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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 10654754 B1

PDFFull Text
Date of Patent:
May. 19, 2020

Filed:

Dec. 07, 2016

Gypsum composition for dry-curing coating material, gypsum-based coating material, and construction method for gypsum-based coating material

Applicant:

Yoshino Gypsum Co., Ltd., Tokyo, JP;

Inventors:

Itaru Yokoyama, Tokyo, JP;

Yoshikazu Tanaka, Tokyo, JP;

Assignee:

YUSHINO GYPSUM CO., LTD., Tokyo, JP;

Attorney:

Hamre, Schumann, Mueller & Larson, P.C.

Primary Examiner:

Anthony J Green

Int. Cl.
CPC ...
C04B 28/14 (2006.01); C04B 40/06 (2006.01); E04F 13/02 (2006.01); C04B 24/06 (2006.01); C04B 24/10 (2006.01); C04B 24/14 (2006.01); C04B 24/38 (2006.01); C04B 14/28 (2006.01); C04B 41/65 (2006.01); C04B 24/12 (2006.01); C04B 111/00 (2006.01); C04B 103/22 (2006.01); C04B 111/34 (2006.01);
U.S. Cl.
CPC ...
C04B 28/14 (2013.01); C04B 14/28 (2013.01); C04B 24/06 (2013.01); C04B 24/10 (2013.01); C04B 24/123 (2013.01); C04B 24/14 (2013.01); C04B 24/38 (2013.01); C04B 28/145 (2013.01); C04B 40/0608 (2013.01); C04B 41/65 (2013.01); E04F 13/02 (2013.01); C04B 2103/22 (2013.01); C04B 2111/0062 (2013.01); C04B 2111/00068 (2013.01); C04B 2111/00086 (2013.01); C04B 2111/00189 (2013.01); C04B 2111/00482 (2013.01); C04B 2111/00517 (2013.01); C04B 2111/00689 (2013.01); C04B 2111/34 (2013.01);
Abstract

There is provided a gypsum composition for a drying type coating material, the gypsum composition, when made into a gypsum-based coating material by addition of water, capable of forming a coating film in which color unevenness is suppressed even though the coating film is thin and smooth. This gypsum composition for a drying type coating material contains hemihydrate gypsum having a mean particle diameter of 50 μm or less, calcium carbonate having a mean particle diameter of 50 μm or less, and a setting retarder, wherein the gypsum composition has a content of calcium carbonate of 100 to 400 parts by mass and a content of the setting retarder of 0.1 parts by mass or more each based on 100 parts by mass of the hemihydrate gypsum.

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