Patent ID: 8299163

Claim:
A water-based paint composition comprising: water-dispersible acrylic polymer particles (A), hydroxyl-containing resin (B) and curing agent (C), the water-dispersible acrylic polymer particles (A) having a weight-average molecular weight of at least 1,100,000 and an absorbance in a liquid dispersion at a mass concentration of 1.35% in 1,4-dioxane solvent of not higher than 0.2 at a wavelength of 330 nm as measured with a spectrophotometer, wherein the water-dispersable acrylic polymer particles (A) are obtained by emulsion polymerization of polymerizable unsaturated monomers with an azo compound as a radical polymerization initiator, and wherein the hydroxyl-containing resin (B) is selected from the group consisting of (i) a hydroxyl-containing acrylic resin having a weight-average molecular weight within a range of 1,000-200,000 and (ii) a hydroxyl-containing polyester resin having a weight-average molecular weight within a range of 1,000-200,000.