BATHS FOR ELECTROPHORETIC LACQUERING CAPABLE OF CATHODIC DEPOSITION WITH ADDITIVES FOR ENHANCING SURFACE APPEARANCE AND THE USE OF SAID ADDITIVES IN COATING PROCESSES

摘要

Aqueous baths for electrophoretic lacquering containing binding agents capable of cathodic deposition and containing as additives for enhancing surface appearance, in particular as anti-cratering agents, 0.1 to 3% by weight of one or several (meth)acrylic copolymers with an amine number of 15 - 150 and an OH-number of 15 - 450, together with 0.1 to 2% by weight of one or several polyesters with .beta.-hydroxyalkyl ester groups, with an acid number of 0 to 3 and a weight average molecular weight of 1000 to 10000, and/or together with 0.1 to 5% by weight of one or several homopolymers or copolymers of one or several alkylvinyl ethers with 1 - 5 carbon atoms in the alkyl residue, with a weight average molecular weight of 500 to 10000, whereby the percentages by weight relate to the solids content of the binding agents, and process for the coating of substrates that conduct electricity.