Method for stabilization of UV sensitive plastics with substitut

Details Method for stabilization of UV sensitive plastics with substitut Method for stabilization of UV sensitive plastics with substitut

1977-12-02

1978-08-01

Czaja, Donald E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 458NT, 260307FA, C08K 535

Patent

active

041042549

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 formula ##STR1## WHEREIN R.sub.a, R.sub.b, R.sub.d, and R.sub.e are independently selected from the group consisting of hydrogen, alkyl of 1 to 6 carbon atoms, cycloalkyl, and aryl; and R.sub.c is hydrogen or hydroxyalkyl.

REFERENCES:
patent: 2817663 (1957-12-01), Conlon et al.
patent: 2966472 (1960-12-01), Fiel
patent: 3049509 (1962-08-01), Hardy et al.
patent: 3380959 (1968-04-01), Frump
patent: 3770693 (1973-11-01), Metzger
patent: 4012261 (1977-03-01), Sidi et al.

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