FILM-FORMING ORGANOPOLYSILOXANE COMPOSITION

• Main Authors: MOTOMURA HIDEYUKI, MURAKAMI ICHIRO
• Format: Patent
• Language: English
• Published: 10.03.1992
• Subjects: ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; FILLING PASTES; GENERAL PROCESSES OF COMPOUNDING; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS THEREFOR; WOODSTAINS; WORKING-UP

PURPOSE:To prepare the title compsn. which gives the surface of a rubber material excellent mold releasability and lubricity by compounding a major component comprising a specific organopolysiloxane block copolymer with specific organosilanes. CONSTITUTION:The title compsn. is prepd. by compounding 50-90% organopolysiloxane block copolymer comprising resinous organopolysiloxane units of formula I (wherein R is a monovalent hydrocarbon group; and X is 1.0-1.3 on average), terminal-blocked siloxane units of formula II (wherein R is a hydrolyzable group bound to an Si atom; R is a monovalent hydrocarbon group; and (y) is 1.8-2.0), and linear organopolysiloxane units of formula III (wherein R is a monovalent hydrocarbon group), 2-50% organosilane of formula IV (wherein R to R are each a monovalent hydrocarbon group; (a) and (b) are each 0 or 1-4 provided (a+b) is 3 or 4; and (c) is 0 or 1 provided (a+b+c+d) is 4), 4-40% mixture or condensate of an epoxidized organoalkoxysilane with an alkenylated organoacetoxysilane, 0.1-10% hydroxylated or alkoxylated diorganopolysiloxane, 0-10% inorg. or org. filler, 0.1-10% condensation catalyst, and an org. solvent.