Abstract: The present invention relates to a multilayer tube comprising, in its radial direction from the outside inwards: an optional layer (1) made of nylon-11 or nylon-12 polyamide; an intermediate layer (2) comprising by weight, the total being 100%: 50 to 100% of at least one polyamide A1 of formula X,Y/Z or 6,Y2/Z, in which X denotes residues of an aliphatic diamine having from 6 to 10 carbon atoms, Y denotes residues of an aliphatic dicarboxylic acid having from 10 to 14 carbon atoms, Y2 denotes residues of an aliphatic dicarboxylic acid having from 15 to 20 carbon atoms, Z denotes at least one unit chosen from residues of a lactam, residues of an ?,?-aminocarboxylic acid, the unit X1,Y1, in which X1 denotes residues of a diamine and Y1 denotes residues of a diacid, the weight ratios Z/(X+Y+Z) and Z/(6+Y2+Z) being between 0 and 15%, and 0 to 50% of nylon-11 or nylon-12 polyamide; an optional layer (3) made of nylon-11 or nylon-12 polyamide, with the condition that at least one of the layers (1) and (3) is presen

Abstract: The invention relates to a composition, and structures having a layer made of said composition, in which the composition is, by weight, the total being 100%: 50 to 100% of at least one polyamide Al of formula X.Y/Z or 6.Y2/Z in which: X denotes the residues of an aliphatic diamine having from 6 to 10 carbon atoms, Y denotes the residues of an aliphatic dicarboxylic acid having from 10 to 14 carbon atoms, Y2 denotes the residues of an aliphatic dicarboxylic acid having from 15 to 20 carbon atoms and Z denotes at least one unit chosen from the residues of a lactam, the residues of an ?,?-aminocarboxylic acid, the unit X1, Y1 in which X1 denotes the residues of an aliphatic diamine and Y1 denotes the residues of an aliphatic dicarboxylic acid, the weight ratios Z/(X+Y+Z) and Z/(6+Y2+Z) being between 0 and 15%; 0 to 40% of a plasticizer; 0 to 50% of an impact modifier; and 0 to 50% of a polyamide A2.

Abstract: The present invention relates to a multilayer structure comprising the following successive layers: a polyamide or HDPE (high-density polyethylene) layer; a tie layer; an impact-modified EVOH layer; optionally, a tie layer; and a polyamide or polyamide/polyolefin blend or polyolefin layer, the latter layer possibly containing fillers in order to make it antistatic; and such that the impact-modified EVOH layer is a blend based on EVOH and at least one modifier chosen from: a) functionalized ethylene/alkyl (meth)acrylate copolymers; b) products resulting from the reaction of (i) a copolymer of ethylene and of an unsaturated monomer X grafted or copolymerized with (ii) a polyamide; c) blends of a) and b); d) polyamides, preferably PA-6; e) blends of a) and d); f) elastomers, preferably EPR, EPDM and NBR, these elastomers possibly being functionalized; g) S-B-M triblocks; h) triblocks formed from a poly(butyl acrylate) block between two PMMA blocks; and i) linear or star S-B-S block copolymers, these optionally b

Abstract: The present invention relates to a coated metal surface comprising, successively: a layer (1) of epoxy primer placed next to the metal, a layer (2) of binder comprising 98 to 50 parts by weight of at least one fluoropolymer L3 per 2 to 50 parts, respectively, of at least one polymer chosen from acrylic polymers L1 and polymers L2 which are fluoropolymers chemically modified by a partial dehydrofluorination followed by an oxidation, a layer (3) of fluoropolymer. According to a first variant, the coating does not comprise the layer (3). However, it is recommended that the layer (2) which becomes the outer layer should be thicker than in the structure of the main invention. According to a second variant, the coating does not comprise the layer of primer (1), the layer of binder necessarily contains the polymer L2 and the surface is necessarily the outer surface of tubes.

Abstract: A metal surface is coated with a coating comprising, in succession starting from the metal:

Abstract: The present invention relates to a coated metal surface comprising, successively: