AQUEOUS COATING COMPOUND FOR ELECTRO DIP LACQUERING AND ITS USE FOR THE PREPARATION OF MULTILAYERED LACQUER COATS

摘要

1. Aqueous coating compound for electro dip lacquering. 2.1 Previous coating compounds containing polymer micro particles for electro dip lacquering had insufficient adherence to the substrate or to subsequently applied layers. A coating compound resulting in improved appearance combined with a smooth surface, good impact strength, good covering of the edges and improved rheological properties is to be provided. 2.2 In addition to containing film-forming resins and optionally cross-linking agents, pigments, solvents and conventional additives, the aqueous coating compound contains polymer powders having an average particle diameter of from 0.1 to 100 .mu.m and a glass transition temperature of ?70.degree.C, obtained from one or more cross-linked urea-aldehyde resins, triazinealdehyde resins and phenol-aldehyde resins or one or more uncross-linked homo- or copolymers of acrylonitrile and/or methacrylonitrile and having a weight average molecular weight above 100,000 and containing at least 70% by weight of copolymerised acrylonitrile and/or methacrylonitrile or mixtures thereof, these powders being added to the coating compound after having been ground up with a triturating resin. 2.3 Preparation of; single layered or multi-layered lacquerings.