Patent ID: 7345125

Claim:
A silicone resin composition comprising: A) a silicone resin mainly containing a polyorganosilsesquioxane having a cage-type structure in a structural unit, the polyorganosilsesquioxane being represented by a general formula (1), [RSiO 3/2 ] n (1) wherein R represents an organic functional group having a (meth)acryloyl group and n represents 8, 10, or 12; B) an oligomer that is radically copolymerizable with the silicone resin, the oligomer containing at least one unsaturated group represented by one of —R 3 —CR 4 ═CH 2 and —CR 4 ═CH 2 in a molecule wherein R 3 represents an alkylene group, an alkylidene group, or a —OCO— group, and R 4 represents hydrogen or an alkyl group, the oligomer having a number average molecular weight of 2,500 or more, and the oligomer having a urethane bond, and C) an unsaturated compound that (i) is radically copolymerizable with the silicone resin, and (ii) comprises an alicyclic unsaturated compound 10 to 100 wt % of which is represented by the following general formula (2), wherein Z represents any group represented by the formula ( 2 a ) or ( 2 b ), and R represents hydrogen or a methyl group, and wherein the silicone resin (A), the oligomer (B), and the unsaturated compound (C) are compounded at a weight ratio of 5 to 80:1 to 50:0 to 80.