| 摘要 |
PROBLEM TO BE SOLVED: To provide a melamine-curable aqueous coating composition excellent in adhesion to both a coating film and a low-polarity plastic-made substrate. SOLUTION: The aqueous coating composition for a plastic-made substrate contains (A) a polyester resin having an acid value of 15-100, a hydroxy value of 35-200, and a number average mol.wt. of 800-10,000, (B) a melamine resin, (C) an alkylbenzenesulfonic acid or alkylsulfuric acid represented by formula (1): R-ASO<SB>3</SB>H (wherein R is an 8-24C alkyl; and A is a phenylene group or an oxygen atom) in a quantity of 0.5-10 pts.wt. based on 100 pts.wt. solid resin component, and (D) an aqueous medium. COPYRIGHT: (C)2005,JPO&NCIPI |
