| 摘要 |
PURPOSE:To obtain an organopolysiloxane composition, comprising a specific composition and useful as a surface treating agent for a cured rubber molding capable of providing a cured film excellent in non-blocking properties, water repellency, lubricity and abrasion durability to the rubbelr surface. CONSTITUTION:This composition comprises (A) 100 pts.wt. diorganopolysiloxane expressed by formula I [R<1> is a (substituted) monovalent hydrocarbon; (m) is 150-10000], (B) 5-80 pts.wt. diorganopolysiloxane expressed by formula II (R<2> is R<1>; (n) is same as (m) or a larger number than that], (C) 0.2-30 pts.wt. silane and/or siloxane having >=3 hydrolyzable functional groups, (D) 1-20 pts.wt. organosilane having >=2 alkoxy groups bound to Si and one mercapto group bound through an alkylene to Si and/or its hydrolyzate, (E) 5-150 pts.wt. organosilane having Z 2 alkoxy groups bound to Si and one (substituted) amino bound through an alkylene to Si and/or its hydrolyzate, (F) a condensing catalyst and (G) fine powder having <=50mum average particle diameter. |
