METHOD FOR FORMING MULTI-LAYER COATING FILM

Title:

METHOD FOR FORMING MULTI-LAYER COATING FILM

Document Type and Number:

WIPO Patent Application WO/2020/153057

Kind Code:

A1

Abstract:

This method for forming a multi-layer coating film comprises: a step (1) for coating an aqueous two-component first coloring coating material (X) and forming an uncured first colored coating film; a step (2) for coating an aqueous one-component second coloring coating material (Y) and forming an uncured second colored coating film; a step (3) for coating a solvent-based two-component clear coating material (Z) and forming an uncured clear coating film; and a step (4) for heating and simultaneously curing the uncured first colored coating film, the uncured second colored coating film, and the uncured clear coating film to 75-100°C, wherein the solvent-based two-component clear coating material (Z) contains a hydroxyl group-containing acrylic resin (Z1) and a polyisocyanate compound (Z2) such that isocyanate groups in the polyisocyanate compound (Z2) are contained at a ratio of 1.5-2.0 equivalents with respect to 1 equivalent of hydroxyl groups in the hydroxyl group-containing acrylic resin (Z1).

Inventors:

OHNUKI TATSUO (JP)
UMEZAWA KENICHI (JP)
SUZUKI JUNPEI (JP)
OKAMOTO TOMOYUKI (JP)
MICHIURA CHIE (JP)
ONO TAKAMITSU (JP)
TOMIYAMA YOSHIAKI (JP)

Application Number:

PCT/JP2019/049621

Publication Date:

July 30, 2020

Filing Date:

December 18, 2019

Export Citation:

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Assignee:

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

International Classes:

B05D1/36; B05D3/00; B05D3/02; B05D7/00; B05D7/14; B05D7/24; C09D7/62; C09D175/04

Domestic Patent References:

WO2008050778A1	2008-05-02
WO2014045657A1	2014-03-27

Foreign References:

JP2014169434A	2014-09-18
JP2013053305A	2013-03-21
JP2013212482A	2013-10-17
JP2005042001A	2005-02-17
JP2013543041A	2013-11-28
JP2014014763A	2014-01-30
JPS6174682A	1986-04-16
JP2011131135A	2011-07-07

Other References: