| 摘要 |
PROBLEM TO BE SOLVED: To provide a vinyl-modified epoxy resin aqueous product having high initial hardness of a coating film and excellent corrosion and solvent resistance and overcoatability, and an aqueous coating agent comprising the epoxy resin aqueous product. SOLUTION: The vinyl-modified epoxy resin aqueous product is produced by copolymerizing a modified epoxy resin (1) containing a polymerizable unsaturated group, which is produced by reacting an epoxy-containing fatty acid-modified epoxy ester (1a), a glycidyl-containing vinyl monomer (1b) and an amine (1c), with a carboxyl-containing vinyl monomer (2) to form a copolymer (A) and neutralizing the copolymer (A) with a basic compound to disperse or dissolve in water. COPYRIGHT: (C)2007,JPO&INPIT
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