AQUEOUS COATING COMPOSITION

摘要

Disclosed is an aqueous coating composition comprising 10 to 80 parts by mass of an emulsion resin (A), 0.01 to 20 parts by mass of a viscosity modifier (B) and 10 to 100 parts by mass of a hydrophobic solvent (C). The emulsion resin (A) has a core/shell-type double-layered structure having a core and a shell, wherein the core comprises a copolymer (I) made of, as copolymerization components, 0.1 to 30% by mass of a polymerizable unsaturated monomer having two or more polymerizable unsaturated groups in the molecule and 70 to 99.9% by mass of a polymerizable unsaturated monomer having one polymerizable unsaturated group in the molecule, and the shell comprises a copolymer (II) made of, as copolymerization components, 5 to 50% by mass of a hydrophobic polymerizable unsaturated monomer and 50 to 95% by mass of other polymerizable unsaturated monomer. In the emulsion resin (A), the ratio between the solid content of the copolymer (I) and the solid content of the copolymer (II) (copolymer (I)/copolymer (II)) is 10/90 to 90/10. The aqueous coating composition can form a coating film having less metallic unevenness and having excellent flip-flop property and smoothness.