Abstract: Cathodic electrodeposition paint (CEP) was synthesized with amino epoxy resin, and the properties of the paint film was investigated. The results showed that properties of the paint film varied with various catalytic curing agent under the condition of electrodeposition for 2 min at pH 6～7. By comparing properties of the paint film, the superior paint film was obtained from the cathodic electrodeposition coating materials by mixing cobalt and lead salts as catalytic curing agent under the condition of oven-curing for 20 min at 160℃ to form completely cured film of high hardness with good resistances against water, acid, alkali and salt.

Key words: catalytic curing agent, amino-epoxy resin, paint film, cathodic electrodeposition paint (CEP)