METHOD FOR FORMING MULTI-LAYERED COATING FILM

The present invention provides a method for forming a multilayer coating film, the method comprising (1) coating on a substrate an aqueous first colored coating composition containing a pigment and a hydroxy-containing polyester resin-containing film-forming resin having an acid value of 30 mg KOH/g...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KITAGAWA HIROSHI, KITAZONO KAZUAKI
Format:	Patent
Sprache:	eng
Schlagworte:	APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS PERFORMING OPERATIONS PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TRANSPORTING
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Beschreibung
Zusammenfassung:	The present invention provides a method for forming a multilayer coating film, the method comprising (1) coating on a substrate an aqueous first colored coating composition containing a pigment and a hydroxy-containing polyester resin-containing film-forming resin having an acid value of 30 mg KOH/g or less; (2) coating an aqueous second colored coating composition containing a film-forming resin and a copolymer obtained by copolymerization of monomer components containing a polymerizable unsaturated monomer having a hydrophilic group, and a macromonomer having a polymerizable unsaturated group and a backbone having a number average molecular weight of 1,000 to 10,000, obtained by polymerization of a monomer component having 5 to 100 mass % of a polymerizable unsaturated monomer having a C4-24 alkyl group; (3) coating a clear coating composition; and (4) simultaneously curing the three coating films formed in steps (1) to (3).