Patent ID: 6106684
Filing Date: 2000-08-22
Classification: C09D

Abstract:
A cationic electrodeposition coating process which comprises the steps of:(1) immersing a substrate in a cationic electrodeposition coating composition;(2) applying a voltage between an anode and said substrate, which serves as a cathode, to thereby cause coat film deposition; and(3) further applying a voltage to the coat film deposited to increase electric resistance per unit volume of said coat film to a level of not less than two-fold,wherein, in said step (3), coat films are deposited at those sites of the substrate where coat films have not yet been deposited, said cationic electrodeposition coating composition, when deposited, having a time point when the electric resistance per unit volume of the coat film deposited increase in the course of electrodeposition under constant-current conditions.