Title:
METHOD FOR MANUFACTURING DOUBLE-LAYERED COATING FILM
Document Type and Number:
WIPO Patent Application WO/2023/203829
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a method which is for manufacturing a double-layered coating film and by which a double-layered coating film having a smooth appearance can be obtained even when wet-on-wet coating is performed by using an aqueous paint composition as an undercoat paint composition. A method for manufacturing a double-layered coating film according to the present disclosure comprises: an undercoat coating film forming step for coating an object to be coated with an undercoat paint composition to form an undercoat coating film; a topcoat coating film forming step for coating the undercoat coating film with a topcoat paint composition in a wet-on-wet manner to form a topcoat coating film; and a drying step for simultaneously drying the undercoat coating film and the topcoat coating film to form a double-layered coating film, wherein the undercoat paint composition is an aqueous paint composition containing an aqueous main agent (I) and an aqueous curing agent (II), the aqueous main agent (I) contains an aqueous dispersion of an epoxy resin (A), the aqueous curing agent (II) contains a polyamine compound (B), at least one among the aqueous main agent (I) and the aqueous curing agent (II) contains an organic solvent (C), and the polyamine compound (B) includes a polyamine compound (B1) having an active hydrogen equivalent of 100-200 g/eq and a polyamine compound (B2) having an active hydrogen equivalent of 300-900 g/eq.
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Inventors:
LIN CHUNSHUAN (JP)
FURUYAMA NAOKI (JP)
FURUYAMA NAOKI (JP)
Application Number:
PCT/JP2023/003358
Publication Date:
October 26, 2023
Filing Date:
February 02, 2023
Export Citation:
Assignee:
NIPPON PAINT IND COATINGS CO LTD (JP)
International Classes:
B05D1/36; B05D7/24; C09D5/00; C09D5/02; C09D163/00; C09D201/00
Domestic Patent References:
| WO2016067367A1 | 2016-05-06 | |||
| WO2017159740A1 | 2017-09-21 |
Foreign References:
| JP2018058917A | 2018-04-12 | |||
| JP2001279472A | 2001-10-10 | |||
| JP2010006884A | 2010-01-14 | |||
| JP2009254939A | 2009-11-05 |
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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