| abstract |
Method for extending the useful life of polymers which are sensitive to photodegradation by ultraviolet light. In this method, the resistance of UV sensitive polymers is enhanced by the incorporation therein of an ultraviolet light stabilizer effective amount of at least one compound of the formulan wherein R., R b , R d , and R. are independently selected from the group consisting of hydrogen, alkyl of 1 to 6 carbon atoms, cycloaktyl, and aryl; and R c is hydrogen or hydroxyalkyl. |