AQUEOUS ELECTROPHORETIC COATING BY CATHODIC DEPOSITION AND METHOD FOR COATING AN ELECTRIC CONDUCTOR SUBSTRATE

摘要

Aqueous coating by cathodic deposition containing amino and/or hydroxyl groups in a synthetic resin which may be made water soluble by acid addition. The resin contains a mixture of cross-linking agents, pigments, ballasts, corrosion inhibitors, lacquer agents and optionally catalists and of an organic solvent in a proportion up to 15% of the total weight of the coating. The mixture of cross-linking agents contains at least two cross-linking agents with different reactivities based on activated esters and/or with blocked polyisocyanates blocking agents. By "different reactivities" it is understood that the cross-linking reactions start at temperatures which differ by 10C at least. The cross-linking agent which acts in the first place comprises from 50 to 60 mole percent of the mixture of cross-linking agents.