The invention relates to a process for the preparation of an acrylate copolymer having a number average molecular weight of 400-2000 by polymerization of a monomer mixture consisting of 35-60 mole % of styrene and/or a-methyl styrene, 20-60 mole % of acrylic acid and/or methacrylic acid and 0-30 mole % of one or more other monovinyl compounds in the presence of a 2 to 8 carbon atoms-containing mercaptomonocarboxylic acid or mercaptodicarboxylic acid as chain length regulator in an amount of 0.05 to 0.2 moles per mole of the monomeric compounds, after which the resulting reaction product is brought into reaction with a glycidyl ester of a monocarboxylic acid. The invention also relates to a liquid coating composition having a solids content of at least 60% by weight based on the acrylate copolymer thus prepared and a curing agent.
本发明涉及一种
丙烯酸酯共聚物的制备工艺,该共聚物的平均分子量为 400-2000,其制备方法是:在含 2 至 8 个碳原子的巯基单
羧酸或巯基二
羧酸作为链长调节剂的存在下,聚合由 35-60 摩尔%的
苯乙烯和/或 a-
甲基苯乙烯、20-60 摩尔%的
丙烯酸和/或
甲基丙烯酸以及 0-30 摩尔%的一种或多种其它单
乙烯基化合物组成的单体混合物,每摩尔单体化合物中巯基单
羧酸或巯基二
羧酸的用量为 0.05 至 0.2 摩尔。05至0.2摩尔/摩尔的单体化合物,然后将所得反应产物与单
羧酸的
缩水甘油酯反应。本发明还涉及一种液体涂料组合物,以由此制备的
丙烯酸酯共聚物和固化剂为基础,固体含量至少为 60%(按重量计)。