The present invention relates to a coating composition, a coating method and use of the composition, and a product coated with the coating composition. The coating composition comprises: (a) an isocyanate-reactive component comprising: (al) at least one polyaspartic ester, and (a2) optionally a polyetheraspartic ester; (b) an isocyanate component comprising: (b1) at least one isocyanate prepolymer having an isocyanate group equivalent of 300 to 1100, and (b2) at least one isocyanate oligomer containing not less than two isocyanate groups, the weight ratio of the isocyanate prepolymer (b1) to the isocyanate oligomer (b2) being from 1:4 to 4:1; (c) a catalyst; and (d) optionally an additive; wherein the coating composition has a molar ratio of isocyanate groups to isocyanate-reactive groups of 1.5:1 to 8:1. The coating composition provided by the present invention has a long pot life, and the resulting coating has the advantages of fast drying and high hardness.
本发明涉及一种涂料组合物、该组合物的涂覆方法和用途,以及用该涂料组合物涂覆的产品。涂料组合物包括:(a)
异氰酸酯反应组分,包括:(al) 至少一种聚
天冬氨酸酯,和 (a2) 可选的一种聚醚
天冬氨酸酯;(b)
异氰酸酯组分,包括:(a1) 至少一种
异氰酸酯预聚物,其
异氰酸酯基团为:(a2) 聚醚
天冬氨酸酯;(a3) 聚醚
天冬氨酸酯:(b)
异氰酸酯组分包括:(b1) 至少一种
异氰酸酯预聚物,其
异氰酸酯基当量为 300 至 1100;(b2) 至少一种
异氰酸酯低聚物,其
异氰酸酯基不少于两个,
异氰酸酯预聚物 (b1) 与
异氰酸酯低聚物 (b2) 的重量比为 1:4至4:1;(c) 催化剂;和(d) 可选的添加剂;其中涂层组合物的
异氰酸酯基团与
异氰酸酯反应基团的摩尔比为1.5:1至8:1。本发明提供的涂料组合物具有较长的罐装寿命,所得涂料具有干燥快和硬度高的优点。