| 摘要 |
A cationic electrodeposition coating composition for forming a multilayer film, said composition comprising (A) an epoxy-type cationic electrodepositable resin which is an addition-reaction product formed between an epoxy resin and a basic amino compound, having a surface tension of 40 to 60 dynes/cm and being capable of forming a cathodically depositable aqueous bath by neutralization with an acid, (B) a non-ionic, non-selfcurable, film-forming resin having a surface tension of 25 to 45 dynes/cm, and (C) a blocked polyisocyanate compound as a curing agent, the weight ratio of resin (A) to resin (B) being from 60:40 to 98:2, and the surface tension of resin (A) being at least 5 dynes/cm higher than that of resin (B), and resin (A), resin (B) and the polyisocyanate compound (C) having substantially no ethylenically double bond.
|
