Cationic electro-deposition coating compositions

A cationic electro-deposition coating composition, which comprises:

• component (A):
• an amino-containing epoxy resin (A) obtained by adding an amino-containing compound (a-2) to an epoxy resin (a-1) having an epoxy equivalent of from 400 to 3000,
• component (B):
• an amino-containing acrylic resin (B) obtained by adding an amino-containing compound (b-4) to a copolymer resin obtained by radical copolymerization of, as essential components, a polylactone-modified hydroxyl-containing radical copolymerizable monomer (b-1), which is obtained by adding a lactone to a hydroxyl-containing acrylic monomer (b) and is represented by the following formula (1) or (2):
• CH2═C(R1)—R2—O—(CO—(CH2)m—O—)1—H (1)
• (wherein, R1 represents H or an alkyl group, R2 represents any one of —(CH2)n—, —(CO)O—(CH2)n— and —O—(CO)—(CH2)n—, l stands for an integer of 3 to 10, m stands for an integer of 4 to 8 and n stands for an integer of 1 to 10),
• 3
• (wherein, R1 represents H or an alkyl group, R2 represents any one of —(CH2)n—, —(CO)O—(CH2)n— and —O—(CO)—(CH2)n—, l stands for an integer of 3 to 10, k stands for an integer of 0 to 4 and n stands for an integer of 1 to 10), and glycidyl (meth)acrylate (b-2), and another radical copolymerizable monomer (b-3);
• and
• component (C):
• a blocked polyisocyanate curing agent (C) as a curing component, the component (A), component (B) and component (C) being added in amounts of 5 to 80 wt %, 5 to 80 wt % and 10 to 40 wt %, respectively, based on the total solid content of the components (A), (B) and (C).