Preparation method of organosilicone-modified polyurethane coating

• Main Authors: CHEN WEI, WU JUN, WANG JIANBIN, CHEN TIANAN
• Format: Patent
• Language: English
• Published: 03.06.2015
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; 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 MATERIALS THEREFOR; WOODSTAINS

The invention provides a preparation method of an organosilicone-modified polyurethane coating. The preparation method comprises the following steps: increasing the temperature of an oil bath pan to 55-65 DEG C, adding 18-30 parts by weight of toluene diisocynate or hexamethylene diisocyanate into a three-necked flask, blowing nitrogen for protection, starting stirring, dropwise adding 68-78 parts by weight of hydroxypropyl-blocked polydimethylsiloxane or hydroxybutyl-blocked polydimethylsiloxane into the three-necked flask, and stirring for 4 hours; increasing the temperature of oil bath to 70-80DEG C, adding 8-18 parts by weight of toluene diisocynate or hexamethylene diisocyanate into the three-necked flask, and dropwise adding 60-80 parts by weight of polypropylene glycol; continuously stirring for 4-6 hours and cooling to room temperature, to obtain an organosilicone-modified polyurethane coating base stock; evenly mixing 100g of organosilicone-modified polyurethane coating base stock with 5-7g of dimorpholinyl diethyl ether toluene solution, coating a leather surface in a scraping manner, and curing at room temperature, to obtain the organosilicone-modified polyurethane coating.