Systems of polyols and ultraviolet radiation-curable epoxy silicones.

摘要

Ultraviolet radiation-curable coating compositions are described which comprise: (A) an epoxyfunctional diorganopolysiloxane having the general formula R2R min SiO(RR min SiO)xSiR2R min , where each R individually is an alkyl group having from 1 to 8 carbon atoms, each R min individually is R or a monovalent epoxyfunctional organic radical having from 2 to 20 carbon atoms with the proviso that at least 2 R min radicals are monovalent epoxyfunctional organic radicals and x has a value from 0 to 20; (B) a compound having at least one alcoholic or phenolic hydroxyl group in an amount providing not more than about 1.5 hydroxyl group per epoxy group of the diorganopolysiloxane; and (C) a catalytic amount of a photocatalyst or a combination of photocatalysts. d