Patent ID: 7132220

Claim:
An organosiloxane polymer obtained by addition reaction of an organohydrogenpolysiloxane of the average compositional formula (1), an alkenyl-containing organopolysiloxane of the average compositional formula (2) and an unsaturated compound of the general formula (3) or (4), R 1 a H b SiO (4−a−b)/2 (1) wherein a and b are positive numbers satisfying 0≦a<3, 0<b≦3, and 0<a+b≦3, and R 1 is independently an organic radical selected from aliphatic unsaturation-free, substituted or unsubstituted, monovalent hydrocarbon radicals having 1 to 30 carbon atoms, R 3 c R 4 d SiO (4−c−d)/2 (2) wherein c and d are positive numbers satisfying 0≦c<3, 0<d≦3 and 0<c+d≦3, R 3 is independently an organic radical selected from aliphatic unsaturation-free, substituted or unsubstituted, monovalent hydrocarbon radicals having 1 to 30 carbon atoms, and R4 is an alkenyl radical, wherein in formula (4) is