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Patent Searching and Data


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:
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Assignee:
NIPPON PAINT AUTOMOTIVE COATINGS CO LTD (JP)
International Classes:
B05D1/36; B05D3/00; B05D3/02; B05D7/24
Foreign References:
JP2013535311A2013-09-12
JP2013000711A2013-01-07
JP2014148642A2014-08-21
JP2017170305A2017-09-28
JP2018075552A2018-05-17
JP2018183722A2018-11-22
JP2013221041A2013-10-28
JP2008543532A2008-12-04
JP2003093965A2003-04-02
JP2012116879A2012-06-21
US201962854523P2019-05-30
JP2019108195A2019-07-04
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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