Abstract: The present invention relates to a multilayer tube comprising, in its radial direction from the outside inwards: a polyamide outer layer (1); an inner layer (2) of a composition comprising, the total being 100%, 5 to 30% by weight of a blend (A) comprising: a polyethylene carrying epoxy functional groups, an impact modifier chosen from elastomers and very low-density polyethylenes, the said impact modifier being completely or partly functionalized; 95 to 70% by weight of a blend (B) comprising: a fluoropolymer (B1), a functionalized fluoropolymer (B2), the proportion of (B2) being between 1 and 80% by weight of (A)+(B), the layers being successive and adhering to one another in their respective contact region. The inner layer is the layer in contact with the fluid being transported. The layer (2) may be conductive. It is also possible to place a polyamide layer (3) beside the layer (2), which layer becomes the inner layer.

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 present invention relates to a masterbatch comprising by weight: from 1 to 50% of a blend of at least one fluoropolymer (A) and at least one interfacial agent (B); from 99 to 50% of a polyolefin (C); such that the two constituents (A) and (B) are intimately blended beforehand at a temperature such that at least one is in the melt state throughout its mass or on its surface, and are then blended with the polyolefin (C). The invention also relates to the use of the masterbatch as a processing aid for extruding a polyolefin (D), in particular for extruding a film-form polyolefin. The invention also relates to the process for obtaining the masterbatch.

Abstract: The present invention concerns a microcomposite powder comprising: flat graphite particles GLP having sides from 50 to 1000 ?m and a thickness from 5 to 50 ?m, consisting of agglomerates of more elementary graphite particles joined together and superimposed so that their principal planes are mutually parallel, said particles being covered with particles of a fluoropolymer from 0.1 to 0.5 ?m in size.

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: The invention relates to a formulation and a method for production of a material from an epoxy resin and a Theological control agent, which may be processed by means of the techniques for working thermoplastics yet with the capacity to react and form a thermosetting material with good shock-resistant properties.

Abstract: The invention relates to the use of a coextruded multilayer film for protecting a (lingo)cellulose material, wherein said multilayer film consists of the following arranged to each other layers: a surface layer (I) comprising PVDF and possibly PMMA in the form of the main components, an intermediate layer (II) comprising in the form of main components 0-60 PVDF parts, 40 to 100 PMMA parts, 0-25 acrylic elastomer parts, and 0-10 UV absorber parts, the totality thereof being equal to 100 parts, and an adhesive layer (III), which comprises a functional PMMA in the form of the main component and is arranged on the side of the (ligno)cellulose material.

Abstract: The invention relates to the use of a multilayer film for protecting a substrate which gives off volatile compounds which comprises: a surface layer comprising, by weight, from 70 to 100%, preferably from 90 to 100%, of a fluoropolymer and from 0 to 30%, preferably from 0 to 10% of an acrylic polymer; an adhesive layer comprising from 50 to 100% of an acrylic polymer, from 0 to 50% of a fluoropolymer, from 1 to 10% of a UV stabilizer and from 0 to 50% of an impact modifier, characterized in that the thickness of the surface layer is between 2 and 15 ?m, preferably between 2 and 10 ?m, more preferably still between 3 and 8 ?m, and the thickness of the adhesive layer is between 30 and 75 ?m, preferably between 30 and 60 ?m, more preferably still between 30 and 50 ?m. The invention also relates to a substrate protected by the multilayer film.

Abstract: The present invention relates to a thermoset material with improved impact resistance comprising, by weight: •99 to 20% of a thermoset resin, •1 to 80% of an impact modifier comprising at least one copolymer chosen from copolymers comprising A-B-C and A-B blocks, in which: each block is connected to the other by means of a covalent bond or of an intermediate molecule connected to one of the blocks via a covalent bond and to the other block via another covalent bond, A is a copolymer of methyl methacrylate and of at least one water-soluble monomer, C is either (i) a PMMA (homopolymer or copolymer) this PMMA comprising optionally a water-soluble monomer or (ii) a polymer based on vinyl monomers or mixture of vinyl monomers, B is incompatible or partially compatible with the thermoset resin and incompatible with the A block and the optional C block and its glass transition temperature Tg is less than the operating temperature of the thermoset material.

Abstract: This invention discloses a multilayer article prepared by rotational moulding that comprises: a) a layer A comprising a functionalised fluoropolymer; b) a layer B comprising a non-fluoropolymer containing functional groups; and c) optionally a layer C prepared from a polymer that is dissimilar from that of layer A and that is similar to or dissimilar from that of layer B and is adjacent to layer A and/or layer B and, if present, is characterised in that it has good adhesion to layer A Ond/or to layer B and is not a blend of layer A and layer B.

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: The present invention relates to a method for the radiation grafting of a compound that can be grafted onto a fluoropolymer, so as to prevent destabilization of the fluoropolymer, comprising the following steps: a) the fluoropolymer is melt-blended with a graftable compound; b) the blend obtained at a) is formed into films, sheets, granules or powder; c) the products from step b) are subjected to photon (?) or electron (?) irradiation with a dose of between 0.5 and 15 Mrad; and d) optionally, the products from step c) are subjected to a washing and/or a degassing operation, and in which a stabilizer is blended into the fluoropolymer. The stabilizer may be an antioxidant, a graftable metal salt or else a combination of the two. The invention also relates to structures comprising at least one layer of these blends and at least one layer of another material. The invention also relates to the use of these structures in order to obtain a barrier effect.

Abstract: The present invention relates to a formulation and to a process which make it possible to produce, using an epoxide resin and an agent for controlling the rheology, on the one hand, and reinforcing fibres, on the other hand, semi-finished products for composites in the form of jointly woven or knitted yarns which make it possible to prepare thermoset materials by simple heating.

Abstract: The present invention relates to a process which makes it possible to produce semifinished products, such as reactive textiles or films for composites, starting from two formulations, one based on epoxide resin and on a rheology-control agent and the other based on a hardener and on a rheology-control agent. These semifinished products are stable during storage but they can react together when the temperature is increased to form the desired thermoset material.

Abstract: The present invention relates to the use of films, formed from an adhesive layer and a layer (A), for coating articles made of a thermoset, the adhesive layer comprising, by weiqht: 0 to 60 parts of PVDE, 10 to 100 parts of functionalized PMMA, 0 to 50 parts of an acrylic elastomer and 0 to 4 parts of a UV absorber, the total making up 100 parts, the layer (A) comprising, as main constituents, 0 to 100 parts of PVDF per 100 to 0 parts of PMMA, respectively. This film may be manufactured by coextrusion and is then fixed to the thermoset, for example by hot pressing. The invention also relates to an SMC (Sheet Moulding Compound) multilayer structure comprising, in this order: a backing film, a crosslinkable composition (the precursor of the thermoset), the above adhesive layer and the above layer (A).

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: A multiplayer tube comprising: an outer layer formed from a polyamide, a layer formed from a copolyamide, a layer formed from an EVOH, a layer formed from a copolyamide, and an inner layer formed from a polyamide, the layers being successive and adhering to one another in their respective contact region. Advantageously, the inner layer is formed by a compound based on a polyamide and electrically conducting carbon black, producing a surface resistivity of less than 106 ?. The tubes have a very low permeability to petrol, particularly to hydrocarbons and their additives, and in particular to alcohols, such as methanol and ethanol, or to ethers, such as MTBE or ETBE. These tubes also have good resistance to engine lubricating oils as well as fuels.

Abstract: The present invention relates to a structure successively comprising: a layer of barrier polymer, a tie layer comprising, the total being 100%: 1 to 80% of at least one polyethylene carrying epoxy functional groups, 99 to 20% of at least one viscous polymer compatible with the polyethylene carrying epoxy functional groups, a polyethylene layer, and optionally another tie layer and a layer of barrier polymer, the layers adhering in their respective contact zones. This structure is of use in preparing devices for the storage or transfer of fluids, in particular in motor vehicles. The invention also relates to these devices. These devices can be pipes, tanks, bottles or containers in which the layer of barrier polymer is in contact with the stored or transported fluid. These structures can comprise other layers composed of other materials.

Abstract: The present invention relates to a masterbatch comprising by weight: from 1 to 50% of a blend of at least one fluoropolymer (A) and at least one interfacial agent (B); from 99 to 50% of a polyolefin (C); such that the two constituents (A) and (B) are intimately blended beforehand at a temperature such that at least one is in the melt state throughout its mass or on its surface, and are then blended with the polyolefin (C). The invention also relates to the use of the masterbatch as a processing aid for extruding a polyolefin (D), in particular for extruding a film-form polyolefin. The invention also relates to the process for obtaining the masterbatch.