Abstract: The invention relates to a method for synthesising a block copolymer alloy including at least one rigid polyamide block PA, including the steps of: a) producing said block copolymer; b) adding, during step a) and to at least a portion of said block copolymer, 0.1 to 30 wt % of at least one organic salt in the molten state relative to the total weight of the alloy, so that the alloy thus obtained has improved antistatic properties and identical mechanical properties when compared to the same polymer produced without adding an organic salt. The invention also relates to a block copolymer alloy having improved antistatic properties and obtained by said method, to the use thereof in a polymer matrix, and to a composition containing same.

Abstract: The invention relates to a multilayer pipe which comprises (in the following order, from the inside of the pipe outwards): optionally, a layer C1 of a fluoropolymer; a layer C2 of 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 C3 being directly attached to the layer C2 containing the radiation-grafted fluoropolymer; a layer C4 of a polyolefin optionally blended with a functionalized polyolefin, directly attached to the optional layer C3 or else to the layer C2; optionally, a barrier layer C5; and optionally, a layer C6 of a polyolefin.

Abstract: The invention relates to a method for the impregnation of continuous fibers that comprises coating said fibers with a polymer matrix containing: (a) at least one fluorinated polymer grafted with at least one carboxylic polar function and (b) optionally at least one fluorinated nongrafted polymer. The invention also relates to the composite fibers that can be obtained by said method and to the use thereof.

Abstract: The invention relates to a coating composition comprising a radiation grafted functionalized fluoropolymer. This coating is preferably, in the form of a powder coating. The coating can be used on inorganic substrates, especially un-primed metals. The invention also relates to the coated inorganic substrate and to the use of the coating composition to protect the inorganic substrate, especially from corrosion.

Abstract: The invention concerns a conductive composition comprising (by weight): 30 to 60 parts of a fluid PVDF; 25 to 62 parts of a viscous PVDF; 8 to 13 parts of a conductive filler; 0 to 2 parts of a fire retardant agent; 0 to 0.05 parts of a nucleating agent, based on a total of 100 parts. Preferably, it comprises by weight: 35 to 50 parts of a fluid PVDF; 45 to 55 parts of a viscous PVDF; 8 to 13 parts of a conductive filler; 0 to 2 parts of a fireproof agent; 0 to 0.05 parts of a nucleating agent, based on a total of 100 parts. Preferably, the conductive composition has a viscosity in the molten state at 230° C. of less than 106 Pa·s, preferably between 102 and 106 Pa·s. The invention also concerns multilayer structures combining the conductive composition and a thermoplastic polymer or a metal.

Abstract: The invention relates to a method for synthesising a block copolymer alloy including at least one rigid polyamide block PA, including the steps of: a) producing said block copolymer; b) adding, during step a) and to at least a portion of said block copolymer, 0.1 to 30 wt % of at least one organic salt in the molten state relative to the total weight of the alloy, so that the alloy thus obtained has improved antistatic properties and identical mechanical properties when compared to the same polymer produced without adding an organic salt. The invention also relates to a block copolymer alloy having improved antistatic properties and obtained by said method, to the use thereof in a polymer matrix, and to a composition containing same.

Abstract: The present invention relates to a method for radiation grafting a compound by irradiation, that can be grafted onto a fluoropolymer, so as to prevent destabilization of the fluorinated polymer. Said method comprises the following steps: a) the fluoropolymer is mixed in the melted state thereof with a graftable compound; b) the mixture obtained in a) is converted into films, plates, granulates or powder; c) the products from step b) are subjected to photonic (?) or electronic (?) irradiation in a dose of between 0.5 and 15 Mrad; and d) optionally, the products from step c) are washed and/or a degassed. According to said method, a stabilizing agent is added to the fluorinated polymer. Said stabilizing agent can be an antioxidant, a graftable metal salt, or a combination of the two. The invention also relates to structures comprising at least one layer of said mixtures and at least one layer of another material, and to the use of said structures to obtain a barrier effect.

Abstract: The present invention pertains to the use of nanotubes of at least one chemical element chosen from elements of groups IHa, IVa and Va of the periodic table to improve the high temperature mechanical properties of a polymeric matrix comprising at least one semi-crystalline thermoplastic polymer.

Abstract: The invention relates to a method for the impregnation of continuous fibers that comprises coating said fibers with a polymer matrix containing: (a) at least one fluorinated polymer grafted with at least one carboxylic polar function and (b) optionally at least one fluorinated nongrafted polymer. The invention also relates to the composite fibers that can be obtained by said method and to the use thereof.

Abstract: Described is a process for making closed cell fluoropolymer foam, and the foam so made. The process includes subjecting a fluoropolymer resin an inert gas at a pressure higher than atmospheric to drive gas into the resin, raising the temperature of the resin to or above its softening point, and reducing the pressure while maintaining the temperature at or above the softening point of the resin, in order to expand the resin to result in closed cell fluoropolymer foam. The resin is cross-linked prior to expansion. The resulting foams can be used in various applications, such as in flotation devices and for making thermal and/or acoustic insulation.

Abstract: The invention relates to a method for the impregnation of continuous fibers, that comprises coating said fibers with a polymer matrix containing at least one thermoplastic semicrystalline polymer having a glass transition temperature (Tg) lower than or equal to 130° C., and nanotubes of at least one chemical element selected from the elements of the columns IIIa, IVa and Va of the periodic table. The invention also relates to the composite fibres that can be obtained by said method, and to the use thereof.

Abstract: The invention relates to a composite material including nanotubes of a chemical element selected from the compounds of the elements of columns IIIa, IVa and Va of the periodic table, dispersed in a polymer matrix including (a) at least one fluorinated homo- or copolymer and (b) at least one fluorinated homo- or copolymer grafted with at least one carboxylic polar function. The invention also relates to the use of the composite material and to the use of at least one fluorinated homo- or copolymer grafted with at least one carboxylic polar function for increasing the tensile strength of a composite material containing the above nanotubes dispersed in a fluorinated polymer matrix.

Abstract: The invention relates to multilayer tube comprising (from the inside to the outside of the tube): an optional layer (C1) consisting of at least one fluorinated polymer; a layer (C2) consisting of a mixture containing at least one functionalized fluorinated polymer and at least one flexible fluorinated polymer having a tensile modulus of between 50 and 1000 MPa (measured in accordance with ISO R 527 standard at 23° C.), advantageously between 100 and 750 MPa and preferably between 200 and 600 MPa; an optional layer (C3) of adhesive binder; a layer (C4) consisting of at least one polyolefin or a mixture of at least one polyolefin with at least one functionalized polyolefin; a barrier layer (C5); and an optional layer (C6) consisting of least one polyolefin.

Abstract: The invention relates to a conducting composition comprising, (by weight): 30 to 60 parts of a fluid PVDF; 25 to 62 parts of a viscous PVDF; 8 to 13 parts of a conducting filler; 0 to 2 parts of a fire retardant; and 0 to 0.05 parts of a nucleating agent, the total making 100 parts. Preferably, it comprises, by weight: 35 to 50 parts of a fluid PVDF; 45 to 55 parts of a viscous PVDF; 8 to 13 parts of a conducting filler; 0 to 2 parts of a fire retardant; and 0 to 0.05 parts of a nucleating agent, the total making 100 parts. Preferably, the conducting composition has a melt viscosity at 230° C. of less than 106 Pa·s, preferably between 102 and 106 Pa·s. The invention also relates to multilayer structures combining the conducting composition with a thermoplastic polymer or a metal.

Abstract: The invention concerns a multilayer tube comprising (viewed form inside outwards of the tube): optionally a layer C1 comprising at least one fluorinated polymer; a layer C2 comprising at least one functionalized fluorinated polymer, optionally mixed with at least one fluorinated polymer; a barrier layer C3 comprising a barrier polymer selected among EVOH or a mixture based on EVOH, PGA or PDMK; a layer C4 of an adhering binder; a layer C5 comprising at least one polyolefin, optionally mixed with at least one functionalized polyolefin; optionally a barrier layer C6; optionally a layer C7 comprising at least one polyolefin, optionally mixed with at least one functionalized polyolefin.

Abstract: The invention relates to a coating composition comprising a radiation grafted functionalized fluoropolymer. This coating is preferably, in the form of a powder coating. The coating can be used on inorganic substrates, especially un-primed metals. The invention also relates to the coated inorganic substrate and to the use of the coating composition to protect the inorganic substrate, especially from corrosion.

Abstract: The invention relates to a multilayer tube comprising (from the inside to the outside of the tube): an optional layer (C1) consisting of at least one fluorinated polymer; a layer (C2) consisting of at least one radiation-grafted fluorinated polymer which is optionally mixed with at least one fluorinated polymer; an optional layer (C3) of adhesive binder; a layer (C4) consisting of at least one polyolefin or a mixture of at least one polyolefin with at least one functionalised polyolefin; a barrier layer (C5) consisting of a metal shield or comprising EVOH or a mixture based on EVOH, a PVDF or a PGA; and an optional layer (C6) consisting of at least one polyolefin.

Abstract: Described is a process for making closed cell fluoropolymer foam, and the foam so made. The process includes subjecting a fluoropolymer resin an inert gas at a pressure higher than atmospheric to drive gas into the resin, raising the temperature of the resin to or above its softening point, and reducing the pressure while maintaining the temperature at or above the softening point of the resin, in order to expand the resin to result in closed cell fluoropolymer foam. The resin is cross-linked prior to expansion. The resulting foams can be used in various applications, such as in flotation devices and for making thermal and/or acoustic insulation.

Abstract: The present invention relates to a process for grafting an unsaturated monomer onto a fluoropolymer, having the steps of: a) melt blending the fluoropolymer with the unsaturated monomer; b) forming the blend obtained in a) into films, sheets, granules or powder; c) exposing the products from step b), in the absence of air, to photon (?) or electron (?) irradiation with a dose of between 1 and 15 Mrad; and d) optionally treating the product obtained at c) in order to remove all or part of the unsaturated monomer that has not been grafted onto the fluoropolymer. Structures made with these materials are barriers to many fluids and in particular to petrol and to air-conditioning fluids and may be formed into bottles, tanks, containers, pipes, hoses and vessels of all sorts. They may also be converted into films with which packaging is made.

Abstract: Described is a process for making closed cell fluoropolymer foam, and the foam so made. The process includes subjecting a fluoropolymer resin an inert gas at a pressure higher than atmospheric to drive gas into the resin, raising the temperature of the resin to or above its softening point, and reducing the pressure while maintaining the temperature at or above the softening point of the resin, in order to expand the resin to result in closed cell fluoropolymer foam. The resin is cross-linked prior to expansion. The resulting foams can be used in various applications, such as in flotation devices and for making thermal and/or acoustic insulation.