Patent ID: 8293372
Filing Date: 2012-10-23
Classification: C08K,C08L,Y10T

Abstract:
1. 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 consisting of the composition comprising, by weight, the total being 100%: 50 to 100% of at least one polyamide A1 of formula X.Y/Z or 6Y2/Z in which: “6” denotes the residues of hexamethylene diamine, 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 alpha,omega-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, a PA 6 layer or a layer of a PA-6/polyolefin blend having a PA-6 matrix: and optionally containing a conductor an EVOH layer, and a PA6 layer or a layer of a PA6/polyolefin blend having a PA-6 matrix.