COMPOSITION DE REVETEMENT, CONTENANT DE L'ORGANOSILANE-POLYOL ET DILUABLE A L'EAU

• Main Author: WEN-HSUAN CHANG, KYU-WANG LEE ET JOHN B. SAUNDERS, JR
• Format: Patent
• Language: French
• Published: 23.10.1987
• Edition: 4
• Subjects: ADHESIVES; 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; IMPREGNATING OR COATING OF PAPER; 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; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS THEREFOR; WOODSTAINS

A water reducible coating compsn. comprises (A) an organosilane-polyol having a hydroxyl no. of at least 70, comprising the reaction product of (1) hydrophilic polyol having hydroxy no. of at least 300; and (2) organosilane and/or hydrolysed and condensed organosilane and; (B) aminoplast resin, phenoplast resin and/or blocked polyisocyanate as curing agent. The compsn. may also contain an org. solvent, unreacted polyol, unreacted hydrolysed and condensed organosilane, and water. The sum of the components (A) and (B), unreacted polyol and unreacted hydrolysed and condensed organosilane is at least 60 wt.%. The compsn. on curing on a substrate, exhibits excellent short- and long term tape release props when used e.g. as protection over paper present in plywood, hardboard or particle board panels contg. a paper overlay.