Patent ID: 6512037
Filing Date: 2003-01-28
Classification: C08G,C08K,C08L,C09D

Abstract:
A silicone composition comprising:(A) an organopolysiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) an organohydrogenpolysiloxane containing an average of at least two silicon-bonded hydrogen atoms per molecule in a concentration sufficient to cure the composition; (C) an effective amount of a transition metal compound having a formula selected from: wherein each R1 is independently hydrocarbyl, â€”(R7O)qR8, â€”SiR92(OSiR92)rOSiR93, epoxy-substituted hydrocarbyl, acryloyloxy-substituted hydrocarbyl, methacryloyloxy-substituted hydrocarbyl, amino-substituted hydrocarbyl, or hydrocarbylamino-substituted hydrocarbyl, wherein R7 is hydrocarbylene, R8 is hydrocarbyl, R9 is hydrocarbyl, q is from 1 to 20, and r is from 0 to 20; each R2 is independently hydrocarbyl, halohydrocarbyl, cyanoalkyl, alkoxy, alkenyloxy, alkenyloxyalkyloxy, cyanoalkoxy, methacryloyloxyalkyloxy, acryloyloxyalkyloxy, amino, or hydrocarbyl-substituted amino; each R3 is independently hydrogen, hydrocarbyl, halohydrocarbyl, or acyl; each R4 is independently hydrocarbyl, halohydrocarbyl, or cyanoalkyl; R5 is alkanediyl, wherein the free valencies are separated by 3, 4, or 5 carbon atoms; R6 is hydrocarbylene, wherein the free valencies are separated by 2, 3, or 4 carbon atoms; M is titanium or zirconium; m is an integer from 0 to 3 when M is titanium or an integer from 0 to 4 when M is zirconium; n is an integer from 1 to 3 when M is titanium or an integer from 1 to 4 when M is zirconium; and p is 1 or 2; provided at least one R1, R2, R3,R4, R5, or R6 per molecule contains at least one aliphatic carbon-carbon multiple bond; and(D) a catalytic amount of a hydrosilylation catalyst.