Thermoplastic copolyester elastomers modified with salts of phenolic compounds

Abstract

A thermoplastic copolyester elastomer composition comprising a copolyester consisting essentially of a multiplicity of long-chain ester units and short-chain ester units joined through ester linkages, said long-chain ester units being represented by the formula (Ia), formula (Ib) and combinations thereof ##STR1## and said short-chain ester units being represented by formula (II) ##STR2## where G is a divalent radical remaining after the removal of hydroxyl groups from at least one long-chain glycol having a melting point of less than about 55.degree. C. and a number average molecular weight of about 400-4000, R is a divalent radical remaining after the removal of carboxyl groups from at least one dicarboxylic acid having a molecular weight less than about 300, R' is a divalent radical remaining after the removal of carboxyl groups from dimer acid, D is a divalent radical remaining after the removal of hydroxyl groups from at least one aliphatic diol having a molecular weight less than about 250, with the proviso that at least about 70 mole percent of the D radicals are either ethylene radicals or 1,4-butylene radicals and at least about 70 mole percent of the R radicals are 1,4-phenylene radicals, said short-chain ester units being present in an amount of about 15-95 percent by weight of said copolyester; and about 0.1-10 percent by weight, based on the weight of the total composition, of at least one alkali metal salt of a phenolic compound having a pK.sub.a 25.degree. greater than 5 and an equivalent weight of less than about 300 per phenolic hydroxyl group.

Dependencies are inferred from the claim text.