| abstract |
A water-based undercoating composition that can be used as a one-pack type that is excellent in water resistance and abrasiveness and also has excellent adhesion to a coated surface. SOLUTION: (A) (a) Styrene, (b) Acid group-containing polymerizable unsaturated monomer, (c) Hydroxyl group-containing polymerizable unsaturated monomer, and (d) Other polymerizable unsaturated monomers are used as copolymerization components. An emulsion polymer containing 30% by weight or more of styrene, (B) an aqueous urethane resin, (C) (e) a bridged alicyclic hydrocarbon group-containing polymerizable unsaturated monomer, (B) an acid group-containing polymerizable unsaturated monomer, (c) a hydroxyl group-containing polymerizable unsaturated monomer, and (f) an acrylic resin having a copolymerizable component of another polymerizable unsaturated monomer and (D) a pigment, Aqueous undercoat containing 100 to 350 parts by weight of pigment (D) with respect to 100 parts by weight of total resin solids in the composition and 50 to 200 parts by weight of extender pigments with respect to 100 parts by weight of total resin solids Paint composition. [Selection figure] None |