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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 11958074 B1

PDFFull Text
Date of Patent:
Apr. 16, 2024

Filed:

Dec. 18, 2019

Method for forming a multilayer coating film

Applicants:

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

Nissan Motor Co., Ltd., Yokohama, JP;

Inventors:

Tatsuo Ohnuki, Hiratsuka, JP;

Kenichi Umezawa, Hiratsuka, JP;

Junpei Suzuki, Hiratsuka, JP;

Tomoyuki Okamoto, Atsugi, JP;

Chie Michiura, Atsugi, JP;

Takamitsu Ono, Atsugi, JP;

Yoshiaki Tomiyama, Atsugi, JP;

Assignees:

KANSAI PAINT CO., LTD, Amagasaki, JP;

NISSAN MOTOR CO., LTD., Yokohama, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Bret P Chen

Int. Cl.
CPC ...
B05D 7/26 (2006.01); B05D 7/00 (2006.01); B05D 7/02 (2006.01); B05D 7/14 (2006.01); C08F 212/08 (2006.01); C08F 220/14 (2006.01); C08F 220/18 (2006.01); C08F 220/56 (2006.01); C08G 18/62 (2006.01); C08G 18/77 (2006.01); C08G 18/79 (2006.01); C08K 3/013 (2018.01); C08K 3/36 (2006.01); C08K 9/06 (2006.01);
U.S. Cl.
CPC ...
B05D 7/572 (2013.01); B05D 7/02 (2013.01); B05D 7/14 (2013.01); C08F 212/08 (2013.01); C08F 220/14 (2013.01); C08F 220/1802 (2020.02); C08F 220/1804 (2020.02); C08F 220/56 (2013.01); C08G 18/6254 (2013.01); C08G 18/775 (2013.01); C08G 18/798 (2013.01); C08K 3/013 (2018.01); C08K 3/36 (2013.01); C08K 9/06 (2013.01); B05D 2201/02 (2013.01); B05D 2202/00 (2013.01); B05D 2401/20 (2013.01); B05D 2425/01 (2013.01); B05D 2425/02 (2013.01); B05D 2425/03 (2013.01); B05D 2451/00 (2013.01); B05D 2502/00 (2013.01); B05D 2503/00 (2013.01); B05D 2508/00 (2013.01); B05D 2601/22 (2013.01); C08K 2201/003 (2013.01); C08K 2201/011 (2013.01);
Abstract

A method includes a step of applying an aqueous 2-package type first colored paint to form an uncured first colored coating film; a step of applying an aqueous 1-package type second colored paint to form an uncured second colored coating film; a step of applying a solvent-based 2-package type clear paint to form an uncured clear coating film; and a step of heating the uncured first colored coating film, the uncured second colored coating film and the uncured clear coating film to 75 to 100° C. to simultaneously cure these films. The solvent-based 2-package type clear paint contains a hydroxyl group-containing acrylic resin and a polyisocyanate compound in a ratio of 1.5 to 2.0 equivalents of isocyanate groups in the polyisocyanate compound relative to 1 equivalent of hydroxyl groups in the hydroxyl group-containing acrylic resin.

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