Patent ID: 7737213

Claim:
A resin composition for water paint comprising: the resin composition which includes water and a vinyl-modified epoxy ester resin (A), the resin (A) includes a fatty acid chain to which a vinyl polymer portion is combined, the vinyl polymer portion comprises a structure which includes a carboxyl group at the terminal end represented by general formula (I) (in the formula, n represents a number of 1 to 10, and R 1 represents an alkylene group having 2 to 18 carbon atoms), and part of or all of the structure which includes a carboxyl group at the terminal end represented by the general formula (I) is neutralized with a basic compound, the vinyl polymer portion of the vinyl-modified epoxy ester resin (A) also comprises a polyalkylene oxide structure represented by general formula (II) (in the general formula, m represents a number of 3 to 90, R 2 represents an alkylene group having 2 to 4 carbon atoms and R 3 represents a hydrogen atom or a methyl group).