PURPOSE: To obtain a resin composition for antomotive repair coating material excellent in gloss, driability and build by mixing a specified modified vinyl copolymer as a base with optionally other specified components.
CONSTITUTION: The composition comprises 60-100 wt. % drying-oil-fatty-acid- modified vinyl copolymer, as a base, obtained by effecting the addition reaction of 100 pts.wt. epoxy vinyl copolymer obtained by copolymerizing 5-25wt.% epoxy vinyl monomer (e.g glycidyl methacrylate) with 0.1-10wt.% alkyd resin containing a copolymerizable unsaturation (e.g. Beckosol, a product of Dainippon Ink and chemicals Inc.) 1-60wt.% aromatic vinyl monomer (e.g. styrene) and 5-93.9 (the total being 100wt.%) vinyl monomer (e.g. methyl methacrylate) copolymerizable therewith with a drying oil fatty acid (e.g. linseed oil fatty acid) of an iodine value of 100-200, at most 40wt.% cellulose derivative, and at most 10wt.% ultraviolet absorber or drier and/or poly-isocyanate.
MARUYAMA KAZUYOSHI
TOKUNAGA KOJI
MURAKAMI YOICHI
YOKOYAMA YUKIO
