MULTILAYER COATING FILM FORMING METHOD - NIPPON PAINT AUTOMOTIVE COATINGS CO LTD

Title:

MULTILAYER COATING FILM FORMING METHOD

Document Type and Number:

WIPO Patent Application WO/2020/241342

Kind Code:

A1

Abstract:

The objective of the invention is to provide a multilayer coating film forming method yielding excellent coating film smoothness. The multilayer coating film forming method comprises: an aqueous first coating composition coating step of coating an aqueous first coating composition (A) to form an uncured aqueous first coating film; an aqueous second coating composition coating step of coating an aqueous second coating composition (B) over the uncured aqueous first coating film to form an uncured aqueous second coating film; a clear coating step of coating a clear coating composition (C) over the uncured aqueous second coating film to form an uncured clear coating film; and a curing step of heat curing these coating films at once to form a multilayer coating film. In the multilayer coating film forming method, the aqueous first coating composition (A) contains a water dispersible polyurethane resin (a1) and a viscosity modifier (a2), and the aqueous second coating composition (B), when diluted to a coating viscosity, contains as diluting components excluding solids, water and an organic solvent.

Inventors:

SENDA AKIKO (JP)
TAKEMURA KENTA (JP)
ISHIDA SATOSHI (JP)

Application Number:

PCT/JP2020/019601

Publication Date:

December 03, 2020

Filing Date:

May 18, 2020

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NIPPON PAINT AUTOMOTIVE COATINGS CO LTD (JP)

International Classes:

B05D1/36; B05D3/00; B05D3/02; B05D7/24

Foreign References:

JP2013535311A	2013-09-12
JP2013000711A	2013-01-07
JP2014148642A	2014-08-21
JP2017170305A	2017-09-28
JP2018075552A	2018-05-17
JP2018183722A	2018-11-22
JP2013221041A	2013-10-28
JP2008543532A	2008-12-04
JP2003093965A	2003-04-02
JP2012116879A	2012-06-21
US201962854523P	2019-05-30
JP2019108195A	2019-07-04

Other References: