Water-resistant coating composition for high impact with acrylic core-shell emulsion polymer

摘要

The present invention relates to a water-soluble coating composition prepared by introducing an acrylic core-shell emulsion polymer having excellent weatherability and impact resistance into a water dispersion polyurethane main resin composition and a water dispersion polyisocyanate cured resin composition. Polyurethane polyester polyol resin and water-dispersed polyurethane polyester polyol resin are mixed at a solids ratio of 2: 1 to 4: 1, and water-dispersed block polyisocyanate is prepared as a curable resin, and the hydroxyl group of the main resin and the isocyanate group of the curable resin Water-dispersed polyurethane main resin composition, acrylic core-shell emulsion polymer, fluidity regulator, molten silica type thickener, dispersant, such that the equivalent ratio is 1: 1.4-1: 0.75, and the solid content ratio is 50: 50-85: 25. Excellent low temperature curing and non-yellowing, including antifoaming agent, leveling agent, coarse solvent, pigment and extender pigment It relates to an aqueous coating composition having weather resistance and impact resistance.