Patent ID: 8969478
Filing Date: 2015-03-03
Classification: C08G,C08K,C08L,H01L

Abstract:
1. A curable composition, comprising: (A) an organopolysiloxane having an average composition formula of Formula 1; and (B) a crosslinked organopolysiloxane comprising an alkenyl group and an epoxy group: wherein R wherein the organopolysiloxane (B) has an average composition formula of Formula 9: wherein R's are each independently a monovalent hydrocarbon group or an epoxy group, with the proviso that at least one of R's is an alkenyl group, at least one of R's is an aryl group and at least one of R's is an epoxy group; 1 is a positive number, m is 0 or a positive number, r is a positive number, s is 0 or a positive number, (l+m)/(l+m+r+s) is 0.2 to 0.7, m/(m+r+s) is 0.3 or less, and r/(r+s) is 0.8 or more, and wherein a molar ratio (Ep/Si) of epoxy groups (Ep) in the organopolysiloxane (B) with respect to silicon atoms in the organopolysiloxane (B) is 0.15 or less.