| 摘要 |
PURPOSE:To provide the titled compsn. which gives cured articles whose surface is hardly stained and does not stain a substrate in contact therewith, by blending a hardener with an organopolysiloxane contg. an org. group attached to the silicon atom and silanol groups. CONSTITUTION:An organopolysiloxane (A) contg. an org. group of formula I (wherein R<1>, R<2> are each a bivalent alkylene; R<3> is a terminal blocking group; n is 0, 1 or greater) attached to the silicon atom and at least two silanol groups per molecule, is mixed with a hardener (B) such as methyl-trimethoxysilane or dibutyltin diacetate to obtain the desired room temperature curing organopolysiloxane compsn. This compsn. is suitable for use as a sealing material. Component A can be obtd. by hydrolyzing a silane of formula II (wherein R is an org. group attached to silicon atoms other than the group of formula I , X is a hydrolyzable group attached to the silicon atom).
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