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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 10639672 B1

PDFFull Text
Date of Patent:
May. 05, 2020

Filed:

Dec. 10, 2015

Method for forming multilayer coating film

Applicant:

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

Inventors:

Daisuke Takayama, Kanagawa, JP;

Hironori Tonomura, Kanagawa, JP;

Naoto Matsushima, Kanagawa, JP;

Shuichi Nakahara, Kanagawa, JP;

Assignee:

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

Attorney:

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

Primary Examiner:

William P Fletcher, III

Int. Cl.
CPC ...
B05D 7/14 (2006.01); B32B 27/18 (2006.01); B05D 7/24 (2006.01); B05D 7/00 (2006.01); B05D 5/06 (2006.01); B05D 1/36 (2006.01);
U.S. Cl.
CPC ...
B05D 7/572 (2013.01); B05D 1/36 (2013.01); B05D 5/068 (2013.01); B05D 7/14 (2013.01); B05D 7/24 (2013.01); B32B 27/18 (2013.01); B05D 2202/10 (2013.01); B05D 2451/00 (2013.01);
Abstract

The problem to be solved by the present invention is to provide a method for forming a multilayer coating film using a 3-coat 1-bake process, the method comprising sequentially applying an aqueous first colored coating composition, an aqueous second colored coating composition, and a clear coating composition to a substrate and simultaneously heat-curing the resulting three layers to form a multilayer coating film having an excellent finished appearance, such as smoothness and distinctness of image, as well as metallic feel and no metallic mottling when the composition comprises an effect pigment, and exhibiting excellent coating film performance, such as water resistance. The present invention provides a method for forming a multilayer coating film by a 3-coat 1-bake process comprising sequentially applying an aqueous first colored coating composition, an aqueous second colored coating composition, and a clear coating composition to a substrate, and simultaneously heat-curing the resulting three layers to form a multilayer coating film, wherein the aqueous second colored coating composition contains (A) a film-forming resin and (B) a phosphoric acid compound represented by a specific formula.

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