| abstract |
(57) [Summary] [Purpose] A new weather resistance that is inexpensive, can form a sufficient coating film by one-time coating, and that the coating film is beautiful and can be freely adjusted from matte to glossy. A resin composition for a cationic electrodeposition coating having improved stain resistance. [Structure] General formula (1) The molecular weight of the repeating unit represented by In the presence of the polysiloxane compound, 98 to 40% by weight of a mixed monomer of an amino group-containing polymerizable unsaturated monomer, a hydroxyl group-containing unsaturated acid monomer and a polymerizable unsaturated monomer is radically dissolved in a solvent. A resin composition for a cationic electrodeposition coating obtained by polymerizing, mixing a block isocyanate compound with this copolymer resin, neutralizing the resin with an acid, and then water-solubilizing the resin. |