The present invention relates to a coating composition, a coating system comprising the coating composition, a coating method and application of the coating system, and a product coated with the coating system. The coating composition comprises: (A) at least one aqueous polyurethane dispersion and/or one aqueous polyacrylate dispersion, wherein the aqueous polyurethane dispersion comprises at least one polyurethane polymer (a), wherein the polyurethane polymer (a) is obtained by a reaction comprising at least one polyurethane prepolymer (a1) and at least one isocyanate-reactive component (a2), wherein the polyurethane prepolymer (a1) is obtained by a reaction comprising the following components: (a1-1) at least one polyisocyanate having an isocyanate functionality of no less than 2, and (a1-2) at least one polyfunctional polyether polyol having a hydroxyl functionality of no less than 3, wherein the polyfunctional polyether polyol has an amount of 1 wt % to 20 wt %, based on the amount of the components for preparing the polyurethane prepolymer being 100 wt %, and (B) at least one crosslinking agent.
本发明涉及一种涂料组合物、一种包含该涂料组合物的涂料体系、一种涂料方法和该涂料体系的应用,以及一种涂有该涂料体系的产品。涂料组合物包括: (A) 至少一种聚
氨酯
水性分散体和/或一种聚
丙烯酸酯
水性分散体,其中聚
氨酯
水性分散体包括至少一种聚
氨酯聚合物(a),聚
氨酯聚合物(a)由至少一种聚
氨酯预聚物(a1)和至少一种
异氰酸酯反应组分(a2)反应得到,其中聚
氨酯预聚物(a1)由以下组分反应得到:(a1-1) 至少一种多
异氰酸酯,其
异氰酸酯官能度不低于 2,和 (a1-2) 至少一种多官能度聚醚多元醇,其羟基官能度不低于 3,其中多官能度聚醚多元醇的用量为 1 wt % 至 20 wt %,以制备聚
氨酯预聚物的组分用量为 100 wt % 为基础,和 (B) 至少一种
交联剂。