| abstract |
(57) [Summary] (Corrected) [PROBLEMS] A silicone rubber composition for an in-situ molded gasket, which has excellent pressure resistance immediately after coating and cures to have excellent pressure resistance and adhesiveness. SOLUTION: (A) (a) Polyorganosiloxane 5 to 95 containing at least two alkoxy groups in one molecule % And (b) 95 to 5% by weight of polyorganosiloxane containing at least two lower alkenyl groups in one molecule 100 parts by weight of a mixture with (B) at least 2 in one molecule Polyorganosiloxane containing one silicon atom-bonded hydrogen atom (amount in which the molar ratio of silicon atom-bonded hydrogen atom to alkenyl group of component (b) is 0.3 to 10), (C) General formula R 1 a Si (OR 2 ) 4-a (wherein R 1 is a monovalent hydrocarbon group, an epoxy group or the like, R 2 is an alkyl group or the like, a Is 0, 1 or 2. ) 0.01 to 20 parts by weight of an alkoxysilane or a partial hydrolysis-condensation product thereof, 0.01 to 20 parts by weight of a (D) condensation reaction catalyst, and a catalytic amount of (E) a platinum-based catalyst. . |