To obtain a coating material which can effectively hide a die mark on light metal by adding an organic solvent containing a specified amount of an organic solvent being capable of promoting the dissolution of a water-soluble resin in water and having a specified boiling point and a specified water solubility to a coating composition comprising an anionic water-soluble resin, a crosslinking resin and additives.
This material essentially consists of an anionic watersoluble resin, a crosslinking resin and additives, is freed from acetone insolubles and can be filtered with a 0.4μm filter. The solvent which can be sued in this material is one containing at least 1/3 of the entire organic solvent, organic solvent having a boiling point of 140-200°C and a water solubility of 10 or below and exemplified by propylene glycol n-butyl ether or 2-ethylhexanol. The water-soluble resin used is an acrylic resin having carboxyl or hydroxyl groups as side chains. The crosslinking resin is desirably an amino resin, and the additives used are a chelate compound, etc.
OGURI HIROYUKI
SAITO HIROSHI
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