AQUEOUS COATING COMPOSITION AND MULTILAYERED COATING FILM FORMATION METHOD

WIPO Patent Application WO/2021/187568

A1

Provided is an aqueous coating composition capable of forming a coating film having exceptional coating film appearance and little change in viscosity even when the amount of solvent the aqueous coating composition contains is reduced due to variation in the coating environment.　An aqueous coating composition containing a polyester resin dispersion (A) and a melamine resin (B), wherein the polyester resin that constitutes the polyester resin dispersion (A) contains an alkyd resin having an acrylic vinyl polymer segment, and the melamine resin (B) contains a hydrophobic melamine resin. As regards the viscosity of a dry coating film made from the coating composition, the coating film viscosity η1 when the solids content of the dry coating film is 60 mass% and the coating film viscosity η2 when the solids content of the dry coating film is 80 mass% are such that 1≦ η2/ η1≦10, the values for the coating film viscosity η1 and η2 being measured at a temperature of 25°C and a shear rate of 0.1 sec-1.

SEKINE KAZUKI (JP)
OHTONARI MASATOSHI (JP)

PCT/JP2021/011130

September 23, 2021

March 18, 2021

Click for automatic bibliography generation  

NIPPON PAINT AUTOMOTIVE COATINGS CO LTD (JP)

C09D167/00; B05D1/36; B05D7/24; C09D5/02; C09D133/00; C09D161/28; C09D175/04

WO2013151143A1

2013-10-10

JP2008144063A	2008-06-26
JP2010504401A	2010-02-12
JPH01129072A	1989-05-22
JP2010511775A	2010-04-15
JP2002542350A	2002-12-10
JP2002308993A	2002-10-23
JP2008302274A	2008-12-18
JP2006070095A	2006-03-16
JP2002012816A	2002-01-15
JPS4224192B1
JPS5541607B2	1980-10-25
JPS439076B1
JPS4841718B1	1973-12-07

See also references of EP 4122990A4

YAMAO, Norihito et al. (JP)

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