TWO-COMPONENT AQUEOUS POLYURETHANE COATING COMPOSITION AND LOW-GLOSS COATING FORMED THEREBY
申请人:Guangdong Huarun Paints Co., Ltd.
公开号:EP3901229A1
公开(公告)日:2021-10-27
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.
本申请涉及一种双组分水性聚氨酯涂料组合物,包括成膜树脂组合物,包括具有核壳结构的羟基丙烯酸聚合物颗粒的水性分散体;和 聚异氰酸酯交联剂,其中具有核壳结构的羟基丙烯酸聚合物颗粒包括由共聚物 A 形成的外壳和由共聚物 B 形成的内核;其中共聚物 A 的玻璃化温度范围为 -20°C 至 60°C,共聚物 B 的玻璃化温度范围为 20°C 至 100°C,具有核壳结构的羟基丙烯酸聚合物颗粒的玻璃化温度范围为 10°C 至 90°C。本申请还涉及一种由双组分水性聚氨酯涂料组合物形成的低光泽涂层。