Multilayer polyvinylidene films structures

The invention relates to a multi-layer weatherable film structure having an outer layer of a highly weatherable film, a layer having a high thermal deformation temperature, an optional tie layer, and a thin layer of polyolefin or polyamide. The highly weatherable film layer preferably is polyvinylidene fluoride. The polyolefin or polyamide layer is less than 500 microns in thickness, and preferably the whole film structure is less than 750 microns thick. The polyolefinjpolyamide side of the film structure can easily be adhered to many different substances—especially polyolefins and polyamides. This film can be used to provide a highly weatherable protective layer a substrate. One useful application for the film is in a photovoltaic module to protect the back side of the module from weathering and abrasion. The multi-layer film structure can be adhered to a typical polyolefin-based encapsulant layer and used as a backsheet encapsulant in a photovoltaic module.

Flexible film based on fluorinated polymer

The invention concerns a flexible film based on fluorinated polymer, and specifically refers to application of a PVDF film and/or a multilayer structure including PET or PEN sheet on a photovoltaic module, wherein the multilayer structure includes PVDF-based film F1 affixed to a PET or PEN sheet; or a PVDF-based film F1 bonded to a PET or PEN sheet which is itself affixed to a PVDF-based film F2.

THERMOPLASTIC FLUORINATED POLYMER COMPOSITION FOR OFF-SHORE PIPES

The invention relates to a composition comprising: 1. A composition comprising:from 60 to 80% by weight of a polyvinylidene fluoride;from 10 to 30% by weight of a copolymer of vinylidene fluoride and of at lease one comonomer;a plasticizer present in the composition in a proportion by weight of 1 to 5%; andfrom 3 to 20% by weight of fibers.2. The composition as claimed in claim 1 , in which the plasticizer is chosen from dibutyl sebacate claim 1 , dioctyl phthalate claim 1 , N-(n-butyl)-sulfonamide claim 1 , polymeric polyesters and the combinations of these.3. The composition as claimed in claim 1 , in which the plasticizer is present in a proportion by weight of 1 claim 1 ,5 to 3.5%.4. The composition as claimed in claim 1 , in which the fibers are chosen from carbon fibers claim 1 , glass fibers claim 1 , carbon nanotubes claim 1 , carbon nanofibers claim 1 , synthetic fibers and the combinations of these.5. The composition as claimed in claim 1 , in which the fibers are crosslinked polyvinylidene fluoride fibers.6. The composition as claimed in claim 1 , in which the copolymer is present in a proportion by weight of 15 to 25%.7. The composition as claimed in claim 1 , in which the proportion by weight of (co)monomer(s) other than vinylidene fluoride in the copolymer is within the range from 15 to 24%.8. The composition as claimed in claim 1 , in which the fluorinated comonomer(s) are chosen from the group it fluoromonomers consisting of vinyl fluoride claim 1 , trifluoroethylene claim 1 , chlorotrifluoroethylene (CITE) claim 1 , 1 claim 1 ,2-difluoroethylene claim 1 , tetraftuoroethylene (TEE) claim 1 , hexafluoropropylene (HFP) claim 1 , perfluoro(alkyl vinyl) ethers claim 1 , perfluoro(methyl vinyl) ether (PMVE) claim 1 , perfluoro(ethyl vinyl) ether (PINE) perfluoropropyl vinyl ether (PPVE) claim 1 , perfluoro(1 claim 1 ,3-dioxole) claim 1 , perfluoro(2 claim 1 ,2-dimethyl-1 claim 1 ,3-dioxole) (PDD) claim 1 , the product of formula CF═CFOCFCF(CF)OCFCFX in ...

Multilayer pipe for transporting water or gas

The invention relates to a multilayer pipe which comprises (in the following order, from the inside of the pipe outwards): optionally, a layer C1of a fluoropolymer; a layer C2of a fluoropolymer onto which at least one unsaturated monomer has been radiation-grafted, optionally blended with a fluoropolymer; optionally, an adhesion tie layer C3, this layer C3being directly attached to the layer C2containing the radiation-grafted fluoropolymer; a layer C4of a polyolefin optionally blended with a functionalized polyolefin, directly attached to the optional layer C3or else to the layer C2; optionally, a barrier layer C5; and optionally, a layer C6of a polyolefin.

Fluorinated polymer and zinc oxide film free of any acrylic odor for photovoltaic use

The present invention relates to a nanoscale polymer composition consisting of a fluorinated polymer and zinc oxide (ZnO) for manufacturing films that are transparent in the visible range and opaque to UV rays. Specifically, in the composition according to the invention: said filler is present in a weight proportion of 0.1 to 10%, preferably 0.5 to 6%; the ZnO particles are between 25 to 40 nm in size, preferably 30 to 35 nm; said particles have a surface treatment; and said composition is free of acrylic polymers.

Fluoropolymer-based film for photovoltaic application

The present invention relates to a composition comprising a fluoropolymer and two white inorganic fillers, said composition being intended for the manufacture of thin monolayer films which are opaque to visible light and to UV rays and which can be used in particular in the field of photovoltaic cells. This composition consists of at least one fluoropolymer and of two white inorganic fillers, which are zinc oxide and titanium oxide; they are present in a proportion by weight ranging from 5 to 30% and from 3 to 7.5% respectively. Said composition additionally comprises less than 5% by weight of acrylic polymer, with respect to the total weight of the composition.

Film containing an odourless fluorinated acrylic polymer for photovoltaic use

The present invention relates to a composition made of a fluorinated polymer and a white inorganic filler, said composition being intended for the production of single-layer films that are opaque to visible light and to UV rays, which can be used in particular in the field of photovoltaic cells. The polymer composition is made of a fluorinated polymer and zinc oxide (ZnO), said filler being in said composition in a proportion of 20 wt% to 40 wt%, preferably 20 wt% to 35 wt%. By using said filler it is possible to avoid adding acrylic polymers to the fluorinated polymer as well as to use implementation temperatures that are compatible with production by extrusion-blowing of a single-layer film, namely a temperature of the order of 220 DEG C to 260 DEG C, thus preventing the breakdown of the fluorinated polymer.

FLUORINATED POLYMER AND ZINC OXIDE FILM FREE OF ANY ACRYLIC ODOR FOR PHOTOVOLTAIC USE

The present invention relates to a polymeric composition composed of a fluoropolymer and of zinc oxide (ZnO) of nanometric size which is intended for the manufacture of films transparent in the visible region and opaque to UV radiation. More particularly, in the composition according to the invention, the said filler is present in a proportion by weight of 0.1 to 10%, preferably of 0.5 to 6%, the ZnO particles have a size ranging from 25 to 40 nm, preferably from 30 to 35 nm, these particles have a surface treatment and the said composition is devoid of acrylic polymers. 1. Polymeric composition comprising a fluoropolymer and zinc oxide (ZnO) particles , said ZnO being present in said composition in a by weight of 0.1 to 10% , characterized in that the fluoropolymer is a vinylidene difluoride homopolymer or a copolymer of vinylidene difluoride (VDF) and at least one other fluoromonomer , the ZnO particles have a size ranging from 25 to 40 nm , and having a surface treatment , said composition is devoid of acrylic polymers.2. Composition according to claim 1 , in which the ZnO particles are coated with silicon-based compounds.3. Composition according to claim 1 , in which the fluoropolymer is a polyvinylidene fluoride (PVDF) homopolymer.4. Composition according to claim 1 , in which the fluorocopolymer is a copolymer of VDF and at least one other fluoromonomer comprising at least 50% by weight of VDF.5. Composition according to claim 4 , in which the other fluoromonomer is hexafluoropropylene (HFP).6. Composition according to comprising PVDF and ZnO particles claim 1 , the ZnO particles having a size ranging from 30 to 35 nm and the content by weight of the ZnO being from 0.5 to 6%.7. Monolayer film which is opaque to UV radiation and transparent in the visible region and which exhibits a long term stability claim 1 , composed of the composition according to .8. Film according to claim 7 , wherein said film has a thickness of between 10 and 100 μm.9. Photovoltaic ...

MULTILAYER FLUORINATED FILMS

The present invention relates to multilayer films made of fluoro polymers, which have properties that make them suitable for use in the agricultural field, especially as greenhouse covering films. According to a first aspect, the invention relates to multilayer fluorinated films comprising at least three layers, including a layer A made of a first vinylidene fluoride copolymer with a crystallization temperature TcA, and a layer B made of a second vinylidene fluoride copolymer with a crystallization temperature TcB, TcA being greater than TcB, layers A and B being alternating, layer A being placed to the exterior and layer B between two layers A. Another subject of the invention relates to the use of the film according to the invention as an agricultural covering material, especially as a greenhouse covering. 1. Multilayer fluorinated film comprising at least three layers , comprising a layer A made of a first vinylidene fluoride copolymer with a crystallization temperature TcA , and a layer B made of a second vinylidene fluoride copolymer with a crystallization temperature TcB , wherein TcA is greater than TcB , layers A and B are alternating , layer A being placed to the exterior and layer B between two layers A.2. Multilayer film according to claim 1 , in which layer A has an elastic modulus Eand layer B has an elastic modulus E claim 1 , wherein Eis greater than E.3. Multilayer film according to claim 1 , having the structure A-B-A or A-B-A-B-A or A-B-A-B-A-B-A.4. Multilayer film according to claim 1 , in which at least one of said vinylidene fluoride copolymers are copolymers of VDF and HFP.5. Multilayer film according to claim 1 , wherein said film is free of acrylate and of olefin polymers.6. Multilayer film according to claim 1 , having a thickness of from 5 to 1000 μm claim 1 , in which layer A has a thickness of from 5 to 250 μm and layer B has a thickness of from 1 to 50 μm.7. Multilayer film according to claim 6 , having a thickness of from 50 to 200 μm ...

FLUORINATED POLYMER AND ZINC OXIDE FILM FREE OF ANY ACRYLIC ODOR FOR PHOTOVOLTAIC USE

The present invention relates to a process for forming a polymeric composition composed of a fluoropolymer and of zinc oxide (ZnO) of nanometric size from an acrylic masterbatch. The polymeric composition is intended for the manufacture of films transparent in the visible region and opaque to UV radiation. More particularly, in the composition according to the invention, the filler is present in a proportion by weight of 0.1 to 10%, preferably of 0.5 to 6%, the ZnO particles have a size ranging from 25 to 40 nm, preferably from 30 to 35 nm, these particles have a surface treatment and the said composition is devoid of acrylic polymers. 1. A process for the preparation of a composition comprising a vinylidene fluoride homopolymer or copolymer (PVDF) and one or more inorganic filler(s) , comprising the steps of:a) preparing an acrylic masterbatch by dispersing said inorganic filler into a methyl methacrylate polymer or copolymer (PMMA), andb) blending said acrylic masterbatch with the PVDF in the molten state.2. The process according to wherein said inorganic filler is selected from the group consisting of TiO claim 1 , SiO claim 1 , CaO claim 1 , MgO claim 1 , CaCOand AlO.3. The process according to wherein said PVDF is the vinylidene difluoride (VDF) homopolymer.4. The process according to wherein the PVDF is a copolymer of vinylidene difluoride and at least one other fluoromonomer claim 1 , said copolymer comprising at least 50% by weight of VDF.5. The process according to wherein the other fluoromonomer comprises hexafluoropropene (HFP).6. A monolayer film which is opaque to UV radiation and transparent in the visible region composed of the composition according to .7. A photovoltaic panel claim 6 , wherein the frontsheet and/or the backsheet comprises the film according to . This application is a continuation of copending U.S. patent application Ser. No. 13/388,845, filed Apr. 10, 2012. Priority is claimed to U.S. Ser. No. 13/388,845, as well as PCT application ...

Film containing an odourless fluorinated acrylic polymer for photovoltaic use

The present invention relates to a composition consisting of a fluoropolymer and a white inorganic filler, said composition being intended for the manufacture of monolayer films opaque to visible tight and to UV radiation, useable in particular in the field of photovoltaic cells. The polymeric composition consists of a fluoropolymer and zinc oxide (ZnO), said filler being present in said composition in a weight proportion of 20 to 40%, preferably 20 to 35%. The use of this filler serves on the one hand to avoid the addition of acrylic polymers to the fluoropolymer, and on the other hand, to use processing temperatures that are compatible with the manufacture of a monolayer film by extrusion blow moulding, that is, a temperature of about 220 to 260° C., thereby serving to prevent the degradation of the fluoropolymer.

FLUOROPOLYMER-BASED FILM FOR PHOTOVOLTAIC APPLICATION

The present invention relates to a composition comprising a fluoropolymer and two white inorganic fillers, the said composition being intended for the manufacture of thin monolayer films which are opaque to visible light and to UV rays and which can be used in particular in the field of photovoltaic cells. This composition consists of at least one fluoropolymer and of two white inorganic fillers, which are zinc oxide and titanium oxide; they are present in a proportion by weight ranging from 5 to 30% and from 3 to 7.5% respectively, The said composition additionally comprises less than 5% by weight of acrylic polymer, with respect to the total weight of the composition. 1. A composition comprising at least one fluoropolymer and of two white inorganic fillers , wherein said fillers are zinc oxide and titanium oxide , in that they are present in a proportion by weight ranging from 5 to 30% and from 3 to 7.5% respectively , and wherein said composition additionally comprises at least one acrylic polymer at up to 5% by weight , with respect to the total weight of the composition.2. The composition according to claim 1 , wherein said at least one fluoropolymer is selected from the group consisting of vinylidene fluoride homopolymers and copolymers of vinylidene fluoride with at least one other fluoromonomer.3. The composition according to claim 1 , wherein there are two distinct fluoropolymers claim 1 , at least one of which is a vinylidene fluoride homopolymer.4. The composition according to claim 1 , wherein the content by weight of zinc oxide ranges from 10 to 20% by weight.5. The composition according to claim 1 , wherein the content by weight of titanium oxide ranges from 3 to 6% by weight.6. The composition according to claim 1 , wherein the said acrylic polymer is a methyl methacrylate homopolymer or a copolymer comprising at least 50% by weight of methyl methacrylate with least one other monomer which can copolymerize with methyl methacrylate selected from the ...

USE OF A MULTILAYER PVC/FLUORINATED POLYMER STRUCTURE FOR PROTECTING THE REAR OF SOLAR PANELS

The invention relates to a novel use of a multilayer structure, combining fluorinated polymers and PVC, as protection for use at the rear of a photovoltaic solar panel, said structure having improved durability in outdoor environments, while retaining the other properties associated with a back-sheet, namely good electric insulation, thermal stability in terms of volume and dimensions and good adhesion to the encapsulating material. The invention relates to the use of a multilayer structure as protection at the rear of a solar panel, said structure comprising at least one layer of fluorinated polymer and one layer of PVC. 1. A solar panel backsheet , having a multilayer structure comprising at least one layer of fluorinated polymer and one layer of polyvinylidene chloride (PVC) , in which said fluorinated polymer is a homopolymer of vinylidene chloride (VDF) or a copolymer of VDF and of a fluorinated comonomer which can copolymerize with VDF.2. The solar panel backsheet as claimed in claim 1 , in which the fluorinated comonomer which can copolymerize with VDF is selected from the group consisting of vinyl fluoride claim 1 , trifluoroethylene claim 1 , chlorotrifluoroethylene claim 1 , 1 claim 1 ,2-difluoroethylene claim 1 , tetrafluoroethylene claim 1 , hexafluoropropylene (HFP) claim 1 , perfluoro(alkyl vinyl) ethers claim 1 , perfluoro(methyl vinyl) ether claim 1 , perfluoro(ethyl vinyl) ether claim 1 , perfluoro(propyl vinyl) ether claim 1 , perfluoro(1 claim 1 ,3-dioxole) claim 1 , perfluoro(2 claim 1 ,2-dimethyl-1 claim 1 ,3-dioxole claim 1 , and mixtures thereof.3. The solar panel backsheet as claimed in claim 1 , in which said copolymer is a VDF-HFP copolymer comprising at least 50% by weight of VDF.4. The solar panel backsheet as claimed in claim 1 , in which the fluorinated polymer additionally comprises at least one homopolymer or copolymer of methyl methacrylate.5. The solar panel backsheet as claimed in claim 4 , in which said fluorinated polymer ...

Use of a multilayer structure based on a halogenated polymer as a protective sheet of a photovoltaic module

The present invention relates to the use of a specific multilayer structure in the front and/or rear protective sheet of a photovoltaic module comprising photovoltaic cells covered with an encapsulant. This multilayer structure comprises a substrate enclosing at least one halogenated polymer and at least one stack of one layer (A) of SiO2 and one layer (B) of an SiOxNyHz material disposed between the substrate and the layer (A), said layers having given thicknesses. This stack is disposed on the face of the substrate turned towards the encapsulant and optionally on the opposing face of the substrate. It also relates to a photovoltaic module comprising the abovementioned multilayer structure in the front and/or rear protective sheet thereof.

PROCESS FOR MAKING A FLUOROPOLYMER DISPERSION

The invention relates to a process to produce a stable fluoropolymer latex using non-fluorinated surfactant with greater thermal stability. The polymerization is run at pressures greater than typically used. The resulting polymer exhibit improved melt color stability as compared to those produced under similar conditions at lower pressures. 1. A process for forming a stable fluoropolymer emulsion , comprising polymerizing in a reactor , one or more fluoromonomers in an aqueous medium comprising initiator , optionally fluorine-free surfactant , and running the polymerization at a pressure of greater than 800 psi; and wherein the surfactant comprises a non-fluorinated non-ionic emulsifiers containing segments of at least one of polyethylene glycol (PEG) , polypropylene glycol (PPG) , polytetramethylene glycol (PTMG) or a combination thereof , with repeating units between 2 to 200 , preferably between 3 to 100 , and more preferably 5 to 50.2. The process of claim 1 , wherein the pressure during polymerization is greater than 1000 psi.3. The process of any one of or claim 1 , wherein the pressure during polymerization is at least 1100 psi claim 1 , preferably at least 1150 psi claim 1 , more preferably at least 1200 psi.4. The process of claim 1 , wherein the pressure during polymerization is from greater than 1000 psi to 2500 psi.5. The process of claim 4 , wherein the pressure during polymerization is from at least 1100 psi to 2000 psi.6. The process of any one of to claim 4 , wherein the surfactant comprises at least one surfactant selected from the group consisting of polyethylene glycol acrylate (PEGA) claim 4 , polyethylene glycol methacrylate (PEG-MA) claim 4 , dimethyl polyethylene glycol (DMPEG) claim 4 , polyethylene glycol butyl ether (PEGBE) claim 4 , polyethylene glycol (PEG) claim 4 , polyethylene glycol phenol oxide (Triton X-100) claim 4 , polypropylene glycol acrylate (PPGA) claim 4 , polypropylene glycol (PPG) polypropylene glycol acrylate (PPGA) claim ...

MULTILAYER POLYVINYLIDENE FILMS STRUCTURES

The invention relates to a multi-layer weatherable film structure having an outer layer of a highly weatherable film, a layer having a high thermal deformation temperature, an optional tie layer, and a thin layer of polyolefin or polyamide. The highly weatherable film layer preferably is polyvinylidene fluoride. The polyolefin or polyamide layer is less than 500 microns in thickness, and preferably the whole film structure is less than 750 microns thick. The polyolefinjpolyamide side of the film structure can easily be adhered to many different substances—especially polyolefins and polyamides. This film can be used to provide a highly weatherable protective layer a substrate. One useful application for the film is in a photovoltaic module to protect the back side of the module from weathering and abrasion. The multi-layer film structure can be adhered to a typical polyolefin-based encapsulant layer and used as a backsheet encapsulant in a photovoltaic module. 1. A multilayer film structure comprising , in order:a) a highly weatherable layer;b) a high deformation temperature layer;e) an optional tie layer; andd) a polyolefin or polyamide layer;wherein a single polyamide layer could function as both the high thermal deformation temperature layer b), and also the polyamide layer d) without any tie layer c); wherein each layer is adhered to one another in their respective contact regions;wherein the total film thickness is greater than 12 microns and less than 750 microns, and wherein each layer is thermoplastic.2. The multi-layer film structure of claim 1 , wherein said highly weatherable layer comprises one or more polyvinylidene fluoride sublayers claim 1 , wherein said high deformation layer comprises one or more sublayers claim 1 , wherein said optional tie layer comprises one or more tie sublayers claim 1 , and wherein said polyamide or polyolefin layer comprises one or more polyolefin or polyamide sublayers.3. The multi-layer film structure of claim 1 , wherein ...

FLUORINATED FILM

The present invention relates to a fluorinated composition and a fluorinated film having properties that make it suitable for use outside, especially in the agricultural sector. The film according to the invention is a single-layer polymer film comprising a polyvinylidene fluoride (PVDF) matrix and at least one impact modifier having a polyorganosiloxane core and at least one thermoplastic shell, in which the weight content of impact modifier varies between 2.5% and less than 40%. According to one embodiment variant, the invention relates to multilayer films comprising at least one layer of said fluorinated film and at least one layer of unmodified PVDF. 1. A composition comprising a polyvinylidene fluoride (PVDF) matrix and at least one core-shell impact modifier having a poly(organosiloxane) core and at least one thermoplastic shell , in which the content by weight of impact modifier varies between 2.5% and less than 40%.2. The composition as claimed in claim 1 , in which the content by weight of impact modifier is greater than 5% and less than or equal to 30%.3. The composition as claimed in claim 1 , in which the PVDF matrix is composed of a PVDF homopolymer or of a copolymer prepared by copolymerization of vinylidene fluoride with a fluorinated comonomer selected from the group consisting of: vinyl fluoride; trifluoroethylene; chlorotrifluoroethylene; 1 claim 1 ,2-difluoroethylene; tetrafluoroethylene; hexafluoropropylene; perfluoro(alkyl vinyl) ethers; perfluoro(methyl vinyl) ether claim 1 , perfluoro(ethyl vinyl) ether (PEVE) claim 1 , perfluoro(propyl vinyl) ether; perfluoro(1 claim 1 ,3-dioxole); and perfluoro(2 claim 1 ,2-dimethyl-1 claim 1 ,3-dioxole).4. The composition as claimed in claim 1 , in which said poly(organosiloxane) core comprises one or more groups chosen from alkyl or vinyl radicals comprising between 1 and 18 carbons claim 1 , aryl radicals and hydrocarbons which are substituted.5. The composition as claimed in claim 1 , in which said core ...

FUNCTIONAL FLUOROPOLYMERS

The invention relates to novel linear, semi-crystalline, functional fluoropolymers that have been obtained by copolymerizing a fluorinated vinylic monomer and a hydrophilic monomer chosen from vinyl alkyl acids, vinyl phosphonates, functional acrylamides, carbonates, vinyl ethers, alkoxy compounds, and double hydrophilic group monomers. 1. A fluorinated copolymer comprising a fluorinated vinylic monomer and one or more hydrophilic monomers selected from the group consisting of vinyl alkyl acids , vinyl phosphonates , functional acrylamides , carbonates , vinyl ethers , alkoxy compounds , and double hydrophilic group monomers.2. The copolymer of comprising up to 10.0 wt % of said hydrophilic monomers.3. The copolymer of claim 1 , wherein said fluorinated vinylic monomer comprises vinylidene fluoride.4. The copolymer of claim 1 , wherein at least one of said hydrophilic monomers comprise at least one halogen on the vinylic carbon.5. The copolymer of claim 4 , wherein said at least one halogen comprises fluorine.12. The copolymer of claim 1 , wherein said multi hydrophilic functional comonomer claim 1 , are selected from the group consisting of itaconic acid claim 1 , maleic acid claim 1 , glutaconic acid claim 1 , fumaric acid claim 1 , and the anhydrides claim 1 , alkali metal salts claim 1 , ammonium claim 1 , and mono- claim 1 , di- claim 1 , tri- claim 1 , and tetraalkylammonium salts thereof.13. A formulation comprising the fluorinated copolymer of claim 1 , in a solvent.14. The formulation of claim 13 , wherein said solvent is selected from the group consisting of n-methylpyrrolidone (NMP) claim 13 , dimethylsulfoxide (DMSO) claim 13 , N claim 13 ,N-dimethylformamide (DMF) claim 13 , triethylphosphite (TEP) claim 13 , acetone claim 13 , tetrahydrofuran claim 13 , methyl ethylketone (MEK) claim 13 , methyl isobutyl ketone (MiBK) claim 13 , ethyl acetate (EA) claim 13 , butyl acetate (BA) claim 13 , dimethyl carbonate (DMC) claim 13 , diethyl carbonate (DEC) and ...

Fluorinated polymer composition

The present invention concerns a fluorinated polymer composition, methods for producing same, and products that can be produced from said composition. More particularly, the invention concerns a thermoplastic polymer composition comprising the following components A, B and C: A- a polyvinylidene fluoride (PVDF) homopolymer comprising a fraction of ultra high molecular weight chains (UHMCF); B- a vinylidene fluoride (VDF) elastomeric copolymer and at least one other fluorinated comonomer copolymerisable with VDF, and C- a VDF homopolymer having a lower viscosity than component A.

Method for preparing a crosslinked fluorinated polymer composition

The invention relates to a method for producing composition, said method involving—mixing a polyvinylidene fluoride with a copolymer of vinylidene fluoride and a comonomer, and with a crosslinking agent; crosslinking the obtained mixture. The invention further relates to the composition obtained by said method as well as the use of the composition for producing various items, such as pipes.”

FLUORINATED COMPOSITION CONTAINING A UV ABSORBER AND USE OF SAME AS A TRANSPARENT PROTECTIVE LAYER

The present invention concerns compositions made from fluorinated polymers and the uses of same in order to produce transparent monolayer or multilayer films intended to protect various substrates. The polymer composition consists of at least one polymer made from vinylidene fluoride, at least one acrylic polymer and at least one UV absorber, the mass ratio of said fluorinated polymer being and %, the mass ratio of said UV absorber being from to % and the molecular weight of the latter is greater than g/mol. 1. A polymer composition comprising at least one polymer based on vinylidene fluoride , at least one acrylic polymer and at least one UV absorber , wherein the proportion by weight of said fluoropolymer varies from 60 to 90% , the proportion by weight of said UV absorber varies from 0.5 to 5% and whereto the UV absorber has a molecular weight greater than 500 g/mol.2. The composition as claimed in claim 1 , wherein said polymer based on vinylidene fluoride is chosen from vinylidene fluoride homopolymers claim 1 , and copolymers of vinylidene fluoride with least one other fluoromonomer.3. The composition as claimed in wherein said acrylic polymer is a methyl methacrylate homopolymer or a copolymer comprising at least 50% by weight of methyl methacrylate and at least one other monomer which can copolymerize with methyl methacrylate chosen from alkyl (meth)acrylates claim 1 , acrylonitrile claim 1 , butadiene claim 1 , styrene and isoprene.4. The composition as claimed in wherein the proportion by weight of the polymer based on vinylidene fluoride varies from 60 to 80%.5. The composition as claimed in wherein said UV absorber is the group consisting of from benzophenones claim 1 , benzotriazoles claim 1 , triazines claim 1 , cyanoacrylates and oxalanilides: 1 claim 1 ,3-bis[(2′-cyano-3′ claim 1 ,3′-diphenylacryloyl)oxy]-2 claim 1 ,2-bis{[(2′-cyano-3′ claim 1 ,3′-diphenylacryloyl)oxy]methyl}propane claim 1 , 2 claim 1 ,2′-methylenebis(6-(2H-benzotriazol-2-yl)-4-(1 ...

SYNTHESIS OF SURFACTANT-FREE POLY (VINYLIDENE FLUORIDE) LATEXES VIA RAFT EMULSION POLY-MERIZATION

The present invention relates to a process for producing a stable fluorinated latex by emulsion polymerization in the absence of fluorinated surfactant, stabilized by an amphiphilic block copolymer formed in situ. The invention also concerns the aqueous dispersion comprising the fluorinated polymer chains and the amphiphilic block copolymers, obtained by this process. 5. The process of claim 1 , wherein vinylidene fluoride polymer formed in step b includes both homopolymers of vinylidene fluoride and copolymers containing at least 50 mole percent of vinylidene fluoride copolymerized with at least one ethylenically unsaturated monomer selected from the group consisting of: tetrafluoroethylene claim 1 , trifluoroethylene claim 1 , chlorotrifluoroethylene claim 1 , hexafluoropropene claim 1 , vinylfluoride claim 1 , pentafluoropropene claim 1 , perfluoromethyl vinyl ether claim 1 , perfluoropropyl vinyl ether claim 1 , (meth)acrylic acid and (meth)acrylic esters such as alkyl(meth)acrylates claim 1 , vinyl esters such as vinyl acetate claim 1 , vinyl propionate claim 1 , vinyl butyrate claim 1 , vinyl benzoate claim 1 , maleic esters such as dimethyl maleate claim 1 , diethyl maleate claim 1 , di-n-propyl maleate claim 1 , diisopropyl maleate claim 1 , di-2-methoxyethyl maleate claim 1 , fumaric esters such as dimethyl fumarate claim 1 , diethyl fumarate claim 1 , di-n-propyl fumarate claim 1 , diisopropyl fumarate claim 1 , styrene claim 1 , vinyltoluene claim 1 , alpha-methylstyrene claim 1 , acrylonitrile claim 1 , anhydrides claim 1 , vinyl esters claim 1 , alpha-olefins claim 1 , substituted or unsubstituted mono and dialkyl esters of unsaturated dicarboxylic acids claim 1 , vinyl aromatics claim 1 , and cyclic monomers.6. The process of claim 1 , wherein said initiator is a persulfate salt claim 1 , selected from the group consisting of sodium persulfate claim 1 , potassium persulfate claim 1 , or ammonium persulfate claim 1 , the amount of persulfate salt added ...

FLUOROPOLYMER BASED POWDER COATING

The invention relates to fluorinated-acrylic thermoplastic compositions, to powder coatings made of such compositions, and to a process for preparing said powder coatings. 1. A composition consisting of:a. 50-95 weight % of one or more thermoplastic fluoropolymers, andb. 5-50 weight % of an acrylic polymer,{'sup': '−1', 'wherein the fluoropolymer has a melt viscosity of from 0.04 to below 1 kP measured at 100 secand 230° C. by using ASTM D3835.'}2. The composition of wherein at least one thermoplastic fluoropolymer is selected from the group consisting of: homopolymers of vinylidene fluoride (VDF); copolymers of vinylidene fluoride (VDF) containing at least 50% by weight of VDF claim 1 , wherein at least one comonomer of the VDF copolymer is selected from the group consisting of chlorotrifluoroethylene claim 1 , hexafluoropropylene claim 1 , trifluoroethylene and tetrafluoroethylene; homopolymers of trifluoroethylene; copolymers of trifluoroethylene; and copolymers comprising the residues of at least 2 of chlorotrifluoroethylene claim 1 , tetrafluoroethylene claim 1 , hexafluoropropylene claim 1 , ethylene units and optionally VDF and/or trifluoroethylene units.3. The composition of wherein the fluoropolymer is selected from the group consisting of polyvinylidene fluoride (PVDF) homopolymer or a copolymer of vinylidene fluoride with hexafluoropropylene or a copolymer of vinylidene fluoride with tetrafluoroethylene.4. The composition of wherein said acrylic polymer is a homopolymer of methylmethacrylate (MMA) or a copolymer of methylmethacrylate and at least one other monomer copolymerizable with MMA claim 1 , wherein the copolymer of methylmethacrylate (MMA) contains at least 50% MMA by weight.5. A powder coating composition comprising the composition of claim 1 , wherein said composition further comprises from 5 to 30% by weight of one or more pigments and optionally additives.6. The powder coating composition of wherein at least one pigment is selected from the ...

BINDER CONTAINING POLYVINYLIDENE FLUORIDE CAPABLE OF FIXING TO A METAL AND ASSOCIATED LITHIUM-ION BATTERY ELECTRODE

The present invention relates to a binder which can be used in a lithium-ion battery, comprising at least one polyvinylidene fluoride and at least one acrylic copolymer including monomers having functional groups which have an affinity for metals or are capable of fixing to the metals. According to the invention, in a characteristic manner, said polyvinylidene fluoride is such that a solution of N-methyl-2-pyrrolidone containing 5 wt % of said polyvinylidene fluoride has a viscosity, measured at 23° C. with an imposed shear rate of 30 rpm, of 125 mPa·s to 1500 mPa·s. 1. A binder for a lithium-ion battery and comprising at least one vinylidene fluoride polymer and at least one acrylic copolymer comprising monomers comprising functional groups exhibiting an affinity for metals or which are capable of becoming fixed to metals , wherein said acrylic copolymer is a copolymer of methyl methacrylate and methacrylic acid and in that said vinylidene fluoride polymer is such that a solution of N-methyl-2-pyrrolidone containing 5% by weight of said vinylidene fluoride polymer exhibits a viscosity , measured at 23° C. with a controlled shear rate of 30 revolutions/min , equal to or greater than 125 mPa·s , and less than 1500 mPa·s.2. The binder as claimed in claim 1 , wherein said vinylidene fluoride polymer is such that said viscosity of said solution of N-methyl-2-pyrrolidone containing 5% by weight of said vinylidene fluoride polymer is about 150 mPa·s or about 700 mPa·s.3. The binder as claimed in claim 1 , wherein said acrylic copolymer comprises monomers comprising at least one type of functional group chosen from the following groups: carboxyl claim 1 , carboxylic anhydride claim 1 , epoxy claim 1 , mercapto claim 1 , sulfide claim 1 , phenolic and ester.4. The binder as claimed in claim 1 , wherein said acrylic copolymer contains 10 mol % of monomers bearing functional groups exhibiting an affinity for metals or capable of becoming fixed to metals and in particular 10 ...

Combination of a thermoplastic elastomer and a fluoropolymer

The present invention relates to a combination of polymers comprising:at least one thermoplastic elastomer comprising at least 10% by mass of ester flexible blocks relative to the total mass of the thermoplastic elastomer, andat least one fluoropolymer comprising a vinylidene fluoride homopolymer or copolymer.

Structure comprising a modified fluoropolymer and electrode based on this structure

The present invention relates to a structure comprising, in succession: a metal layer L1, optionally a fluorinated primer L2, which is a blend comprising, by weight, 1 to 100% of at least one modified fluoropolymer per 0 to 99% of fluoropolymer, respectively, and a layer of a fluoropolymer L3; such that, if the primer layer L2 is absent, the fluoropolymer L3 is a blend comprising, by weight, 1 to 100% of at least one modified fluoropolymer per 0 to 99% of fluoropolymer, respectively; the said modified fluoropolymer being chosen from: fluoropolymers grafted with an unsaturated monomer, the grafting being carried out in the absence of oxygen by irradiation of the unsaturated monomer and of the fluoropolymer that are melt-blended beforehand, and fluoropolymers irradiated in the presence of oxygen (also referred to as oxidized fluoropolymers). The structure is useful as a positive electrode for a lithium-ion battery.

Method for making telechelic fluoride-based polymers

The invention relates to a method of polymerizing at least one fluorinated monomer comprising an ethylene bond, the method comprising putting in contact the at least one fluorinated monomer with a polymerization initiator and a chain transfer agent, the chain transfer agent being a polysulfide compound, preferably a disulfide compound. The invention also relates to a telechelic fluoride-based polymer obtained with said method.

Thermoforming multilayer film for protecting substrates, and objects obtained

A thermoforming multilayer film comprising successively: at least one layer chosen from layers A1 and A2, an optional layer B1, a layer B2, a layer B3, and an optional layer B4. A1 comprises a fluoropolymer A111 or a polymer A112 consisting essentially of alkyl(methyl)acrylate units or a blend of the two, layer A2 consists of ink, layer B1 comprises a fluoropolymer B111 or a polymer B112 consisting essentially of alkyl(meth)acrylate units or a blend of the two, layer B2 is based on a polyamide, layer B3 consists of polyolefin functionalized with unsaturated carboxylic anhydride and layer B4 comprises polyolefin. A process for producing the multilayer film comprising co-extrusion is described.

Thermoforming multilayer film for protecting substrates, and objects obtained

MULTILAYER TUBE BASED ON MODIFIED FLUORINATED POLYMER

Multilayer Tube for Transporting Water or Gas

The invention relates to a multilayer tube comprising (from the inside to the outside of the tube): an optional layer (C 1 ) consisting of at least one fluorinated polymer; a layer (C 2 ) consisting of at least one radiation-grafted fluorinated polymer which is optionally mixed with at least one fluorinated polymer; an optional layer (C 3 ) of adhesive binder; a layer (C 4 ) consisting of at least one polyolefin or a mixture of at least one polyolefin with at least one functionalised polyolefin; a barrier layer (C 5 ) consisting of a metal shield or comprising EVOH or a mixture based on EVOH, a PVDF or a PGA; and an optional layer (C 6 ) consisting of at least one polyolefin.

FLUORINATED POLYMERIC COMPOSITION

La présente invention concerne une composition polymérique fluorée, des procédés de fabrication de celle-ci, ainsi que des produits pouvant être fabriqués à partir de cette composition. Plus particulièrement, l'invention concerne une composition polymérique thermoplastique comprenant les composants A, B et C suivants: A - un homopolymère de polyfluorure de vinylidène (PVDF) comprenant une fraction de chaînes de très haute masse molaire (FCTHM), notamment une fraction de chaînes non transférées (FCNT) ; B - un copolymère élastomérique de fluorure de vinylidène (VDF) et d'au moins un autre comonomère fluoré copolymérisable avec le VDF, et C - un homopolymère du VDF de basse viscosité. The present invention relates to a fluorinated polymeric composition, methods of making the same, and products that can be made therefrom. More particularly, the invention relates to a thermoplastic polymeric composition comprising the following components A, B and C: A - a vinylidene polyfluoride homopolymer (PVDF) comprising a fraction of very high molecular weight chains (FCTHM), in particular a fraction of non-transferred channels (FCNT); B - an elastomeric copolymer of vinylidene fluoride (VDF) and at least one other fluorinated comonomer copolymerizable with VDF, and C - a homopolymer of VDF of low viscosity.

Composition coextrudable with PVDF and having no stress-whitening effect

The present invention relates to a composition coextrudable with PVDF and comprising: 30 to 50 parts of PVDF; 70 to 50 parts of a copolymer comprising, by weight, 90 to 50% of methyl methacrylate (MMA) per 10 to 50% of an alkyl (meth)acrylate respectively, the alkyl having from 2 to 24 carbon atoms; 1 to 4 parts of a UV absorber; the total making 100 parts. The invention also relates to coextruded films consisting of this composition as the adhesive layer and a PVDF-based layer of 50 to 100 parts of PVDF per 50 to 0 parts of PMMA respectively. These films possess mechanical properties sufficient to allow them to be used as a coating transparent to visible light but opaque to UV radiation.

Manufacturing fluorinated film useful for protecting back sheet of photovoltaic panel, comprises coextruding fluorinated film with layer of nonfluorinated polymer with mineral loads, and then delaminating layer of nonfluorinated polymer

La présente invention concerne un procédé de fabrication d'un film fluoré présentant un état de surface mat ainsi que l'utilisation d'une couche de polymère non fluoré comprenant des charges pour modifier l'état de surface d'un tel film fluoré. L'invention concerne également un panneau photovoltaïque comportant une face arrière fabriquée au moyen dudit film fluoré présentant un état de surface mat. Le procédé selon l'invention consiste à coextruder un film fluoré avec au moins une couche de polymère non fluoré contenant 1 à 50% en poids, de préférence 5 à 30% en poids de charges minérales, puis à délaminer cette couche de polymère non fluoré.

FILM BASED ON FLUORINATED POLYMER FOR PHOTOVOLTAIC APPLICATION

The present invention relates to a composition comprising a fluoropolymer and two white inorganic fillers, the said composition being intended for the manufacture of thin monolayer films which are opaque to visible light and to UV rays and which can be used in particular in the field of photovoltaic cells. This composition consists of at least one fluoropolymer and of two white inorganic fillers, which are zinc oxide and titanium oxide; they are present in a proportion by weight ranging from 5 to 30% and from 3 to 7.5% respectively, The said composition additionally comprises less than 5% by weight of acrylic polymer, with respect to the total weight of the composition.

Microcomposite power based on an electrical conductor and a fluoropolymer, and objects manufactured with this powder

The present invention relates to a microcomposite powder comprising particles from 1 um to 300 um of an electrically conductive product, which are coated with particles from 0.1 μm to 0.5 μm of a fluoropolymer. According to one advantageous form of the invention the microcomposite powder comprises a product (A) which is a polymer or an oligomer which can be dissolved with a solvent which is not a solvent for the fluoropolymer or for the electrically conductive product. The present invention also relates to objects consisting of this powder. These objects may be bipolar plates for fuel cells, or supercapacitor components.

Pvdf-based extrusion-aiding agent

The invention concerns a composition comprising: at least one fluorinated polymer (A), at least one interfacing agent (B), at least one stabilizer (C) of formula (I), wherein: Ar1 and Ar2 represent an aryl group. The composition is used as an agent for extruding a thermoplastic polyolefin or resin. The invention also concerns an extruding method consisting in: (i) contacting in solid phase a composition as defined in any one of Claims 1 to 13 with a thermoplastic polyolefin or a thermoplastic resin; (ii) then extruding the mixture obtained in (i) in the form of a film, a tube, a profiled section or a hollow body.

Fluorinated polymer and zinc oxide film free of any acrylic odor for photovoltaic use

La présente invention concerne une composition polymérique consistant en un polymère fluoré et de l'oxyde de zinc (ZnO) de taille nanométrique, destinée à la fabrication de films transparents dans le domaine visible et opaques aux rayonnements UV. Plus particulièrement, dans la composition selon l'invention : ladite charge est présente dans une proportion massique de 0,1 à 10%, de préférence de 0,5 à 6%; les particules de ZnO ont une taille allant de 25 à 40 nm, de préférence de 30 à 35 nm; ces particules possèdent un traitement de surface, et ladite composition est exempte de polymères acryliques.

FLUORINATED POLYMERIC COMPOSITION

La présente invention concerne une composition polymérique fluorée, des procédés de fabrication de celle-ci, ainsi que des produits pouvant être fabriqués à partir de cette composition. Plus particulièrement, l'invention concerne une composition polymérique thermoplastique comprenant les composants A, B et C suivants: A - un homopolymère de polyfluorure de vinylidène (PVDF) comprenant une fraction de chaînes de très haute masse molaire (FCTHM), notamment une fraction de chaînes non transférées (FCNT) ; B - un copolymère élastomérique de fluorure de vinylidène (VDF) et d'au moins un autre comonomère fluoré copolymérisable avec le VDF, et C - un homopolymère du VDF de basse viscosité. The present invention relates to a fluorinated polymeric composition, methods of making the same, and products that can be made therefrom. More particularly, the invention relates to a thermoplastic polymeric composition comprising the following components A, B and C: A - a vinylidene polyfluoride homopolymer (PVDF) comprising a fraction of chains of very high molar mass (FCTHM), in particular a fraction of non-transferred channels (FCNT); B - an elastomeric copolymer of vinylidene fluoride (VDF) and at least one other fluorinated comonomer copolymerizable with VDF, and C - a homopolymer of VDF of low viscosity.

POWDER COATING BASED ON FLUORINATED POLYMER

L'invention se rapporte à des compositions thermoplastiques fluorées-acryliques, à des revêtements en poudre constitués de telles compositions et à un procédé pour la préparation desdits revêtements en poudre. The invention relates to fluorinated-acrylic thermoplastic compositions, to powder coatings consisting of such compositions and to a process for the preparation of said powder coatings.

EXTRUSION AID AGENT BASED ON PVDF

L'invention est relative à une composition comprenant :● au moins un polymère fluoré (A),● au moins un agent d'interface (B),● au moins un stabilisant (C) de formule (I) dans laquelle Ar1 et Ar2 désignent un groupe aryle.La composition est utilisée comme agent d'extrusion d'une polyoléfine ou d'une résine thermoplastique.L'invention est aussi relative à un procédé d'extrusion consistant :(i) à mettre en contact à l'état solide une composition selon l'invention avec une polyoléfine ou une résine thermoplastique ;(ii) puis à extruder le mélange obtenu en (i) sous forme de film, de tube, de profilé ou de corps creux. The invention relates to a composition comprising: at least one fluorinated polymer (A), at least one interface agent (B), at least one stabilizer (C) of formula (I) in which Ar1 and Ar2 The composition is used as an extrusion agent for a polyolefin or a thermoplastic resin.The invention is also related to an extrusion process consisting of: (i) bringing into contact in the state solid a composition according to the invention with a polyolefin or a thermoplastic resin, (ii) then to extrude the mixture obtained in (i) in the form of film, tube, profile or hollow body.

VINYLIDENE BIOSOURCE DIFLUORIDE MONOMER AND POLYMERS CONTAINING SAME

L'invention concerne le difluorure de vinylidène biosourcé. L'invention concerne également des procédés de préparation du difluorure de vinylidène biosourcé à partir de diverses matières premières renouvelables. L'invention concerne aussi les homopolymères de difluorure de vinylidène obtenus par polymérisation dudit monomère, ainsi que les copolymères obtenus par copolymérisation dudit monomère avec un ou plusieurs co-monomères compatibles. L'invention se rapporte enfin à l'utilisation desdits homopolymères ou copolymères dans des applications telles que le génie chimique ou l'électronique, notamment des appareils électroniques grand public. The invention relates to bio-based vinylidene difluoride. The invention also relates to processes for the preparation of bio-based vinylidene difluoride from various renewable raw materials. The invention also relates to the homopolymers of vinylidene difluoride obtained by polymerization of said monomer, as well as the copolymers obtained by copolymerization of said monomer with one or more compatible co-monomers. The invention finally relates to the use of said homopolymers or copolymers in applications such as chemical engineering or electronics, in particular consumer electronic devices.

THERMODURA MATERIALS IMPROVED IMPROVED SHOCK

MULTILAYER TUBE BASED ON POLYAMIDE AND FLUORINE POLYMER FOR THE TRANSFER OF FLUIDS

MULTILAYER TUBE BASED ON POLYAMIDE AND FLUORINE POLYMER FOR THE TRANSFER OF FLUIDS

FORMULATION OF A POROUS FLUORINATED MEMBRANE IMPLEMENTED BY A STRETCHING METHOD

METHOD OF GRAFTING FLUORINATED POLYMER AND MULTILAYER STRUCTURES COMPRISING THE GRAFT POLYMER

Microcomposite powder used in the manufacture of fuel cell double pole plates and supercapacitor elements comprises carbon-based electroconductive particles covered with fluoro-polymer particles

A microcomposite powder for the production of fuel cell double pole plates or supercapacitor elements comprises 1-300 micron carbon-based electroconductive particles and 0.1-0.5 micron fluoro-polymer particles. Preferred Features: The electroconductive particles are selected from graphite, carbon black aggregates, carbon fibers, carbon nanotubes and activated carbon. The fluoro polymer is a polyvinylidene fluoride (PVDF) homopolymer or copolymer containing at least 60 weight % vinylidene fluoride. The weight proportion of electroconductive particles and fluoro-polymer particles is 10-40 to 90-60. The microcomposite powder can also include up to 5 parts weight of a pore-forming agent per 100 parts of the fluoro-polymer and electroconductive particles combined. The microcomposite powder can also include a product (A) comprising a polymer or oligomer that can be dissolved in a solvent that does not dissolve the fluoro-polymer or the electroconductive material. Independent claims are given for: (a) items comprising the microcomposite powder by co-atomization of one or more emulsions or aqueous dispersions containing the different constituents; (b) fuel cell double pole plates obtained from the microcomposite powder; and (c) a process for preparing the microcomposite powder by (co)-atomization of one or many aqueous emulsions or dispersions containing the different constituents.

Composition useful for producing coextruded polyvinylidene fluoride (PVDF) films comprises PVDF, polymethyl methacrylate, acrylic elastomer and ultraviolet absorber

Composition (I) coextrudable with polyvinylidene fluoride (PVDF) comprises 20-40% PVDF, 40-60% polymethyl methacrylate, 5-18% acrylic elastomer and 1-4% UV absorber. Independent claims are also included for: (1) coextruded films comprising a layer of (I) and a base layer comprising 50-100% polyvinylidene fluoride (PVDF) and 0-50% polymethyl methacrylate (PMMA); (2) coextruded films comprising a layer of (I), a middle layer comprising 50-75% PVDF and 25-50% PMMA, and an outer layer comprising 75-100% PVDF and 0-25% PMMA; (3) substrates covered with a film as above with (I) facing the substrate.

THERMOPLASTIC FLUOROPOLYMER ELASTOMER

L'invention concerne un objet ou une partie d'objet fabriqué à partir d'une composition comprenant au moins un fluoropolymère F, dans lequel : l'au moins un fluoropolymère F comprend des motifs de fluorure de vinylidène et au moins 30 % en poids de motifs dérivés d'au moins un monomère de formule (I) : (I) CX1X2=CX3Y, dans laquelle chacun des X1, X2 et X3 est indépendamment choisi parmi H, Cl, F, Br, I et les groupes alkyle comprenant de 1 à 3 atomes de carbone qui sont optionnellement partiellement ou complètement halogénés et Y est un groupe alkyle comprenant de 1 à 3 atomes de carbone qui est optionnellement partiellement ou complètement halogéné ; - la proportion de l'au moins un fluoropolymère F dans la composition est d'au moins 80 % en poids ; et - la viscosité de la composition est d'au moins 1000 Pa.s à une température de 230 °C et à un taux de cisaillement de 100 s-1. The invention relates to an object or part of an object made from a composition comprising at least one fluoropolymer F, wherein: the at least one fluoropolymer F comprises units of vinylidene fluoride and at least 30% by weight of units derived from at least one monomer of formula (I): (I) CX1X2 = CX3Y, in which each of X1, X2 and X3 is independently selected from H, Cl, F, Br, I and alkyl groups comprising of 1 to 3 carbon atoms which are optionally partially or completely halogenated and Y is an alkyl group comprising from 1 to 3 carbon atoms which is optionally partially or completely halogenated; the proportion of at least one fluoropolymer F in the composition is at least 80% by weight; and - the viscosity of the composition is at least 1000 Pa.s at a temperature of 230 ° C and at a shear rate of 100 s-1.

MULTILAYER TUBE FOR TRANSPORTING WATER OR GAS

Use of a master mixture comprising a fluorinated polymer, an interfacing agent and a polyolefin, as an extrusion agent for a thermoplastic resin filler e.g. polyolefin, styrene resin, polyester or polyvinyl chloride

Use of a master mixture comprising a fluorinated polymer and an interfacing agent at 1-30 wt.%, preferably 2-10 wt.%, and a polyolefin at 70-99 wt.%, preferably 90-98 wt.% as an extrusion agent for thermoplastic resin filler, where the fluorinated polymer and the interfacing agent are mixed at a temperature in a way that its inner mass or its surface is in a molten state and then the obtained mixture is mixed with the polyolefin.

VINYLIDENE FLUORIDE COPOLYMER FUNCTIONALIZED BY IRRADIATION GRAFTING BY AN INSATURE POLAR MONOMER

L'invention est relative à un copolymère du VDF et d'au moins un monomère copolymérisable avec le VDF ayant une teneur en poids en VDF d'au moins 50%, de préférence d'au moins 75% sur lequel est greffé par irradiation au moins un monomère polaire insaturé caractérisé en ce que le copolymère du VDF présente avant le greffage les caractéristiques suivantes :. une température de cristallisation Tc (mesurée par DSC selon la norme ISO 11357-3) allant de 50 et 120 degres C, de préférence de 85 à 110 degres C ;. une contrainte au seuil sigmay allant de 10 à 40 MPa, de préférence de 10 à 30 MPa ;. une viscosité v à l'état fondu (mesurée au rhéomètre capillaire à 230 degres C à 100 s<-1>) allant de 100 à 1500 Pa s, de préférence de 400 à 1200 Pa s.L'invention est aussi relative à un mélange comprenant ce copolymère modifié et un PVDF.Ce copolymère modifié ou le mélange peuvent être associés à un polymère thermoplastique, à un élastomère ou à un matériau inorganique. The invention relates to a copolymer of VDF and of at least one monomer which can be copolymerized with VDF having a VDF content by weight of at least 50%, preferably of at least 75% onto which is grafted by irradiation with least one unsaturated polar monomer characterized in that the VDF copolymer has the following characteristics before grafting :. a crystallization temperature Tc (measured by DSC according to the ISO 11357-3 standard) ranging from 50 and 120 degrees C, preferably from 85 to 110 degrees C ;. a stress at the sigmay threshold ranging from 10 to 40 MPa, preferably from 10 to 30 MPa; a viscosity v in the molten state (measured with a capillary rheometer at 230 degrees C at 100 s <-1>) ranging from 100 to 1500 Pa s, preferably from 400 to 1200 Pa s. The invention also relates to a mixture comprising this modified copolymer and a PVDF. This modified copolymer or the mixture can be combined with a thermoplastic polymer, with an elastomer or with an inorganic ...

Production of grafted fluoropolymers useful for making multilayer structures comprises irradiating a mixture of fluoropolymer and unsaturated monomer in the form of films, sheets, granules or powder

Grafting an unsaturated monomer onto a fluoropolymer comprises mixing the molten fluoropolymer with the monomer, forming the mixture into films, sheets, granules or powder, exposing the products to gamma or beta radiation (1-15 Mrad) in the absence of oxygen and optionally removing any ungrafted monomer. Independent claims are also included for: (1) structures comprising at least one layer of a grafted fluoropolymer produced as above and at least one layer of another material; and (2) bulk-grafted fluoropolymer.

Thermosetting material with improved shock resistance, useful as a shock resistant, comprises a thermosetting resin and a shock modifier

La présente invention concerne un matériau thermodur à tenue au choc améliorée comprenant en poids :. 99 à 20% d'une résine thermodure,. 1 à 80% d'un modifiant choc comprenant au moins un copolymère choisi parmi les copolymères à blocs A-B-C et A-B dans lesquels: chaque bloc est relié à l'autre au moyen d'une liaison covalente ou d'une molécule intermédiaire reliée à l'un des blocs par une liaison covalente et à l'autre bloc par une autre liaison covalente,A est un PMMA homopolymère ou un copolymère de méthacrylate de méthyle et d'au moins un monomère hydrosoluble,C est soit (i) un PMMA homopolymère ou un copolymère de méthacrylate de méthyle et d'éventuellement un monomère hydrosoluble soit (ii) un polymère à base de monomères ou mélange de monomères vinyliques,B est incompatible ou partiellement compatible avec la résine thermodure et incompatible avec le bloc A et l'éventuel bloc C et sa température de transition vitreuse Tg est inférieure à la température d'utilisation du matériau thermodur.L'invention concerne aussi l'utilisation de ces modifiants choc dans les thermodurs.

HUMIDITY-RESISTANT FILM BASED ON FLUORINATED POLYMER AND INORGANIC OXIDE FOR PHOTOVOLTAIC APPLICATION

L'invention a pour objet une structure multicouche comprenant : • une couche d'une composition comprenant un polymère fluoré et d'un oxyde de zinc (ZnO), ledit ZnO étant présent dans ladite composition sous forme de particules dans une proportion massique inférieure à 1%, lesdites particules de ZnO ayant une taille allant de 10 à 100 nm ; • au moins une couche d'oxyde (MOx) choisi parmi l'oxyde de silicium et l'oxyde d'aluminium ayant une épaisseur de 20 à 200nm. Cette structure présente d'excellentes propriétés de transparence dans le domaine visible, d'opacité aux rayonnements UV ainsi qu'une bonne résistance mécanique et au vieillissement tout en ayant d'excellentes propriétés barrière à l'humidité. Cette structure peut ainsi être avantageusement utilisée en face avant de panneaux photovoltaïques ou pour la protection de diodes électroluminescentes organiques. The subject of the invention is a multilayer structure comprising: a layer of a composition comprising a fluorinated polymer and a zinc oxide (ZnO), said ZnO being present in said composition in the form of particles in a mass proportion less than 1%, said ZnO particles having a size ranging from 10 to 100 nm; At least one oxide layer (MOx) chosen from silicon oxide and aluminum oxide having a thickness of 20 to 200 nm. This structure has excellent transparency properties in the visible range, opacity to UV radiation as well as good mechanical strength and aging while having excellent moisture barrier properties. This structure can thus advantageously be used on the front face of photovoltaic panels or for the protection of organic light-emitting diodes.

MULTILAYER STRUCTURE BASED ON A BARRIER POLYMER POSSIBLY REINFORCED WITH IMPACT

L'invention est relative à une structure multicouche comprenant (de l'intérieur vers l'extérieur) :●une couche C1 comprenant au moins un polymère fluoré fonctionnalisé, éventuellement mélangé à au moins un polymère fluoré compatible ;● une couche C2 comprenant au moins un liant d'adhésion ;● une couche C3 comprenant au moins une polyoléfine , de préférence un polyéthylène ;● une couche C4 comprenant au moins un liant d'adhésion ;● une couche barrière C5 comprenant au moins un polymère barrière, éventuellement renforcé à l'impact ;les couches étant disposées l'une contre l'autre dans l'ordre indiqué.Elle est aussi relative à l'utilisation de cette structure multicouche pour stocker ou transférer un carburant. The invention relates to a multilayer structure comprising (from inside to outside): a layer C1 comprising at least one functionalized fluoropolymer, optionally mixed with at least one compatible fluorinated polymer, a layer C2 comprising at least one an adhesion binder ● a layer C3 comprising at least one polyolefin, preferably a polyethylene ● a layer C4 comprising at least one adhesion binder ● a barrier layer C5 comprising at least one barrier polymer, optionally reinforced with polyethylene impact, the layers being arranged against each other in the indicated order.It is also related to the use of this multilayer structure for storing or transferring a fuel.

CONDUCTIVE COMPOSITION BASED ON PVDF

L'invention est relative à une composition conductrice comprenant (en poids) :● de 30 à 60 parts d'un PVDF fluide ;● de 25 à 62 parts d'un PVDF visqueux ;● de 8 à 13 parts d'une charge conductrice ;● de 0 à 2 parts d'un agent ignifugeant ;● de 0 à 0,05 parts d'un agent nucléantle total faisant 100 parts.De préférence, elle comprend en poids :● de 35 à 50 parts d'un PVDF fluide ;● de 45 à 55 parts d'un PVDF visqueux ;● de 8 à 13 parts d'une charge conductrice ;● de 0 à 2 parts d'un agent ignifugeant ;● de 0 à 0,05 parts d'un agent nuctéant ;le total faisant 100 parts.De préférence, la composition conductrice présente une viscosité à l'état fondu à 230 degree C inférieure à 10<6> Pa.s, de préférence comprise entre 10<2> et 10<6> Pa.s.L'invention est aussi relative à des structures multicouches associant la composition conductrice et un polymère thermoplastique ou un métal. The invention relates to a conductive composition comprising (by weight): ● from 30 to 60 parts of a fluid PVDF; ● from 25 to 62 parts of a viscous PVDF; ● from 8 to 13 parts of a conductive filler ; ● from 0 to 2 parts of a flame retardant; ● from 0 to 0.05 parts of a total nucleating agent making up 100 parts. Preferably, it comprises by weight: ● from 35 to 50 parts of a fluid PVDF ; ● from 45 to 55 parts of a viscous PVDF; ● from 8 to 13 parts of a conductive filler; ● from 0 to 2 parts of a flame retardant; ● from 0 to 0.05 parts of a nuctant agent the total being 100 parts. Preferably, the conductive composition has a melt viscosity at 230 degree C of less than 10 <6> Pa.s, preferably between 10 <2> and 10 <6> Pa. The invention also relates to multilayer structures combining the conductive composition and a thermoplastic polymer or a metal.

Multi-layer tube, used to transport gasoline, comprises: an external layer of polyamide; and an interior layer of composition

Multi-layer tube (I) comprises: an external layer (Ia) of polyamide; and an interior layer (Ib) of composition (comprising: mixture (A) (5-30 wt.%) containing a polyethylene carrying epoxy group and an impact modifier (elastomers and very low density polyethylenes; and a mixture (B) (70-95%) comprising a fluorinated polymer (B1) and a functionalized fluorinated polymer (B2) (1-60 wt.%). Multi-layer tube (I) (having radical direction from exterior towards interior) comprises: an external layer (Ia) of polyamide; and an interior layer (Ib) of composition (comprising: mixture (A) (5-30 wt.%) containing a polyethylene carrying epoxy group and an impact modifier (elastomers and very low density polyethylenes; and a mixture (B) (70-95%) comprising a fluorinated polymer (B1) and a functionalized fluorinated polymer (B2) (1-60 wt.%), where the layers are successive and adhere to each other in their respective contact zone.

Multi-layer tube, useful for the transport of gasoline, comprises: an external polyamide layer; and an interior layer of a composition

Multi-layer tube (I) comprises: an external polyamide layer (Ia); and an interior layer (Ib) of a composition (comprising: mixture (A) (5-30 wt.%) containing polyethylene carrying epoxy group and an impact modifier (elastomers and very low density polyethylene); and mixture (B) (95-70 wt.%) comprising a fluorinated polymer (1-60 wt.%) and a functionalized fluorinated polymer). Multi-layer tube (I) comprises (radially directed from exterior towards interior): an external polyamide layer (Ia); and an interior layer (Ib) of a composition (comprising: mixture (A) (5-30 wt.%) containing polyethylene carrying epoxy group and an impact modifier (elastomers and very low density polyethylene) (functionalized as whole or part); and mixture (B) (95-70 wt.%) comprising a fluorinated polymer (1-60 wt.%) and a functionalized fluorinated polymer), where the layers are successive and adhere to one another in their respective contact zone.

Structure, useful in devices for storage or transfer of fluids, comprises a barrier polymer layer, a binding layer and a polyethylene layer, where the layers are adherent in their respective zone of contact

Structure (I) comprises: a barrier polymer layer (A); a binding layer (B) (comprising at least a polyethylene (1-80) carrying epoxy groups, and at least a viscous polymer (99-20) compatible with the polyethylene); a polyethylene layer (C); and optionally (B) and (A), where the layers are adherent in their respective zone of contact. Independent claims are also included for: (1) a device of storage or transfer of fluids, comprising (I), in which (A) is in contact with the fluid stored or transported; and (2) structure comprising (A), (B) and optionally (A).

IMPROVED FIRE-RESISTANT FLUORINATED POLYMER COMPOSITION

STRUCTURE COMPRISING AT LEAST ONE POLYETHYLENE LAYER AND AT LEAST ONE BARRIER POLYMER LAYER

COEXTRUDABLE COMPOSITION WITH PVDF

La présente invention concerne une composition coextrudable avec le PVDF et comprenant :• 20 à 40 parties de PVDF,• 40 à 60 parties de PMMA,• 5 à 18 parties d'un élastomère acrylique,• 1 à 4 parties d'un absorbeur UV,• le total faisant 100 parties.L'invention concerne aussi des films coextrudés constitués :• d'une couche de la composition coextrudable précédente (aussi appelée couche adhésive) et directement attachée à celle ci,• une couche à base de PVDF comprenant comme constituants principaux 50 à 100 parties de PVDF pour respectivement 50 à 0 parties de PMMA (cette couche est aussi appelée par simplification "couche de PVDF").Selon une deuxième forme de l'invention la couche de PVDF se présente sous forme de 2 couches :• l'une disposée contre la couche coextrudable et comprenant comme constituants principaux 50 à 90 parties de PVDF pour respectivement 50 à 10 parties de PMMA,• l'autre (appellée aussi couche extérieure) comprenant comme constituants principaux 75 à 100 parties de PVDF pour respectivement 25 à 0 parties de PMMA.L'invention concerne aussi les substrats revêtus de ce film, la composition coextrudable (adhésive) étant disposée contre le substrat. The present invention relates to a composition coextrudable with PVDF and comprising: • 20 to 40 parts of PVDF, • 40 to 60 parts of PMMA, • 5 to 18 parts of an acrylic elastomer, • 1 to 4 parts of a UV absorber , • the total being 100 parts. The invention also relates to coextruded films consisting of: • a layer of the preceding coextrudable composition (also called adhesive layer) and directly attached thereto, • a PVDF-based layer comprising as main constituents 50 to 100 parts of PVDF for respectively 50 to 0 parts of PMMA (this layer is also called for simplicity "PVDF layer"). According to a second form of the invention the PVDF layer is in the form of 2 layers : • one placed against the coextrudable layer and comprising as main constituents 50 to 90 parts ...

BINDER FOR ATTACHING MATERIAL CONTAINING VINYLIDENE POLYFLUORIDE TO A METAL - ELECTRODE FOR LITHIUM ION BATTERY

La présente invention concerne un liant utilisable dans une batterie lithium-ion et comprenant au moins un polymère de fluorure de vinylidène et au moins un copolymère acrylique comportant des monomères ayant des groupements fonctionnels présentant une affinité pour les métaux ou aptes à se fixer sur les métaux. Selon l'invention, de manière caractéristique, ledit polymère de fluorure de vinylidène est tel qu'une solution de N-méthyl-2-pyrrolidone contenant 5% en masse dudit polymère de fluorure de vinylidène présente une viscosité, mesurée à 23°C avec une vitesse de cisaillement imposée de 30 tours/min, allant de 125 mPa. à 1500 mPa.s. The present invention relates to a binder that can be used in a lithium-ion battery and comprising at least one vinylidene fluoride polymer and at least one acrylic copolymer comprising monomers having functional groups having an affinity for metals or capable of being attached to metals. . According to the invention, typically, said vinylidene fluoride polymer is such that a solution of N-methyl-2-pyrrolidone containing 5% by weight of said vinylidene fluoride polymer has a viscosity, measured at 23 ° C. with an imposed shear rate of 30 rpm, ranging from 125 mPa. at 1500 mPa.s.

ELECTRODE FORMULATION FOR LI-ION BATTERY AND SOLVENTLESS ELECTRODE MANUFACTURING METHOD

La présente invention a trait de manière générale au domaine du stockage d’énergie électrique dans des batteries secondaires rechargeables de type Li-ion. Plus précisément, l’invention concerne une formulation d’électrode pour batterie Li-ion, comprenant un liant à base d’un mélange de polymères fluorés. L’invention concerne aussi un procédé de préparation d’électrodes mettant en œuvre ladite formulation, par une technique de dépôt sans solvant sur un substrat métallique. L’invention se rapporte enfin à une électrode obtenue par ce procédé ainsi qu’aux batteries secondaires Li-ion comprenant au moins une telle électrode. The present invention generally relates to the field of the storage of electrical energy in rechargeable secondary batteries of the Li-ion type. More specifically, the invention relates to an electrode formulation for a Li-ion battery, comprising a binder based on a mixture of fluorinated polymers. The invention also relates to a process for preparing electrodes implementing said formulation, by a technique of deposition without solvent on a metal substrate. The invention finally relates to an electrode obtained by this process as well as to Li-ion secondary batteries comprising at least one such electrode.

THIN FILM FOR PHOTOVOLTAIC CELL

USE OF POLYMER COMPOSITIONS FOR COATING SURFACES AND COATING OF SURFACES COMPRISING SUCH COMPOSITIONS

HYDROPHILIC PLATE BASED ON FLUORINATED POLYMER

PVDF MULTILAYER POLYMERIC FILM - PRESSURE-SENSITIVE ADHESIVE

PVDF MULTILAYER POLYMERIC FILM - PRESSURE-SENSITIVE ADHESIVE

La présente invention concerne un film polymère multicouche et particulièrement un film comprenant une couche de polyfluorure de vinylidène (PVDF) et une couche d'adhésif sensible à la pression. De manière caractéristique, la couche de PVDF est une structure de type A/B/C qui comprend : - une première couche de composition A comprenant 100% en poids d'un homopolymère ou d'un copolymère de fluorure de vinylidène et d'un comonomère copolymérisable avec le fluorure de vinylidène ; - une seconde couche de composition B, comprenant, en poids, 30 à 75% d'un homopolymère ou copolymère de fluorure de vinylidène, de 5 à 45% d'un homopolymère ou copolymère de méthacrylate de méthyle et de 10 à 30% d'au moins une charge minérale; - une troisième couche de composition C comprenant 100% en poids d'un homopolymère ou d'un copolymère de fluorure de vinylidène et d'un comonomère copolymérisable avec le fluorure de vinylidène. The present invention relates to a multilayer polymeric film and particularly to a film comprising a polyvinylidene fluoride (PVDF) layer and a pressure-sensitive adhesive layer. Typically, the PVDF layer is an A / B / C type structure which comprises: a first layer of composition A comprising 100% by weight of a homopolymer or a copolymer of vinylidene fluoride and a comonomer copolymerizable with vinylidene fluoride; a second layer of composition B, comprising, by weight, 30 to 75% of a homopolymer or copolymer of vinylidene fluoride, of 5 to 45% of a homopolymer or copolymer of methyl methacrylate and of 10 to 30% of at least one mineral filler; - A third layer of composition C comprising 100% by weight of a homopolymer or a copolymer of vinylidene fluoride and a comonomer copolymerizable with vinylidene fluoride.

Electroconductive- and fluoropolymer-based microcomposite powder, and objects manufactured with said powder

La présente invention concerne une poudre microcomposite comprenant des particules de 1 à 300 .mu.m d'un produit électroconducteur recouvertes de particules de 0,1 à 0,5 .mu.m d'un fluoropolymère. Selon une forme avantageuse de l'invention, la poudre microcomposite comprend un produit qui est un polymère ou un oligomère pouvant être solubilisé par un solvant qui n'est pas un solvant du fluoropolymère ni du produit électroconducteur. La présente invention concerne aussi les objets constitué s de cette poudre. Ces objets peuvent être des plaques bipolaires de piles à combustible, ou des éléments de supercapacités. The present invention relates to a microcomposite powder comprising particles of 1 to 300 μm of an electroconductive product covered with particles of 0.1 to 0.5 μm of a fluoropolymer. According to an advantageous form of the invention, the microcomposite powder comprises a product which is a polymer or an oligomer which can be dissolved by a solvent which is not a solvent for the fluoropolymer or for the electroconductive product. The present invention also relates to the objects consisting of this powder. These objects can be bipolar plates of fuel cells, or elements of supercapacitors.

BINDER FOR ATTACHING MATERIAL CONTAINING VINYLIDENE POLYFLUORIDE TO A METAL - ELECTRODE FOR LITHIUM ION BATTERY

La présente invention concerne un liant utilisable dans une batterie lithium-ion et comprenant au moins un polymère de fluorure de vinylidène et au moins un copolymère acrylique comportant des monomères ayant des groupements fonctionnels présentant une affinité pour les métaux ou aptes à se fixer sur les métaux. Selon l'invention, de manière caractéristique, ledit polymère de fluorure de vinylidène est tel qu'une solution de N-méthyl-2-pyrrolidone contenant 5% en masse dudit polymère de fluorure de vinylidène présente une viscosité, mesurée à 23°C avec une vitesse de cisaillement imposée de 30 tours/min, allant de 125 mPa. à 1500 mPa.s. The present invention relates to a binder that can be used in a lithium-ion battery and comprising at least one vinylidene fluoride polymer and at least one acrylic copolymer comprising monomers having functional groups having an affinity for metals or capable of being attached to metals. . According to the invention, typically, said vinylidene fluoride polymer is such that a solution of N-methyl-2-pyrrolidone containing 5% by weight of said vinylidene fluoride polymer has a viscosity, measured at 23 ° C. with an imposed shear rate of 30 rpm, ranging from 125 mPa. at 1500 mPa.s.

EXTRUSION AID AGENT BASED ON PVDF

Tube, useful e.g. in the transport of aggressive fluids, comprises: an interior layer (comprising a modified fluorinated polymer and optionally an electro conducting product); optionally binding layer; and a vulcanized elastomer layer

Tube (I), comprises: an interior layer (A) (comprising a modified fluorinated polymer (which is grafted by irradiation of a compound mixed with a fluorinated polymer) and optionally an electro conducting product) in contact with a circulating fluid; optionally binding layer; and a vulcanized elastomer layer.

Electric and/or optic cable insulation structure, has polyolefin and adhesive binder layers, third layer with fluorinated polymer to which unsaturated monomer is grafted by radiation, and fourth layer with fluorinated polymer

The structure has an internal layer (L1) of polyolefin, or a functionalized polyolefin, or a mixture of the polyolefin and the functionalized polyolefin. The structure has a layer (L2) of an adhesive binder and comprises polyolefin and has a layer (L3) with a fluorinated polymer to which an unsaturated monomer is grafted by radiation. The structure has a layer (L4) with a fluorinated polymer. The polyolefin of the layer (L1) has chemical functions which react with that of the layer (L2). The grafted unsaturated monomer reacts with the chemical functions of the layer (L2). An independent claim is also included for an electric cable comprising an electric conductor and an insulated optic transmission unit that are insulated by a multilayer insulation structure.

USE OF MODIFIED FLUORINE POLYMER FOR THE TRANSPORT OF WATER OR GAS

Composition, useful in structure and device for storage and transfer of fluids, comprises: a mixture comprising polyethylene and impact modifier; and a mixture comprising fluorinated polymer and functionalized fluorinated polymer

Composition (I) comprises: a mixture (II) (5-30 wt.%) comprising a polyethylene carrying epoxy group and an impact modifier (entirely or partly functionalized) (elastomers or very low density polyethylenes); and a mixture (III) (95-70 wt.%) comprising a fluorinated polymer (IIIa) and a functionalized fluorinated polymer (IIIb) (1-60 wt.%). Independent claims are also included for: (1) a structure comprising a layer made up of (I); and (2) a device for the storage or transfer of fluids comprising the structure.

Coated metallic surface, comprising a layer comprising a primer placed on a metallic surface and a binding layer comprising a fluorinated polymer modified by grafting by irradiation, successively

Coated metallic surface (I), comprising a layer (L1) comprising a primer (P1) placed on a metallic surface and a binding layer (L2) comprising a fluorinated polymer (P2) modified by grafting by irradiation, successively. An independent claim is also included for a metallic tube coated on its internal and/or external surface with a coating.

VINYLIDENE FLUORIDE COPOLYMER FUNCTIONALIZED BY IRRADIATION GRAFTING BY UNSATURATED POLAR MONOMER

HUMIDITY-RESISTANT FILM BASED ON FLUORINATED POLYMER AND INORGANIC OXIDE FOR PHOTOVOLTAIC APPLICATION

ORGANIC FIBER BASED ON EPOXY RESIN AND RHEOLOGY REGULATING AGENT AND CORRESPONDING FABRICS

Multi-layer tube, useful to transport (hot)water, chemicals and gas, comprises optionally fluorinated polymer layers, adhesive layer, polyolefin layer, barrier layer and polyolefin layer

L'invention est relative à un tube multicouche comprenant (dans l'ordre de l'intérieur vers l'extérieur du tube) :● éventuellement une couche C1 comprenant au moins un polymère fluoré ;● une couche C2 comprenant au moins un polymère fluoré greffé par irradiation, éventuellement en mélange avec au moins un polymère fluoré ;● éventuellement une couche C3 comprenant au moins une polyoléfine fonctionnalisée, éventuellement en mélange avec au moins une polyoléfine, cette couche C3 étant directement attachée à la couche C2 contenant le polymère fluoré greffé par irradiation ;● une couche C4 comprenant au moins une polyoléfine, directement attachée à la couche C3 éventuelle ou bien à la couche C2 ;● une couche barrière C5 ;● éventuellement une couche C6 comprenant au moins une polyoléfine.

MIXING OF MODIFIED PVDF BY IRRADIATION GRAFTING AND TFE POLYMER

THERMOFORMABLE MULTILAYER FILM FOR THE PROTECTION OF SUBSTRATES AND OBJECTS OBTAINED

MULTILAYER STRUCTURE BASED ON FLUORINATED POLYMER AND PVC

Pvdf-based ptc paints and their applications for self-regulated heating systems

The present invention relates to a composition comprising, by weight, the total being 100%: A) ~40 to 80% of vinylidene fluoride homopolymers or copolymers, (PVDF); B) ~10 to 40% of PMMA; and C) ~10 to 40% of a conductive filler. wherein PMMA is methyl methacrylate homopolymers and copolymers containing at least 50 wt% methyl methacrylate. This composition has a PTC effect and is advantageously used in the form of a film (paint) covering a substrate. The composition of the invention is dissolved in a solvent and then spread over a substrate and the solvent evaporated. The metal terminals for connection to the electrical circuit may be placed at the ends of the coating before or after application. The invention also relates to a composite, namely the substrate covered with the PTC composition described above.

EXTRUSION AGENT BASED ON PVDF

FLUORINATED COMPOSITION CONTAINING UV ABSORBER AND USE THEREOF AS TRANSPARENT PROTECTIVE LAYER

La présente invention a pour objet des compositions à base de polymères fluorés et leurs utilisations pour la fabrication de films monocouche ou multicouche transparents destinés à protéger divers substrats polymères. La composition polymère consiste en au moins un polymère à base de fluorure de vinylidène, au moins un polymère acrylique et au moins un absorbeur UV, la proportion massique dudit polymère fluoré étant de 60 à 90%, la proportion massique dudit absorbeur UV étant de 0,5 à 5% et la masse moléculaire de ce dernier étant supérieure à 500 g/mole. The subject of the present invention is compositions based on fluoropolymers and their uses for the manufacture of transparent monolayer or multilayer films intended to protect various polymer substrates. The polymer composition consists of at least one vinylidene fluoride-based polymer, at least one acrylic polymer and at least one UV absorber, the mass proportion of said fluoropolymer being 60 to 90%, the mass proportion of said UV absorber being 0 , 5 to 5% and the molecular weight of the latter being greater than 500 g / mol.

FILM BASED ON FLUORINATED POLYMER FOR PHOTOVOLTAIC APPLICATION

La présente invention concerne une composition comprenant un polymère fluoré et deux charges inorganiques blanches, ladite composition étant destinée à la fabrication de films monocouche de faible épaisseur, opaques à la lumière visible et aux rayons UV, utilisables notamment dans le domaine des cellules photovoltaïques. Cette composition est constituée d'au moins un polymère fluoré et de deux charges inorganiques blanches, qui sont l'oxyde de zinc et l'oxyde de titane ; elles sont présentes dans une proportion massique allant de 5 à 30% et de 3 à 7,5% respectivement. Ladite composition comprend en outre moins de 5% en poids de polymère acrylique, par rapport au poids total de la composition. The present invention relates to a composition comprising a fluoropolymer and two white inorganic fillers, said composition being intended for the production of monolayer films of small thickness, opaque to visible light and to UV rays, used in particular in the field of photovoltaic cells. This composition consists of at least one fluorinated polymer and two white inorganic fillers, which are zinc oxide and titanium oxide; they are present in a mass proportion ranging from 5 to 30% and from 3 to 7.5% respectively. Said composition also comprises less than 5% by weight of acrylic polymer, relative to the total weight of the composition.

Use of a fluorinated polymer modified by grafting by irradiation of a graftable compound on a fluorinated polymer, to form a coating protecting the surface of an inorganic material against corrosion

La présente invention concerne l'utilisation d'un polymère fluoré modifié par irradiation pour former un revêtement protégeant la surface d'un matériau inorganique contre la corrosion.L'expression surface d'un substrat inorganique désigne une surface en métal, en verre, en quartz, en céramique, en béton ou bien en silicium.Le polymère fluoré modifié peut être appliqué sur le substrat à l'état fondu, à l'état de poudre ou bien en solution dans un solvant pour former la couche de revêtement protecteur.

FORMULATION OF A POROUS FLUORINATED MEMBRANE IMPLEMENTED BY A STRETCHING METHOD

La présente invention concerne une nouvelle formulation de polymères thermoplastiques à base de polyfluorure de vinylidène (PVDF), ainsi qu'aux membranes fabriquées à partir de cette formulation. Plus spécifiquement, ladite formulation polymérique consiste en une matrice en PVDF homopolymère et un copolymère VDF-HFP dans lequel le taux d'HFP est compris entre 15% et moins de 50% en poids, par rapport au poids du copolymère. L'invention se rapporte également au procédé de préparation de membranes poreuses à partir de ladite formulation, comprenant plusieurs étapes d'étirage. Les membranes ainsi obtenues ont diverses applications, notamment dans la filtration de l'eau, dans le domaine du stockage d'énergie (batteries Li-ion par exemple) comme séparateurs d'électrodes, etc. The present invention relates to a new formulation of thermoplastic polymers based on polyvinylidene fluoride (PVDF), as well as membranes made from this formulation. More specifically, said polymeric formulation consists of a homopolymeric PVDF matrix and a VDF-HFP copolymer in which the level of HFP is between 15% and less than 50% by weight, based on the weight of the copolymer. The invention also relates to the process for preparing porous membranes from said formulation, comprising several stretching steps. The membranes thus obtained have various applications, in particular in the filtration of water, in the field of energy storage (Li-ion batteries for example) as electrode separators, etc.

USE OF IRRADIATION GRAFTED FLUORINATED POLYMER TUBE FOR TRANSPORTING PRESSURIZED FLUIDS

TRANSPARENT POLYAMIDE / POLYACRYLIC HYBRID MATERIALS WITH IMPROVED THERMOMECHANICAL AND CHEMICAL PERFORMANCE

Multi-layer tube, used to transport cooling liquid comprises: an external layer of polyamide and interior layer of composition

Multi-layer tube (I) comprises: an external layer (Ia) of polyamide; and an interior layer (Ib) (comprising: mixture (A) (5-30 wt.%) containing a polyethylene carrying epoxy group and an impact modifier (elastomers or very low density polyethylenes) (functionalized fully or partly); and mixture (B) (70-95 wt.%) comprising a fluorinated polymer (B1) and a functionalized fluorinated polymer (B2) (1-60 wt.%). Multi-layer tube (I) comprises (having radial direction from exterior towards interior) comprises: an external layer (Ia) of polyamide; and an interior layer (Ib) of composition (comprising: mixture (A) (5-30 wt.%) containing a polyethylene with the epoxy group and an impact modifier (elastomers or very low density polyethylenes) (functionalized whole or part); and mixture (B) (70-95 wt.%) comprising a fluorinated polymer (B1) and a functionalized fluorinated polymer (B2) (1-60 wt.%), where the layers are successive and adhere to each other in their respective contact zone.

Process for producing thermally stable and highly crystalline vinylidene fluoride polymers

L'invention concerne un procédé de polymérisation d'au moins un monomère comprenant un monomère de fluorure de vinylidène, le procédé comprenant la mise en contact de l'au moins un monomère avec un amorceur de polymérisation et un agent oxydant, l'amorceur de polymérisation répondant à la formule (I) : (RfSO2 -)xMx + dans laquelle Rf est un groupement fluoroalkyle comprenant de 1 à 3 atomes de carbone ; et Mx+ est choisi parmi un cation monovalent, ou un cation divalent, ou un cation trivalent, ou un cation tétravalent. Figure pour l’abrégé : Fig. 1 The invention relates to a process for the polymerization of at least one monomer comprising a vinylidene fluoride monomer, the process comprising bringing the at least one monomer into contact with a polymerization initiator and an oxidizing agent, the polymerization corresponding to formula (I): (RfSO2 -)xMx + in which Rf is a fluoroalkyl group comprising from 1 to 3 carbon atoms; and Mx+ is selected from a monovalent cation, or a divalent cation, or a trivalent cation, or a tetravalent cation. Figure for abstract: Fig. 1

SYNTHESIS OF POLY (VINYLIDENE FLUORIDE) LATEX WITHOUT SURFACTANT BY RAFT EMULSION POLYMERIZATION

La présente invention concerne un procédé de production d'un latex fluoré stable par polymérisation en émulsion en l'absence de tensioactif fluoré, stabilisé par un copolymère séquencé amphiphile formé in situ. L'invention concerne en outre la dispersion aqueuse comprenant les chaînes de polymère fluoré et les copolymères séquencés amphiphiles, obtenue par ce procédé. The present invention relates to a process for producing a stable fluorinated latex by emulsion polymerization in the absence of fluorinated surfactant, stabilized by an amphiphilic block copolymer formed in situ. The invention further relates to the aqueous dispersion comprising the fluoropolymer chains and the amphiphilic block copolymers obtained by this method.

INSULATING MULTILAYER STRUCTURE

Multi-layer tube, useful for the transport of gasoline, comprises: an external polyamide layer; and an interior layer of a composition

La présente invention concerne un tube multicouche comprenant dans sa direction radiale de l'extérieur vers l'intérieur :une couche extérieure (1) en polyamide,une couche intérieure (2) d'une composition comprenant, le total étant 100%:5 à 30% en poids d'un mélange (A) comprenant :un polyéthylène portant des fonctions époxy,un modifiant choc choisi parmi les élastomères et les polyéthylènes de très basse densité, ledit modifiant choc étant en tout ou partie fonctionnalisé,95 à 70% en poids d'un mélange (B) comprenant :un polymère fluoré (B1),un polymère fluoré fonctionnalisé (B2),la proportion de (B2) est comprise entre 1 et 60% en poids de (A)+(B), les couches étant successives et adhérant entre-elles dans leur zone de contact respective. La couche intérieure est la couche en contact avec le fluide transporté.La couche (2) peut être conductrice. On peut aussi disposer une couche de polyamide (3) du coté de la couche (2), cette couche devient la couche intérieure.Le tube de la présente invention est très peu perméable à l'essence particulièrement aux hydrocarbures et à leurs additifs, en particulier les alcools comme le méthanol et l'éthanol ou encore les éthers comme le MTBE ou l'ETBE. Ces tubes ont aussi une bonne tenue aux carburants et aux huiles de lubrification du moteur.Ce tube présente de très bonnes propriétés mécaniques à basse ou à haute température.L'invention concerne aussi l'utilisation de ces tubes pour le transport d'essence.

FLUORINATED POLYMER MASTER MIXTURE AND USE THEREOF FOR THE EXTRUSION OF POLYOLEFINS

La présente invention concerne un mélange maître comprenant en poids:• 1 à 50% d'un mélange d'au moins un polymère fluoré (A) et d'au moins un agent d'interface (B),• 99 à 50% d'une polyoléfine (C),• tel que les deux constituants (A) et (B) ont été d'abord mélangés de façon intime en milieu fondu à basse température pour que l'un au moins soit à l'état fondu dans sa masse ou à sa surface, puis sont ensuite mélangés avec la polyoléfine (C).L'invention concerne aussi l'utilisation de ce mélange maître comme processing aid pour extruder des polyoléfines (D). The present invention relates to a masterbatch comprising by weight: • 1 to 50% of a mixture of at least one fluoropolymer (A) and of at least one interface agent (B), • 99 to 50% d 'a polyolefin (C), • such that the two constituents (A) and (B) were first mixed intimately in a molten medium at low temperature so that at least one is in the molten state in its mass or on its surface, then are then mixed with the polyolefin (C). The invention also relates to the use of this masterbatch as a processing aid for extruding polyolefins (D).

ELECTRODE FORMULATION FOR LI-ION BATTERY AND SOLVENT-FREE ELECTRODE MANUFACTURING PROCESS

La présente invention a trait de manière générale au domaine du stockage d’énergie électrique dans des batteries secondaires rechargeables de type Li-ion. Plus précisément, l’invention concerne une formulation d’électrode pour batterie Li-ion, comprenant un liant à base d’un mélange de polymères fluorés. L’invention concerne aussi un procédé de préparation d’électrodes mettant en œuvre ladite formulation, par une technique de dépôt sans solvant sur un substrat métallique. L’invention se rapporte enfin à une électrode obtenue par ce procédé ainsi qu’aux batteries secondaires Li-ion comprenant au moins une telle électrode. The present invention relates generally to the field of electrical energy storage in rechargeable secondary batteries of Li-ion type. More specifically, the invention relates to an electrode formulation for a Li-ion battery, comprising a binder based on a mixture of fluoropolymers. The invention also relates to a process for preparing electrodes using said formulation, by a solvent-free deposition technique on a metal substrate. Finally, the invention relates to an electrode obtained by this process as well as to secondary Li-ion batteries comprising at least one such electrode.

Multilayer tube for transporting water or gas

L'invention est relative à un tube multicouche comprenant (dans l'ordre d e l'intérieur vers l'extérieur du tube) disposées l'une contre l'autre : éve ntuellement une couche L1 comprenant au moins un polymère fluoré, de préfére nce un PVDF; une couche L2 comprenant au moins un PVDF fonctionalisé, obtenu par le greffage par irradiation d'au moins un monomère polaire insaturé sur un PVDF; éventuellement une couche L3 d'un liant d'adhésion; une couche L4 comprenant au moins une polyoléfine éventuellement mélangée à au moins une p olyoléfine fonctionalisée; éventuellement une couche barrière L5; éventuelle ment une couche L6 comprenant au moins une polyoléfine, éventuellement en mé lange avec au moins une polyoléfine fonctionalisée; caractérisé en ce que le PVDF sur lequel est greffé le monomère polaire insaturé est un copolymère d u VDF dont la teneur en poids est d'au moins 50%, de préférence au moins 75% et d'au moins un monomère copolymérisable avec le VDF, présentant les carac téristiques suivantes : une température de cristallisation Tc (mesurée par D SC selon la norme ISO 11357-3) allant de 50 et 120°C, de préférence de 85 à 110°C; une contrainte au seuil y allant de 10 à 40 MPa, de préférence de 10 à 30 MPa; une viscosité v à l'état fondu (mesurée au rhéomètre capillaire à 230°C à 100 s-1) allant de 100 à 1500 Pa s, depréférence de 400 à 1200 Pa s. The invention relates to a multilayer tube comprising (in order from the inside to the outside of the tube) arranged one against the other: eventually a layer L1 comprising at least one fluorinated polymer, preferably nce a PVDF; a L2 layer comprising at least one functionalized PVDF, obtained by the irradiation grafting of at least one unsaturated polar monomer on a PVDF; optionally a layer L3 of an adhesion binder; a layer L4 comprising at least one polyolefin optionally mixed with at least one functionalized olyolefin; optionally a barrier layer L5; optionally a layer ...

Fluorinated polymer composition, used e.g. in pipe for conveying fluid pressure, comprises optionally plasticizer with fluoropolymer, shock modifying particles of core-shell type, and homopolymer or copolymer of vinylidene fluoride

Fluorinated polymer composition (I), comprises optionally at least a compatible plasticizer with the fluoropolymer (1-6 (preferably 2-5) parts); shock modifying particles 4-10 (preferably 5-8 parts) of core-shell type that contains at least one inner layer with a soft polymer of glass transition temperature (T g) of less than -25[deg] C, preferably less than -60[deg] C and acrylic shell; and at least one homopolymer or copolymer of vinylidene fluoride (VDF) (make up to 100 parts), where the modifying particles have interparticle distance (D1) of at most 150 nm, preferably at most 100 nm. An independent claim is included for a flexible metal conduit with one or more elements metal and at least one layer comprising (I) and optionally one or more layers of a polymer material.

FLUORINATED POLYMER WITH ANTIBACTERIAL ACTIVITY

COEXTRUDABLE COMPOSITION WITH PVDF

Multi-layer tube, useful to transport (hot) water, chemicals and gas, comprises optionally fluorinated polymer layers, adhesive layer, polyolefin layer, barrier layer and polyolefin layer

Multi-layer tube (from the inside to the outside of the tube) comprises: optionally a fluorinated polymer layer (I); a fluorinated polymer layer (II), where at least one of the monomer is grafted on it by the radiation and optionally mixed with a fluorinated polymer; optionally a adhesive layer (III), where the (III) layer is directly bound to the layer (II); a polyolefin layer (IV) is optionally mixed with a functionalized polyolefin, which is directly bound to the optional layer (III) or with the (II) layer; optionally a barrier layer (V); and optionally a polyolefin layer (VI). Independent claims are included for: (1) the preparation of the tube; and (2) a heating system by radiant comprising the tube.