Stabilized copolyetheresters

Claim 1

A copolyetherester composition stabilized against oxidative degradation due to exposure to heat and light, said composition consisting essentially of a copolyetherester 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 ester units being represented by the formula ##STR9## and said short chain ester units being represented by the formula ##STR10## where G is a divalent radical remaining after the removal of terminal hydroxyl groups from a poly(alkylene oxide)glycol having a number average molecular weight of about 400-6000 and a carbon to oxygen atomic ratio of about 2.5-4.3; R is a divalent radical remaining after removal of carboxyl groups from an aromatic dicarboxylic acid having a molecular weight less than about 300, and D is a divalent radical remaining after removal of hydroxyl groups from a diol having a molecular weight less than about 250; provided said short chain ester units amount to about 15-95 percent by weight of said copolyetherester and effective concentrations of a phenolic antioxidant and a hindered amine photostabilizer of the formula ##STR11## where R 1 represents hydrogen or an alkyl radical of 1-12 carbon atoms and R 2 and R 3 represent an alkyl radical of 1-12 carbon atoms, benzyl, or 3,5-di-tert-butyl-4-hydroxybenzyl with the proviso that at least one of R 2 and R 3 is 3,5-di-tert-butyl-4-hydroxybenzyl.