METHOD FOR PREVENTING BLOCKING OF RUBBER

• Main Authors: HIRAMATSU FUMIO, KAWASHIMA AKIYOSHI
• Format: Patent
• Language: English
• Published: 25.09.1991
• 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; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS THEREFOR; WOODSTAINS; WORKING-UP

PURPOSE:To prevent the blocking of a halogen-containing rubber molded article to the contacting object by coating the article with a reactive silicone liquid composed of a specific composition and drying the applied liquid. CONSTITUTION:A molded article of a halogen-containing rubber (e.g. chloroprene rubber or epichlorohydrin rubber) is coated with a reactive silicone liquid composed of (A) 100 pts.wt. of an organic polysiloxane, (B) 80-120 pts.wt. of a silane coupling agent and (C) 5-15 pts.wt. of an organic metal salt and the coating layer is dried by heating at 80-120 deg.C for 5-20min to form a coating film having an average thickness of 1-20mum, preferably 5-10mum.