Aqueous resin composition for coating metal, and radically polymerizable macromonomer

Abstract

An aqueous resin composition for coating a metal, which can form a coating film having excellent water resistance and also having high hardness and excellent workability even after being subjected to a pressurized steam treatment is provided. The aqueous resin composition comprises (A) an aqueous copolymer obtained by neutralizing with a base carboxyl groups in a copolymer which is obtained by copolymerizing (a) a macromonomer which is a copolymer of N-alkoxymethyl (meth)acrylamide monomer units and other .alpha.,.beta.-ethylenically unsaturated monomer units, having a radically polymerizable group at one end thereof, (b) .alpha.,.beta.-ethylenically unsaturated carboxylic acid, (c) hydroxyalkyl (meth)acrylate, and (d) other .alpha.,.beta.-ethylenically unsaturated monomers, in specific proportions, and (B) an amino resin.

Dependencies are inferred from the claim text.