The invention relates to the use of aqueous compositions comprising:
i) at least one aqueous polymer dispersion whose addition polymer P has a glass transition temperature below 0° C. and contains in copolymerized form
from 80 to 99.5% by weight of at least one monoethylenically unsaturated, hydrophobic monomer A,
from 0.5 to 10% by weight of at least one ethylenically unsaturated monocarboxylic or dicarboxylic acid or its anhydride as monomer B, and if desired
from 0 to 10% by weight of one or more ethylenically unsaturated monomers C, different than the monomers A and B, the weight fractions of the monomers A, B and C adding up to 100% by weight,
ii) at least one water-soluble salt or complex salt of an at least divalent metal cation
to produce a basecoat for the coating of metal components.
本发明涉及
水性组合物的使用,该组合物包括
i) 至少一种
水性聚合物分散体,其添加聚合物 P 的
玻璃化转变温度低于 0℃,并以共聚形式含有
至少一种单
乙烯基不饱和疏
水单体 A,重量占 80%至 99.5%、
0.5 至 10%(按重量计)的至少一种
乙烯基不饱和单
羧酸或二
羧酸或其酸酐作为单体 B,以及(如需要)0 至 10%(按重量计)的一种
乙烯基不饱和单
羧酸或二
羧酸或其酸酐作为单体 B
0 至 10%(按重量计)的一种或多种
乙烯不饱和单体 C,不同于单体 A 和 B,单体 A、B 和 C 的重量分数相加不超过 100%(按重量计)、
二价
金属阳离子的至少一种
水溶性盐或络合盐
以生产用于
金属部件涂层的底漆。