ACRYLIC RESIN FOR COATING MATERIAL AND ITS PRODUCTION

• Main Authors: OSANAI YOSHITAKA, KOBAYASHI HIROYUKI, KAGEISHI KAZUJI
• Format: Patent
• Language: English
• Published: 19.05.1998
• Edition: 6
• 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 BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED 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

PROBLEM TO BE SOLVED: To produce the subject one-pack type resin, enabling the low- temperature baking, excellent in adhesion, chemical resistance, etc., and useful as even an anion electrodeposition coating material, etc., by polymerizing a specific composition according to a specified method. SOLUTION: This acrylic resin is a copolymer of (A) an acrylic or a methacrylic ester monomer, (B) an α,β-unsaturated carboxylic acid, (C) a hydroxyl group-containing unsaturated monomer, (D) a monomer derived from (meth) acrylamide and (E) other unsaturated monomers and has 5,000-100,000 weight- average molecular weight, 10-80mg KOH/g-R acid value, 30-120mg KOH/g-R hydroxy value and -30 to +100 deg.C glass transition temperature. The component D is preferably methoxymethylacrylamide, etc., and the component E is preferably styrene. When copolymerization is carried out, (1/20) to (16/20) of the monomer mixture is preferably prepolymerized and the residual monomer mixture is dropped to the resultant prepolymerized mixture to perform the polymerization.