Patent ID: 6248803
Filing Date: 2001-06-19
Classification: C08F,C09D

Abstract:
A radiation-curable resin composition comprising (A) an organopolysiloxane having acrylic functionality and (B) a photopolymerization initiator, said composition curing upon exposure to radiation into a product having a gel fraction of at least 85% by weight,said organopolysiloxane (A) being obtained by effecting equilibration reaction of an organopolysiloxane dimer represented by the following average compositional formula:H.sub.2 C.dbd.C(R.sup.1)C(O)O(CH.sub.2).sub.m Si(R.sup.2).sub.2 OSi(R.sup.2).sub.2 (CH.sub.2).sub.m OC(O)C(R.sup.1).dbd.CH.sub.2wherein R.sup.1 is hydrogen or a monovalent hydrocarbon group having 1 to 6 carbon atoms, R.sup.2 is independently hydrogen or a monovalent hydrocarbon group having 1 to 10 carbon atoms, and m is an integer of 1 to 5with hexamethylcyclotrisiloxane or octamethylcyclotetrasiloxane or a mixture thereof and at least one cyclic organopolysiloxane selected from the group consisting of 1,1-diphenyl-3,3,5,5-tetramethylcyclotrisiloxane, 1-phenyl-1,3,3,5,5-pentamethylcyclotrisiloxane, and hexaphenylcyclotrisiloxane.