Abstract: This invention provides a water based paint composition containing polyurethane resin which is formed by urethanation reaction of polyisocyanate compound with polyalkylene glycol and a further reaction of so formed isocyanate-containing prepolymer with a monohydric alcohol having at least 5 carbons, and water-soluble organic solvent having boiling point not higher than 150° C.; and provides also a process for forming multi-layered coating, which comprises applying onto a metallic object cationic electropaint, above-described water based paint composition, water based intermediate coating and top coating, by the order stated.

Abstract: This invention provides a water based paint composition containing polyurethane resin which is formed by urethanation reaction of polyisocyanate compound with polyalkylene glycol and a further reaction of so formed isocyanate-containing prepolymer with a monohydric alcohol having at least 5 carbons, and water-soluble organic solvent having boiling point not higher than 150° C.; and provides also a process for forming multi-layered coating, which comprises applying onto a metallic object cationic electropaint, above-described water based paint composition, water based intermediate coating and top coating, by the order stated.

Abstract: The present invention provides a repair coating process, the repair coating process consisting of grinding the part of an intermediate coating surface to be repaired and then performing a repair coating of the ground part with a thermo-curable organic solvent type repair paint (F) containing a neutralized product of a hydroxyl group-containing resin having an acid value of 5-100 mgKOH/g and a crosslinking agent in forming multilayer coating films by coating an electro-deposition paint (A) and an intermediate paint (B) and curing them by heating, then, after performing a repair coating on the intermediate coating surface, successively coating wet-on-wet a white water base coat (C), a pearly base coat (D), and a clear coat (E), and then curing by crosslinking the films of the above-mentioned coats (C), (D), and (E) simultaneously through heating.

Abstract: The present invention is to provide a repair coating process, which does not require heating the coating film coated to repair the part, from which dust, seediness etc.

Abstract: The present invention is to provide a repair coating process, the repair coating process consists of grinding the part of an intermediate coating surface to be repaired and then performing a repair coating of the ground part with a thermocurable organic solvent type repair paint (F) containing a neutralized product of a hydroxyl group-containing resin having an acid value of 5-100 mgKOH/g and a crosslinking agent in forming multilayer coating films by coating an electro-deposition paint (A) and an intermediate paint (B) and curing them by heating, then, after performing a repair coating on the intermediate coating surface, successively coating wet-on-wet a white type water base coat (C) a pearly base coat (D) and a clear coat (E), and then curing by crosslinking the films of the above-mentioned coats (C), (D) and (E) simultaneously through heating.