Heat-sealing thermoplastic adhesive

Claim 1

A heat-sealing thermoplastic adhesive of a thermoplastic polymer which is resistant to washing and dry-cleaning, selected from the group consisting of (a) copolyamides containing about 80 to 20% by weight of lauric lactam and 20 to 80% by weight of at least one other polyamide forming material; (b) copolyamides containing 25 to 35% by weight of caprolactam; 20 to 40% by weight of lauric lactam; 8 to 25% by weight of hexamethylene diamine adipate and from 10 to 40% by weight of the hexamethylene diamine salt of the acid of formula I, HOOC--(CH 2 ) n --COOH in which n = 7, 8, 10 or 11; (c) copolyamides containing 30% by weight of caprolactam; 30 to 35% by weight of lauric lactam and 10 to 15% by weight of hexamethylene diamine adipate; (d) a copolyamides containing 30% by weight of caprolactam; 30 to 35% by weight of lauric lactam; and 15 to 35% by weight of the hexamethylene diamine salt of the acid of formula I; (e) copolyamides of a polyamide-forming amide salt containing at least 10 carbon atoms, a polyamide forming w-amino acid and, optionally, a polyamide forming lactam; (f) copolyamides of a polyamide-forming amide salt containing at least 10 carbon atoms and a polyamide-forming lactam and crystallisable copolyesters based on terephthalic acid/diol; which contains from about 0.05 to about 5% by weight, based on the weight of said polymer, of at least one hydrophobic organosilicon polymer selected from the group consisting of polyorganosiloxanes, silicones, polysilalkylenes, polysilarylenes, polyorganosilazanes and polyorganooxysiloxanes.