Patent ID: 8309652
Filing Date: 2012-11-13
Classification: C08K,C08L,C09D

Abstract:
1. A curable silicone composition comprising: (A) an organopolysiloxane that is represented by the average unit formula: wherein R 1 , R 2 , and R 3 are each independently selected from substituted or unsubstituted monovalent hydrocarbon groups and epoxy-functional monovalent organic groups, with the proviso that at least 20 mole % of R 3 are aryl groups, and a, b, c, and d are numbers that satisfy 0≦a≦0.8, 0≦b≦0.8, 0.2≦c≦0.9, 0≦d<0.8, and a+b+c+d=1, and that has at least two of the aforementioned epoxy-functional monovalent organic groups in each molecule; (B) a compound that has a group capable of reacting with the epoxy group; (C) a cure accelerator; and (D) a thermally conductive filler selected from the group of metal powder, powder afforded by the vapor deposition or plating of a metal, and combinations thereof; wherein component (A) has an epoxy equivalent weight of from 100 to 1,000; and wherein component (B) is an organosiloxane represented by the general formula: wherein each R 4 is independently selected from substituted or unsubstituted monovalent hydrocarbon groups and phenolic hydroxyl-functional monovalent organic groups, with the proviso that at least two of the groups R 4 in the molecule are said phenolic hydroxyl-functional monovalent organic groups, and m is an integer from 0 to 1,000.