A fluorine-containing copolymer for paints, having Mn of 5000 to 50000 and Mw/Mn of 2 to 10, which consists essentially of 30 to 70 % by mole of the fluoroolefin unit, 15 to 45 % by mole of the vinyl ether or vinyl ester unit, 1 to 30 % by mole of the hydroxyalkyl vinyl ether unit, and 4 to 30 % by mole of the carboxyl-containing unit wherein the carboxyl group is neutralized in an amount of 30 % or more with ammonia or a tertiary amine. This copolymer can give a good coating film without water spot and dewetting as well as with a good levelling property, while maintaining the excellent properties which a fluorine resin has by nature.
一种用于涂料的含
氟共聚物,其 Mn 为 5000 至 50000,Mw/Mn 为 2 至 10,主要由 30% 至 70% (以摩尔计)的
氟烯烃单元、15% 至 45% (以摩尔计)的
乙烯基醚或
乙烯基酯单元、1% 至 30% (以摩尔计)的羟基烷基
乙烯基醚单元和 4% 至 30% (以摩尔计)的含羧基单元组成,其中羧基用
氨或叔胺中和的量为 30% 或更多。这种共聚物可以形成良好的涂膜,不会产生
水斑和露点,并具有良好的流平性,同时还能保持
氟树脂所具有的优良特性。