Patent ID: 8044162
Filing Date: 2011-10-25
Classification: C08K,C08L,C09J,H01L

Abstract:
1. A curable organopolysiloxane composition comprising at least the following components: 100 parts by weight of an organopolysiloxane (A) of the following average formula: (where R 2 is an optionally substituted univalent hydrocarbon group with 1 to 10 carbon atoms; however, in one molecule, at least two R 2 's are univalent hydrocarbon groups having unsaturated aliphatic bonds; at least 20 mole % of all R 2 's are aryl groups; and “b” is a number that satisfies the following condition: 0.5≦b≦2.2); an organohydrogenpolysiloxane (B) of the following average formula: (where R 3 is an optionally substituted univalent hydrocarbon group having 1 to 10 carbon atoms and free of unsaturated aliphatic bonds, and where “c” and “d” are numbers that satisfy the following conditions: 1.0<c<2.2; 0.002<d<1; and 1.0<c+d<3.0) wherein component (B) is contained in such an amount that the mole ratio of silicon-bonded hydrogen atoms contained in this component to univalent hydrocarbon groups with unsaturated aliphatic bonds contained in component (A) is in the range of 0.3 to 5; 0.01 to 50 parts by weight of an adhesion-promoting agent (C) represented by the following average formula: (where R 1 is a group selected from an optionally substituted alkyl group with 1 to 10 carbon atoms, an alkenyl group with 2 to 20 carbon atoms, an aryl group with 6 to 20 carbon atoms, an alkoxy group with 1 to 10 carbon atoms, or an epoxy-containing organic group; however, in one molecule, the content of alkenyl groups constitute at least 5 mole % of all groups designated by R 1 ; the content of aryl groups constitute at least 5 mole % of all groups designated by R 1 ; the content of alkoxy groups constitute at least 5 mole % of all groups designated by R 1 ; the content of epoxy-containing organic groups constitute at least 5 mole % of all groups designated by R 1 ; and “a” is a number that satisfies the following condition: 2.2≦a<2.6); and a hydrosilylation catalyst (D) in a catalytic quantity.