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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11420226 B1

PDFFull Text
Date of Patent:
Aug. 23, 2022

Filed:

Apr. 11, 2017

Method for forming multilayer coating film

Applicant:

Kansai Paint Co., Ltd., Hyogo, JP;

Inventors:

Hirohisa Tsuda, Hyogo, JP;

Toshiki Takenaka, Hyogo, JP;

Michihiro Fujita, Hyogo, JP;

Hideaki Katsuta, Hyogo, JP;

Assignee:

KANSAI PAINT CO., LTD., Hyogo, JP;

Attorney:

Wenderoth, Lind & Ponack, L.L.P.

Primary Examiner:

Francisco W Tschen

Int. Cl.
CPC ...
B05D 1/36 (2006.01); B05D 7/00 (2006.01); B05D 1/02 (2006.01); C09D 5/00 (2006.01); E02F 9/00 (2006.01); C09D 133/00 (2006.01); C09D 163/00 (2006.01); C09D 133/04 (2006.01); C09D 175/16 (2006.01); C08G 18/62 (2006.01); C08G 18/48 (2006.01); C08G 18/79 (2006.01); C09D 5/08 (2006.01);
U.S. Cl.
CPC ...
B05D 1/36 (2013.01); B05D 7/542 (2013.01); C08G 18/4825 (2013.01); C08G 18/6229 (2013.01); C08G 18/792 (2013.01); C09D 5/00 (2013.01); C09D 133/00 (2013.01); C09D 133/04 (2013.01); C09D 163/00 (2013.01); C09D 175/16 (2013.01); E02F 9/00 (2013.01); B05D 1/02 (2013.01); B05D 2202/00 (2013.01); B05D 2503/00 (2013.01); B05D 2504/00 (2013.01); B05D 2601/02 (2013.01); C09D 5/084 (2013.01);
Abstract

An object achieved by the present invention is to provide a coated article having excellent appearance, corrosion resistance, weatherability, and chipping resistance obtained by a wet-on-wet coating. The present invention provides a method for forming a multilayer coating film comprising the steps of forming, on a substrate, an uncured coating film of a primer paint composition (A) containing an epoxy resin (a1) having a weight average molecular weight of 20000 or more and pigments, forming, on the uncured coating film, a top coating film of a top paint composition (B) containing an acrylic resin (b1) and the like, and simultaneously drying the films, wherein the uncured coating film of the primer paint composition (A) during application of the top paint composition (B) has a viscosity of 5 Pa·s to 1000 Pa·s, and the value ΔNV obtained by subtracting the value (NV1) of application mass solids content (%) of the primer paint composition (A) from the value (NV2) of mass solids content (%) of the uncured coating film of the primer paint composition (A) during the application of the top paint composition is 15 or more.

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