Patent ID: 7781507

Claim:
A room temperature-curable polyorganosiloxane composition comprising (a) 100 parts by weight of a polydiorganosiloxane represented by the following general formula (1) or (2): wherein R is independently an unsubstituted or substituted monovalent hydrocarbon group, a is an integer of at least 10, R 1 is independently an unsubstituted or substituted monovalent hydrocarbon group containing 1 to 6 carbon atoms, X is oxygen atom or an unsubstituted or substituted divalent hydrocarbon group containing 2 to 6 carbon atoms, and n is an integer of 1 to 3; (b) 0.5 to 10 parts by weight, per 100 parts by weight of component (a), of a triorganosilanol represented by general formula (3): R 2 3 SiOH (3) wherein R 2 is independently an unsubstituted or substituted monovalent hydrocarbon group containing 1 to 20 carbon atoms; (c) 1 to 20 parts by weight of an organosilane containing at least 3 hydrolyzable groups in one molecule and/or its partial hydrolysate; and (d) 10 to 300 parts by weight of calcium carbonate.