : 1 a 1: 1, e todos os grupos terminais do polímero derivado de óxido de alquileno são grupos ?oh. It is a process for the preparation of polyolefins, wherein the polymerization is carried out in the presence of an antistatic agent comprising an alkylene oxide derivative polymer comprising on average 10 to 200 repeating units? chr it)? with r as hydrogen or an alkyl group having from 1 to 6 carbon atoms, wherein the alkylene oxide derived polymer is a random copolymer of ethylene oxide and other alkylene oxides and an n: m ratio of repeating units ? (ch2-ch2-o)? ethylene oxide derivatives and repeating units? (ch2-chr'-o)? derived from other alkylene oxides, where r? is an alkyl group having from 1 to 6 carbon atoms that is in the range of 6: 1 to 1: 1, and all alkylene oxide derived polymer end groups are ω oh groups.

Polymerization process in the presence of antistatic agent

A process for the preparation of polyolefins, wherein the polymerization is carried out in the presence of an antistatic agent comprising an alkylene oxide derived polymer comprising in average from 10 to 200 repeating units -(CH 2 -CHR-O)- with R being hydrogen or an alkyl group having from 1 to 6 carbon atoms, wherein the alkylene oxide derived polymer is a random copolymer of ethylene oxide and other alkylene oxides and a ratio n : m of repeating units -(CH 2 -CH 2 -O)- derived from ethylene oxide to repeating units -(CH 2 -CHR'-O)- derived from the other alkylene oxides with R' being an alkyl group having from 1 to 6 carbon atoms is in the range of from 6 : 1 to 1 : 1, and all end groups of the alkylene oxide derived polymer are -OH groups.