Electrocoating composition.

摘要

The present invention provides an electrocoating composition comprising a copolymer having both an aminimide group and an amino group, and a modified polyepoxide resin. The electrocoating composition of the present invention comprises; (A) 10 to 49 % by weight of a vinyl polymer containing at least one amino group and at least one group represented by <CHEM> wherein R1 and R2 respectively represent a hydrogen atom, an alkyl group or an aryl group, R3 represents an alkyl group or a hydroxyalkyl group, R2 and R3 together form a heterocyclic ring having a nitrogen atom, X represents an alkyl group, an aryl group or an aralkyl group, n is an integer of 1 to 4 and m is 0 or 1, (B) 51 to 90 % by weight of a modified polyepoxide resin containing basic group of 20 to 200 mmol based on 100 g solid content. o