Water based paint compositions
AssigneeKansai Paint Co., Ltd.
InventorTakanobu Iizuka
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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.
Claims15
A process for forming multi-layered coating which comprises applying onto a metallic object a cationic electropaint, a water based paint composition water based intermediate coating and top coating, by the order stated, said water based paint composition comprising:
- (a) a polyurethane resin obtained by urethanation reaction of polyisocyanate compound with polyalkylene glycol and further reaction of so formed isocyanate-containing prepolymer with monohydric alcohol having at least 5 carbon atoms, and
- (b) water-soluable organic solvent having boiling point not higher than 150° C.
Dependencies are inferred from the claim text.