Patent ID: 9631062
Date: 2017-04-25
CPC Classifications: C08G,C08K,C08L,H01L

Claim:
1. A curable composition to be cured to a silicone gel comprising: (A) an organopolysiloxane shown by the following general formula (1), having one or more alkenyl groups bound to a silicon atom in one molecule, wherein the amount is 100 parts by mass, wherein “R” independently represents an alkenyl group, “R 1 ” independently represents a substituted or unsubstituted monovalent hydrocarbon group which does not contain an aliphatic unsaturated bond, “a” is a positive number of 0.0001 to 0.2, “b” is a positive number of 1.7 to 2.2, and a+b is 1.9 to 2.4; (B) an organohydrogenpolysiloxane shown by the following general formula (2), having two or more hydrogen atoms bound to a silicon atom in one molecule, wherein the amount is such that 0.6 to 3 hydrogen atoms bound to a silicon atom is contained relative to one alkenyl group bound to a silicon atom in the component (A), wherein “R 2 ” independently represents a substituted or unsubstituted monovalent hydrocarbon group which does not contain an aliphatic unsaturated bond, “c” is a positive number of 0.7 to 2.2, “d” is a positive number of 0.001 to 1, and c+d is 0.8 to 3; (C) a platinum-based catalyst, wherein the amount is an effective amount; and (D) a carbon nanotube, wherein the amount is 0.01 to 3 parts by mass, wherein the penetration number defined by JIS K 2220 (¼ cone), when the silicone gel composition is cured, is 10 to 200, and the change of the penetration number of the silicone gel cured product after heating at 230° C. for 1,000 hours relative to the penetration number of the silicone gel cured product before the heating is −70% or higher.