Patent ID: 7935764

Claim:
A curable resin composition comprising: (A) a carboxyl group-containing acryl resin having (a) a carboxyl group originating in a carboxyl group-containing polymerizable unsaturated monomer selected from the group consisting of acrylic acid, methacrylic acid, maleic acid and itaconic acid and (b) a carboxyl group originating in a carboxyl group-containing polymerizable unsaturated monomer having a polymerizable carbon-carbon double bond and a carboxyl group separated from the double bond by at least 6 carbon atoms, which is obtained by subjecting a hydroxyl group-containing polymerizable unsaturated monomer to semi-esterification with saturated dicarboxylic acids; (B) an epoxy group-containing acryl resin and (C) a curing catalyst, the component (A) having an acid value of 30 to 150 mg KOH/g based on the monomer (a), an acid value of 50 to 140 mg KOH/g based on the monomer (b) and a total acid value of 130 to 180 mg KOH/g, and the component (C) comprising a combination of a quaternary ammonium salt and a phosphate base compound.