Patent ID: 7534840
Filing Date: 2009-05-19
Classification: C08G,C08L,Y10T

Abstract:
1. A room temperature-curable organopolysiloxane composition comprising (A) 100 parts by weight of an organopolysiloxane containing at least two Si—OH radicals or at least two organoxy radicals in the molecule and having a viscosity of at least 500 mPa-s at 25° C., (B) 0.5 to 20 parts by weight of an organosilane containing at least two organoxy radicals in the molecule or a partial hydrolyzate thereof, (C) 0.01 to 10 parts by weight of an organotin catalyst, and (D) 1 to 30 parts by weight of an Si—OH radical-containing organopolysiloxane represented by the average compositional formula (1): wherein R and R 1 are each independently a substituted or unsubstituted monovalent hydrocarbon radical, the subscripts a, b and c are numbers satisfying 0.01<a<0.2, 0≦b<0.4, 1.7<c<1.9, and 1.6<a+b+c<2.5, and having a viscosity of up to 300 mPa-s at 25° C.