WATER-BASED COATING COMPOSITION FOR INNER SURFACE OF CAN AND METHOD OF COATING INNER SURFACE OF CAN

摘要

A water-based coating composition for the inner surface of cans which comprises an aqueous medium and dispersed therein an acrylic-modified polyester resin (C) obtained by graft-polymerizing one or more polymerizable unsaturated vinyl monomers (B) comprising a carboxylated polymerizable unsaturated monomer with a polyester resin (A) having a number-average molecular weight of 2,000 to 100,000 and a hydroxyl value of 10 to 120 mg-KOH/g and containing ethylenically unsaturated double bonds, the resin (C) being in a neutralized form, and which further contains a resol resin crosslinking agent (D) in an amount of 1 to 40 parts by weight per 100 parts by weight of the acrylic-modified polyester resin (C); and a method of coating the inner surface of a can with the water-based coating composition.