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Patent Searching and Data


Title:
AQUEOUS COATING COMPOSITION AND MULTILAYERED COATING FILM FORMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/172550
Kind Code:
A1
Abstract:
The present invention provides an aqueous coating composition having little change in viscosity and capable of forming a coating film having an excellent coating film appearance even when the amount of solvent contained in the aqueous coating composition is reduced due to variations in the coating environment. The present invention provides an aqueous coating composition containing a polyurethane resin dispersion (A) and a melamine resin (B), wherein the melamine resin (B) contains a hydrophobic melamine resin, and the polyurethane resin that constitutes the polyurethane resin dispersion (A) has a viscosity measured at a temperature of 25°C and a shear rate of 0.1 sec-1 in the range of 101-150,000 Pa・s.

Inventors:
SEKINE KAZUKI (JP)
OHTONARI MASATOSHI (JP)
Application Number:
PCT/JP2021/007481
Publication Date:
September 02, 2021
Filing Date:
February 26, 2021
Export Citation:
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Assignee:
NIPPON PAINT AUTOMOTIVE COATINGS CO LTD (JP)
International Classes:
B05D3/02; B05D7/24; C09D5/00; C09D5/02; C09D161/28; C09D175/04; C09D175/06; C09D179/02
Domestic Patent References:
WO2020004386A12020-01-02
Foreign References:
JP2004290714A2004-10-21
JP2011122038A2011-06-23
JP2006169395A2006-06-29
JP2018171593A2018-11-08
JP2013053204A2013-03-21
JP2004097917A2004-04-02
JP2014148642A2014-08-21
JP2013535311A2013-09-12
JP2013000710A2013-01-07
JP2007056161A2007-03-08
JP2009505807A2009-02-12
JP2008302274A2008-12-18
JP2006070095A2006-03-16
US5906704A1999-05-25
JP2002012816A2002-01-15
Other References:
"Structural Study of Polyurethane Resin by NMR", JOURNAL OF THE TAKEDA RESEARCH LABORATORIES, vol. 34, no. 2, 1975, pages 224 - 323
See also references of EP 4112190A4
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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