| abstract |
(57) [Summary] [Object] The present invention is an aqueous coating composition which forms a coating film having remarkably improved acid resistance and scratch resistance without deteriorating the finished appearance, weather resistance and physical performance. This product is suitable as a top coating for automobiles. [Structure] An acrylic resin comprising an acidic group-containing polymerizable unsaturated monomer, a hydroxyl group-containing polymerizable unsaturated monomer, a styrene-based monomer and other polymerizable unsaturated monomers, and having a styrene-based monomer content of 40 to 60% by weight. A water-based coating composition containing a thermosetting resin composition as a main component, which comprises the aqueous solution and / or aqueous dispersion of the above, and a crosslinking agent. |