Patent ID: 8173759

Claim:
An organopolysilmethylene-siloxane represented by the following general formula (1): wherein R 1 is, independently of each other, a group selected from the group consisting of an unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a hydroxy group, R 3 SiCH 2 — and R 3 SiO—, wherein R is, independently of each other, a group selected from the group consisting of an unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms and a hydroxy group, m is an integer of 1 to 100, and n is an integer of 1 to 100, and wherein at least two out of R 1 's and R's are an alkenyl group.