Polyamide-based multilayer tube for transferring fluids

Details Polyamide-based multilayer tube for transferring fluids Polyamide-based multilayer tube for transferring fluids

2006-04-28

2010-12-28

Ruthkosky, Mark (Department: 1782)

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

C138S137000, C138S141000

Reexamination Certificate

active

07858165

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 α,Ω-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%, and0 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 present;the layers being successive and adhering to one another, the inner layer being the layer in contact with the fluid transported.

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