Stabilized copolyetherester compositions

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 ##STR11## and said short chain ester units being represented by the formula ##STR12## 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 2.0-4.3; 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; said short chain ester units amount to about 15-95% by weight of said copolyetherester and effective concentrations of a phenolic antioxidant and copolymerized hindered amine photostabilizer units having the formula ##STR13## wherein A is ethylene and/or propylene, X is a divalent hydrocarbon radical of 2 to 18 carbon atoms and (n + m) equals 5 to 40, said photostabilizer units being connected to ester units in the copolyetherester through ester linkages.