COATING PROCESS

摘要

A process for coating a conductive substrate comprises immersing the substrate in a coating compsn. consisting of an aq. medium and a dispersed coating material, making the substrate cathodic in an electric circuit, and passing an electric current between the cathode and a counter-electrode until a desired amount of coating material is deposited on the substrate. The coating material comprises a film- forming polymer stabilized as a dispersion of particles in the aq. medium and is free from stabilizing ionic charges. The polymer comprises a polymeric non-ionic hydrophilic moiety which is solvated by the aq. medium. The coating polymer has a low electrophoretic mobility.