| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a coating composition which can solve problems of a film derived from a coating composition using an acrylic resin that it does not have sufficient adhesion to a galvanized surface and that, when the film of the coating composition is exposed to water or moisture, its adhesion is liable to deteriorate.SOLUTION: The coating composition comprises an acrylic resin, a hydrazide compound, and an epoxy compound. Especially preferably, the acrylic resin contains a monomer having a carboxyl group, a ketone group, or an aldehyde group; the hydrazide compound contains two or more hydrazide groups in a molecule; and the epoxy compound contains two or more epoxy groups in a molecule. A preferable mixing ratio of these is, based on 100 pts.mass of the acrylic resin, the hydroxy compound of 0.1 to 30 pts.mass and the epoxy compound of 1 to 50 pts.mass.</p> |
