Ultraviolet light absorbing compounds and silicone compositions

A composition curable into a cross-linked polymer composition comprising a cross-linkable siloxane polymer, a cross-linking component capable of reacting with said cross-linkable siloxane polymer, and at least one component capable of reacting with at least one of said cross-linkable siloxane polymer and said cross-linking component in an amount effective to render said cross-linked polymer composition ultraviolet light absorbing, said component having the following structure ##STR11## and mixtures thereof, wherein X is selected from the group consisting of H, alkoxy radicals and halogen, R.sup.1 is selected from the group consisting of H and alkyl radicals, provided that at least one of X and R.sup.1 is other than H, R.sup.2 is selected from the group consisting of divalent hydrocarbon radicals, divalent substituted hydrocarbon radicals, oxo, divalent oxyhydrocarbon radicals and divalent substituted oxyhydrocarbon radicals, each R.sup.3 is independently selected from the group consisting of alkyl radicals, substituted alkyl radicals, alkoxy radicals, substituted alkoxy radicals, aryl radicals, substituted aryl radicals and fluoro radical, R is selected from the group consisting of H and CH=CH.sub.2, and c is an integer in the range of 1 to about 20.

A compound having the following formula ##STR12## wherein X is selected from the group consisting of H, alkoxy radicals and halogen, R.sup.1 is selected from the group consisting of H and alkyl radicals, provided that at least one of X and R.sup.1 is other than H, R.sup.2 is selected from the group consisting of divalent hydrocarbon radicals, divalent substituted hydrocarbon radicals, oxo, divalent oxyhydrocarbon radicals and divalent substituted oxyhydrocarbon radicals, each R.sup.3 is independently selected from the group consisting of alkyl radicals, substituted alkyl radicals, alkoxy radicals, substituted alkoxy radicals, aryl radicals and substituted aryl radicals, R is selected from the group consisting of H and CH=CH.sub.2, and c is an integer in the range of 1 to about 20.

A compound or mixture of compounds selected from the group consisting of2-[3'-t-butyl-2'-hydroxy-5'-(2"(7'"-vinyl octamethyl tetrasiloxane) ethyl) phenyl]-5-chloro-2H-benzotriazole, 2-[3'-t-butyl-2'hydroxy-5'octamethyl tetrasiloxane) ethyl) phenyl]5-chloro-2H-benzotriazole and mixtures thereof.

A compound having the following formula ##STR14## wherein X is selected from the group consisting of H, alkoxy radicals and halogen, R.sup.1 is selected from the group consisting of alkyl radicals, R.sup.2 is selected from the group consisting of divalent hydrocarbon radicals, divalent substituted hydrocarbon radicals, oxo, divalent oxyhydrocarbon radicals and divalent substituted oxyhydrocarbon radicals, each R.sup.3 is independently selected from the group consisting of alkyl radicals, substituted alkyl radicals, alkoxy radicals, substituted alkoxy radicals, aryl radicals and substituted aryl radicals, R is selected from the group consisting of R.sup.3, H and CH=CH.sub.2, and c is an integer in the range of 1 to about 20.

A compound having the following formula ##STR15## wherein X is selected from the group consisting of H, alkoxy radicals and halogen, R.sup.1 is selected from the group consisting of H and alkyl radicals, provided that at least one of X and R.sup.1 is other than H, R.sup.2 is selected from the group consisting of methylene, substituted emthylene, ethylene, substituted ethylene, oxo, divalent oxyhydrocarbon radicals and divalent substituted oxyhydrocarbon radicals, each R.sup.3 is independently selected from the group consisting of alkyl radicals, substituted alkyl radicals, alkoxy radicals, substituted alkoxy radicals, aryl radicals and substituted aryl radicals, R is selected from the group consisting of R.sup.3, H and CH=CH.sub.2, and c is an integer in the range of 1 to about 20.