Patent ID: 8889811

Claim:
A curable composition, comprising: (A) an organopolysiloxane having an average composition formula of Formula 1; and (B) an organopolysiloxane comprising a hydrogen atom binding to a silicon atom: (R 1 R 2 2 SiO 1/2 ) a (R 3 R 4 SiO 2/2 ) b (R 5 SiO 3/2 ) c (SiO 2 ) d [Formula 1] where R 1 is an epoxy group or a monovalent hydrocarbon group having at least two carbon atoms, R 2 is an epoxy group or an alkyl group having 1 to 4 carbon atoms, R 3 and R 4 are each independently an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an epoxy group or an aryl group having 6 to 25 carbon atoms, R 5 is an alkyl group having 1 to 20 carbon atoms, an epoxy group or an aryl group having 6 to 25 carbon atoms, with the proviso that at least one of R 1 , R 3 and R 4 is an alkenyl group and at least one of R 1 to R 5 is an epoxy group; and a is a positive number, b is a positive number, c is a positive number, d is 0 or a positive number, b/a is 5 or more, and b/c is 5 or more.