| 摘要 |
PURPOSE: To obtain a resin composition capable of forming electrodeposition coating film having stable, low-gloss and beautiful appearance and sufficient thickness and presenting excellent opacity and substrate die mark-hiding power. CONSTITUTION: This composition is obtained by incorporating 20-60 pts.wt. of an amino resin component in 40-80 pts.wt. of a copolymer component prepared by copolymerization of 10-60 pts.wt. of the mixed monomer component described below in the presence of 40-90 pts.wt. of a water-soluble or water- dispersible vinyl copolymer component bearing both carboxyl and hydroxyl groups on the side chain followed by blending the resultant system with 0.5-4.0 pts.wt. of a wax component. A total 100 pts.wt. of the mixed monomer component is composed of (a) such a pts.wt. of anα,β-ethylenic unsaturated carboxylic acid hydroxyalkyl-contg. ester monomer as to be >=20 in the hydroxyl value of the mixed monomer component, (b) 1-10 pts.wt. of anα,β-ethylenic unsaturated carboxylic alkoxysilane group-cont. ester monomer and (c) the rest of a copolymerizable vinyl group-contg. monomer free from carboxyl group.
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