Patent ID: 6737494
Filing Date: 2004-05-18
Classification: C08G,C08K,C08L,Y10S

Abstract:
A one part moisture curable room temperature vulcanizable silicone composition comprising an alkylalkoxyacyloxysilane selected from the group consisting of R1 Si R2aR33-a, R4 R5bR63-bSiâ€”Oâ€”Si R7 R8cR93-c and mixtures thereof; where R1; R4 and R7 are independently selected from the group of alkyl radicals having the formula (CH2)nX, where n is 1 to 10, and X is selected from the group consisting of hydrogen, amino, epoxy, cyano, thiocyano, allyl, and vinyl; R2 R5 and R8 are independently selected from the group of acyloxy radicals having the formula OC(O)(CH2)mH, where m is 1 to 8; R3, R6 and R9 are independently selected from the group of alkoxy radicals or mixture of alkoxy radicals having 1 to 10 carbon atoms wherein the subscripts a, b and c are subject to the following limitations: 0(A) from about 1 to about 99 weight percent of a silanol stopped polydimethylsiloxane having a viscosity ranging from about 1,000 to about 500,000 centipoise (cps) at 25Â° C.; (B) from about 1 to about 99 weight percent of a silanol stopped polydimethylsiloxane having a viscosity ranging from about 5 to about 3,000 centipoise (cps) at 25Â° C.; (C) from about 0.1 to about 30 weight percent of an alkylalkoxyacyloxysilane cross-linker compound selected from the group consisting of R1 Si R2aR33-a, R4 R5bR63-bSiâ€”Oâ€”Si R7 R8cR93-c and mixtures thereof; where R1, R4 and R7 are independently selected from the group of alkyl radicals having the formula (CH2)nX, where n is 1 to 10, and X is selected from the group consisting of hydrogen, amino, epoxy, cyano, thiocyano, allyl, and vinyl; R2 R5 and R8 are independently selected from the group of acyloxy radicals having the formula OC(O)(CH2)mH, where m is 1 to 8; R3, R6 and R9 are independently selected from the group of alkoxy radicals or mixture of alkoxy radicals of 1 to 10 carbon atoms wherein the subscripts a, b and c are subject to the following limitations: 0(D) from about 0.01 to about 10 weight percent of a tin condensation cure catalyst selected from the group consisting of dibutyltindilaurate, dibutyltindiacetate, dibutyldibutoxytin, dibutyldimethoxytin, and dibutyldineodecanoatetin.