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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 10196500 B1

PDFFull Text
Date of Patent:
Feb. 05, 2019

Filed:

Aug. 27, 2013

Particulate water absorbing agent and process for producing same

Applicant:

Nippon Shokubai Co., Ltd., Osaka, JP;

Inventors:

Yasuhisa Nakashima, Himeji, JP;

Katsuyuki Wada, Himeji, JP;

Hiroyuki Ikeuchi, Himeji, JP;

Manabu Ueda, Himeji, JP;

Assignee:

NIPPON SHOKUBAI CO., LTD., Osaka, JP;

Attorney:

Dickinson Wright PLLC

Primary Examiner:

Joseph D Anthony

Int. Cl.
CPC ...
C08L 33/02 (2006.01); C08K 5/13 (2006.01); G01N 15/06 (2006.01); C02F 1/28 (2006.01); B01J 20/22 (2006.01); B01J 20/26 (2006.01); C08J 3/24 (2006.01); A61L 26/00 (2006.01); A61L 15/22 (2006.01); A61L 15/42 (2006.01); A61L 15/48 (2006.01); A61L 15/60 (2006.01); C08K 5/00 (2006.01); C08K 3/011 (2018.01);
U.S. Cl.
CPC ...
C08K 5/13 (2013.01); A61L 15/225 (2013.01); A61L 15/42 (2013.01); A61L 15/48 (2013.01); A61L 15/60 (2013.01); A61L 26/008 (2013.01); A61L 26/0014 (2013.01); A61L 26/0061 (2013.01); B01J 20/223 (2013.01); B01J 20/267 (2013.01); C02F 1/285 (2013.01); C08J 3/245 (2013.01); C08L 33/02 (2013.01); G01N 15/06 (2013.01); B01J 2220/445 (2013.01); C08J 2333/02 (2013.01); C08K 3/011 (2018.01); C08K 5/005 (2013.01); Y02W 10/37 (2015.05);
Abstract

The present invention (a) provides, at low cost, a water absorbing agent (i) that has a suppressed amount of generated dust and a suppressed amount of dust that increases over time and (ii) that also has a high absorption capacity without load, a high absorption capacity under load, a high vertical diffusion absorbency under load, and a high absorbency in a short period of time, and (b) also provides a method for evaluating, in a short period of time, an amount of dust that increases over time. A particulate water absorbing agent of the present invention includes: a surface crosslinked polyacrylic acid (salt)-based water absorbent resin as a main component; a hydrophilic polymer compound; and a stabilizing agent.

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