| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for forming a coating film on a part of a hard resin product, excellent in low-temperature curing property, adhesion property and finishing property. SOLUTION: The method for forming the coating film is composed of coating a coloring base paint and a clear paint on the part of the hard resin product and curing both the films. The clear paint, containing a hydroxyl group-containing acrylic resin (A) having a hydroxy group value of 80-160 mgKOH/g and a curing agent (B) are used, wherein a content of the acrylic resin (A) is 60-90wt% and the content of the curing agent (B) is 10-40wt% based on a total fixed content of the acrylic resin (A) and the curing agent (B). This hydroxyl group-containing acrylic resin (A) is obtained by radical-copolymerizing (a) a primary hydroxyl group containing monomer of 8-30wt%, (b) a secondary hydroxyl group-containing monomer of 10-40wt%, selected from 4-hydroxybutyl(metha)acrylate monomer andε-caprolactone modified vinyl monomers that are obtained by ring-opening polymeriziation ofε-caprolactone with hydroxyalkyl(metha)acrylate, and (c) other polymerizable unsaturated monomer of 30-82wt%. COPYRIGHT: (C)2005,JPO&NCIPI
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