AQUEOUS COATING AND MANUFACTURE

2.1 Cataphoretically depositable coating compositions are under constant pressure to have a lower solvent content and baking temperature without jeopardising the throw power and corrosion protection properties. The novel aqueous coating composition shall improve this property. … 2.2 An aqueous coating composition, which may optionally contain crosslinking catalysts, pigments, fillers, corrosion inhibitors and customary coating auxiliaries, contains as binder… A) from 40 to 95 % by weight of an amino-epoxy resin, containing at least one primary amino group and at least one urea group per molecule, as hydrolysis product of an amino-epoxy resin, said amino-epoxy resin being obtainable by reaction of an epoxy resin-polyamine adduct with a carbonyl-containing solvent under azeotropic removal of water, subsequent reaction of the resulting imine product with polyisocyanates or isocyanato-containing prepolymers, the epoxy resin-polyamine adduct having been modified with non-hydrolysable or highly hydrolysis-resistant alkyl or aryl radicals and having at least one primary and at least one secondary amino group per molecule; and… B) from 5 to 60 % by weight of a crosslinking agent which reacts with amino groups and/or hydroxyl groups. … 2.3 Preparation of electrophoretic coatings.