| abstract |
[PROBLEMS] To provide a resin composition for a primer coating that has a corrosion resistance, chemical resistance, workability, adhesion, etc. that are equal to or higher than those when a chromium-based rust inhibitor is used. The object is to provide a coated metal plate which is laminated and cured. SOLUTION: The aromatic polyester resin (A) and the hyperbranched polymer (B) having a number average molecular weight of 10,000 or more are included, and the hydroxyl value with respect to the total weight of (A) and (B) is 25 KOHmg / g or more and 120 KOHmg / g. And a coated metal sheet coated with the coating composition described on the left. [Selection figure] None |