| abstract |
(57) [Problem] To provide a resin composition for a cationic electrodeposition coating material capable of forming an electrodeposition coating film having excellent corrosion resistance, finished appearance, and weather resistance. SOLUTION: 2 to 30 parts by weight of an epoxy group-containing polymerizable unsaturated monomer (a-1) and another polymerizable unsaturated monomer (a-2) copolymerizable with the monomer (a-1) 7 Amine-modified vinyl obtained by subjecting a secondary amine to an addition reaction with an epoxy group-containing vinyl copolymer having a weight average molecular weight of 2,000 to 20,000, obtained by copolymerizing 0 to 98 parts by weight with a catalytic chain transfer polymerization method. A resin composition for a cationic electrodeposition coating composition, comprising a resin (A) and a blocked polyisocyanate (B). |