Thermoplastic elastomer

Claim 1

Thermoplastic elastomer composition consisting essentially of: (a) segmented thermoplastic copolyester elastomer consisting essentially of a multiplicity of recurring long chain ester units and short chain ester units joined head to tail through ester linkages, said long chain units being represented by the formula ##STR10## and said short chain units being represented by the formula ##STR11## where G is a divalent radical remaining after the removal of the terminal hydroxyl groups from a difunctional polyether glycol having a number average molecular weight in the range from about 400 to about 6,000, R is a hydrocarbon radical remaining after removal of the carboxyl groups from terephthalic acid or isophthalic acid, and D is a divalent radical remaining after removal of hydroxyl groups from 1,4-butanediol or 1,4-butenediol; provided, said short chain units amount to between about 30% and about 85% by weight of the copolyester; (b) between about 0.1 and about 25% by weight of said polyester of polyvinylpyrrolidone having a K value not exceeding about 30; (c) between about 0.05 and about 5% by weight of said copolyester of cyanoguanidine or guanidine stabilizer of the formula ##STR12## where n is an integer between 2 and about 20; (d) between about 0.1 and about 5% by weight of said copolyester of diphenylamine derivative of the formula ##STR13## where R and R 1 are methyl or phenyl; and (e) between 0.05 and about 3% by weight of said copolyester of phosphorus compound of the formula ##STR14## where each of R and R 1 independently represents a hydrocarbon radical selected from the group consisting of alkyl, aryl and alkyl/aryl hydrocarbon radicals having from 1 to about 22 carbon atoms and R 3 represents hydrogen or a hydrocarbon radical selected from the group consisting of alkyl, aryl and alkyl/aryl hydrocarbon radicals having from 1 to about 22 carbon atoms.