METHOD FOR FORMING MULTILAYER COATING FILM, AND MULTILAYER COATING FILM

WIPO Patent Application WO/2023/238873

A1

The present invention is a method for forming a multilayer coating film, the method comprising: a step (1) for applying a water-based two-part first color paint (X) on an automobile outer panel to form a first uncured colored coating film; a step (2) for applying a water-based one-part white paint (Y-1) on the uncured first colored coating film to form an uncured white coating film; a step (3) for allowing the uncured white coating film to take four minutes or longer to set, to make the solid component of the coating film that has been formed account for 50 mass% or more; a step (4) for applying a water-based one-part interference-color paint (Y-2) on the uncured white coating film having a solid component content of 50 mass% or more, to form an uncured interference-colored coating film; a step (5) for applying a solvent-based two-part clear paint (Z) on the uncured interference-colored coating film, to form an uncured clear coating film; and a step (6) for simultaneously curing the coating films formed in steps (1) to (5) by heating at 75-100°C.

SATO SHINGO (JP)
YAMAZAKI MUTSUMI (JP)
IWARA YUKO (JP)
SUZUKI TATSUYA (JP)
TSUTSUI HIRONORI (JP)

PCT/JP2023/021048

December 14, 2023

June 06, 2023

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KANSAI PAINT CO LTD (JP)
NISSAN MOTOR (JP)

B05D1/36; B05D5/06; B05D7/14; B05D7/24; B32B7/023; B32B15/08; B32B27/00; B32B27/20; B32B27/26; B32B27/30

WO2021014859A1	2021-01-28
WO2018181193A1	2018-10-04

JP2004298837A	2004-10-28
JP2006095522A	2006-04-13
JP2007216220A	2007-08-30
JPH10137677A	1998-05-26
JP2002273321A	2002-09-24
JP2018171614A	2018-11-08

SAKAMOTO Tomohiro (JP)

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