Organopolysiloxane compositions, their preparation and use, articles coated with them.

摘要

An organopolysiloxane composition contains (A) a both end hydroxyl - blocked diorganopoly - siloxane, (B) an inert diorganopolysiloxane, (C) a silane or siloxane having at least three hydrolyzable functional groups, (D) an organosilane having at least two alkoxy groups each attached to a silicon atom and one mercapto group separated from a silicon atom by an alkylene group or a partial hydrolyzate thereof, (E) an organosilane having at least two alkoxy groups each attached to a silicon atom and one amino group separated from a silicon atom by an alkylene group or a partial hydrolyzate thereof, (F) a condensation catalyst, and (G) a fine powder, typically of polycarbonate, having a mean particle size of 0.1 - 50 mu m. The composition is useful as a surface treating agent for cured rubber moldings for imparting non - tackiness, water repellency and lubricity to the rubber surface and forming a long-lasting abrasion resistant coating.