摘要:
The present invention relates to a multilayer hose for compressed air comprising, in this order:an outer layer (1) made of polyamide,optionally an intermediate layer (2) of a polymer having a flexural modulus of less than 500 MPa,an inner layer (3) of a polymer having a flexural modulus of greater than 1100 MPa, the inner layer (3) being in contact with the compressed air.
摘要:
The present invention relates to a multilayer hose for compressed air comprising, in this order: an outer layer (1) made of polyamide, optionally an intermediate layer (2) of a polymer having a flexural modulus of less than 500 MPa, an inner layer (3) of a polymer having a flexural modulus of greater than 1100 MPa, the inner layer (3) being in contact with the compressed air.
摘要:
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 being hydrogenated (they are then denoted by S-EB-S).
摘要:
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 α,ω-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.
摘要:
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 A1 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 α,ω-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.
摘要:
The invention relates to a multilayer structure in which the inner layer is in contact with petrol or diesel fuel and comprising, in succession from the outside inwards: an outer layer made of, 50 to 100% of at least one polyamide A1 of formula X.Y/Z or 6.Y2/Z in which: “6” represents the residues of hexamethylene diamine, X denotes the residues of a C6-10 aliphatic, Y denotes the residues of an aliphatic C10-14 dicarboxylic acid, Y2 denotes the residues of an aliphatic C15-20 dicarboxylic acid, and Z denotes at least one unit chosen from the residues of a lactam, the residues of an α,ω-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%, an inner PA-6 layer or a layer of a PA-6/polyolefin blend having a PA-6 matrix and optionally containing a conductor.
摘要:
The invention relates to a multilayer structure in which the inner layer is in contact with petrol or diesel fuel and comprising, in succession from the outside inwards: an outer layer made of, 50 to 100% of at least one polyamide A1 of formula X.Y/Z or 6.Y2/Z in which: “6” represents the residues of hexamethylene diamine, X denotes the residues of a C6-10 aliphatic, Y denotes the residues of an aliphatic C10-14 dicarboxylic acid, Y2 denotes the residues of an aliphatic C15-20 dicarboxylic acid, and Z denotes at least one unit chosen from the residues of a lactam, the residues of an α,ω-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%, an inner PA-6 layer or a layer of a PA-6/polyolefin blend having a PA-6 matrix and optionally containing a conductor.
摘要:
The present invention relates to amorphous transparent copolyamides of formula: PACM.T/D.X/X1.Y1 resulting from the condensation of PACM, terephtalic acid, a diamine D, a diacid X, a diamine X1 and a diacid Y1 in which: PACM denotes the p-bis(aminocyclohexyl)methane, T denotes terephtalic acid, D denotes a diamine chosen from aromatic, arylaliphatic and cycloaliphatic diamines, X denotes a diacid HOOC—(CH2)n—COOH having from 8 to 20 carbon atoms, X1 denotes an aliphatic diamine, Y1 denotes a diacid HOOC—(CH2)n—COOH having from 6 to 20 carbon atoms, the mol proportion of PACM.T is such as (PACM.T)/(PACM.T+D.X) is above 0.5, and can be increased to 1, the mol proportion of X1 is between 16% and 38%, X1.Y1 can be replaced partly or totally by Z, a lactam or an alpha-omega aminocarboxylic acid, having from 9 to 20 carbon atoms, and in this case the mol proportion of Z is between 33% and 75%.
摘要:
The invention relates to a multilayer structure comprising at least two layers; a layer, referred to as the inner layer, intended to be in contact with a fluid, comprising a composition comprising at least one polymer and not comprising any copper, and a layer, referred to as the outer layer, intended to be in contact with the air, comprising a composition containing at least one polymer and at least one copper-based stabilizer. The invention also relates to a pipe comprising such a multilayer structure, and also to its use for transporting or storing fluids.
摘要:
The invention relates to a polyamide-based thermoplastic composition comprising, by weight: 50 to 98 parts of a polyamide (A1) nondiamine; 0.2 to 40 parts, preferably 0.2 to 9 parts, of a polyamide (A2) diamine, said polyamide (A2) being different from the polyamide (A1) and the ratio by mass (A2)/(A1) being less than 1; 1 to 60 parts, preferably 1 to 30 parts, of a reactive impact modifier (B) or of a blend of modifiers comprising at least one reactive impact modifier (B) or of a blend (B′) comprising at least one impact modifier and at least one reactive modifier. It also relates to an impact modifier composition and to the process for the preparation of a thermoplastic composition according to the invention using such an impact modifier composition.