PROCESS FOR PRODUCING CATHODICALLY DEPOSITABLE ELECTRODEPOSITION COATING COMPOSITIONS AND URETHANE-BASED COATING COMPOSITIONS

摘要

Self-crosslinking coating composition which are cathodically deposited on electrodeposition of paints containing the coating composition and a process for producing aqueous solutions of the self-crosslinking coating compositions by acid neutralization are described. The coating compositions are the reaction products of an unsaturated copolymer or a polycondensation product or a polyaddition product or mixture thereof carrying at least 0.5 double bonds on a side chain or at the end of a chain for each 1000 molecular weight units and the reaction product carrying one free isocyanate group of a polyisocyanate with an amine of the general formula wherein R is an alkanol or hydroxyphenyl radical and R1 and R2 are alkyl, aryl or cycloalkyl radicals. The cathodically deposition electrodeposition paints cure rapidly at relatively low temperatures to provide films which are highly resistant to corrosive influences.