TWO-COMPONENT AQUEOUS POLYURETHANE COATING COMPOSITION AND LOW-GLOSS COATING FORMED THEREBY

摘要

The present application is directed to a two-component waterborne polyurethane coating composition including: a film-forming resin composition, comprising an aqueous dispersion of hydroxyl acrylic polymer particles with a core-shell structure; and a polyisocyanate crosslinker, wherein the hydroxyl acrylic polymer particles with a core-shell structure includes a shell formed by a copolymer A and an inner core formed by a copolymer B; and wherein the copolymer A has a glass transition temperature ranging from -20°C to 60°C, the copolymer B has a glass transition temperature ranging from 20°C to 100°C, and the hydroxyl acrylic polymer particles with a core-shell structure have a glass transition temperature ranging from 10°C to 90°C. The present application also relates to a low gloss coating formed by the two-component waterborne polyurethane coating composition.