Condensation polymer containing the residue of an acyloxystyrl compound and shaped articles produced therefrom

A composition comprising molding or fiber-grade polyester polymer (a) containing an ultra violet light stabilizing amount of a mono-4-acyloxystyryl or bis-4-acyloxystyryl compound or (b) having reacted therewith or copolymerized therein an ultra violet light stabilizing amount of a styryl residue derived from a mono-4-acyloxystyryl or bis-4-acyloxystyryl compound, having the formula:

• ##STR35## wherein each R.sup.1 is independently selected from cyano, carboxy, alkenyloxycarbonyl, or a substituted or unsubstituted alkoxycarbonyl, cycloalkoxoycarbonyl or aryloxycarbonyl radical;
• each R.sup.2 is independently selected from one of the groups specified for R.sup.1 or an unsubstituted or substituted carbamoyl, alkanoyl, cycloalkanoyl, aroyl, alkylsulfonyl, cycloalkylsulfonyl, arylsulfonyl or aromatic, carbocyclic or heterocyclic radical;
• each R.sup.3 is independently selected from hydrogen or an unsubstituted or substituted alkyl, cycloalkyl or aryl radical;
• A.sup.1 and A.sup.2 are independently selected from 1,4-phenylene radicals;
• and
• R.sup.4 is an unsubstituted or substituted organic acyl radical selected from the group consisting of ##STR36## wherein R.sup.6 is hydrogen, alkenyl or an unsubstituted or substituted alkyl, cycloalkyl or carbocyclic or heterocyclic aryl radical;
• R.sup.7 is hydrogen or an unsubstituted or substituted alkyl radical;
• R.sup.8 is an unsubstituted or substituted alkyl, cycloalkyl or aryl radical;
• and
• R.sup.5 is carbonyl, dicarbonyl or a diacyl radical residue selected from the group consisting of ##STR37## wherein R.sup.7 is hydrogen or an unsubstituted or substituted alkyl radical and R.sup.9 is a divalent organic linking group.