The present invention deals with acrylic or methacrylic acid copolymers and improved autodeposition coating composition containing the same.
The new acrylic polymer contains 1-20% of methacrylic acid or 1-12% of acrylic acid, with 75-99% of at least one vinylenically monounsaturated monomer and optionally a hydroxy-containing monomer and a cross-linker and it has a gloss transition temperature of from 2 to 50°C.
This acrylic polymer, used under the form of a latex with water and a source of hydrogen ion, provides an aqueous autodeposition coating composition having improved gloss and corrosion, rinse, heat-aging and gasoline resistance.
本发明涉及
丙烯酸或
甲基丙烯酸共聚物以及含有这些共聚物的改良型自沉积涂料组合物。
这种新型
丙烯酸聚合物含有 1-20% 的
甲基丙烯酸或 1-12% 的
丙烯酸,以及 75-99% 的至少一种
乙烯基单不饱和单体和可选的含羟基单体及
交联剂,其光泽转变温度为 2 至 50°C。
这种
丙烯酸聚合物以胶乳的形式与
水和氢离子源一起使用,可提供一种
水性自沉积涂料组合物,具有更好的光泽度和耐腐蚀性、耐冲洗性、耐热老化性和耐汽油性。