Light stabilized polymer compositions

Claim 1

A composition of matter stabilized against oxidative and ultraviolet light deterioration which comprises a. a synthetic organic polymer normally subject to ultraviolet and oxidative deterioration, b. from 0.001 to 5% by weight based on the weight of polymer of a nickel 3,5-di-t-alkyl-4-hydroxybenzoate having up to 8 carbon atoms in the t-alkyl group, c. from 0.001 to 5% by weight based on the weight of polymer of an ultraviolet light absorber selected from (1) 2-hydroxy-4-n-octoxybenzophenone, or (2) a benzotriazole selected from 2-(2'-hydroxy-3',5'-di-t-butylphenyl)-5-chlorobenzotriazole, 2-(2'-hydroxy-3,5-di-t-amylphenyl) benzotriazole or 2-(3'-t-butyl-2'-hydroxy-5'-methylphenyl)-5-chlorobenzotriazole, d. from 0 to 5% by weight based on the weight of a polymer of a phenolic antioxidant selected from n-octadecyl 3',5'-di-t-butyl-4'-hydroxyphenyl) propionate, tetrakis-{methylene 3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate}methane, di-n-octadecyl 3,5-di-t-butyl-4-hydroxybenzylphosphonate, tris(3,5-di-t-butyl-4-hydroxybenzyl)isocyanurate, di-octadecyl-2-(3-t-bitu;-5-methyl-4-hydroxybenzyl)malonate, and 1,3,5-tris-(3,5-di-t-butyl-4-hydroxybenzyl)5-triazine-2,4,6-(IH,3H)-trione e. from 0 to 5% by weight based on the weight of polymer of an organosulfur compound selected from dilaurylthiodiproprionate and distearylthiodynapionate, provided that said composition is synergistic in its activity.