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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 11602577 B1

PDFFull Text
Date of Patent:
Mar. 14, 2023

Filed:

Mar. 28, 2017

Water-absorbing agent and method for producing same, and absorbent article produced using water-absorbing agent

Applicant:

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

Inventors:

Kazuki Kimura, Himeji, JP;

Nobuya Tanaka, Himeji, JP;

Yuki Tanaka, Himeji, JP;

Daisuke Takeda, Himeji, JP;

Assignee:

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

Attorney:

Harness Dickey & Pierce P.L.C.

Primary Examiner:

Joseph D Anthony

Int. Cl.
CPC ...
B01J 20/02 (2006.01); B01J 20/26 (2006.01); A61L 15/24 (2006.01); C08F 20/06 (2006.01); C08J 3/12 (2006.01); A61L 15/60 (2006.01); C08F 220/06 (2006.01); C08L 33/02 (2006.01); B29B 9/12 (2006.01); C08J 3/075 (2006.01); C08J 3/24 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); A61F 13/53 (2006.01);
U.S. Cl.
CPC ...
A61L 15/24 (2013.01); A61L 15/60 (2013.01); B01J 20/02 (2013.01); B01J 20/26 (2013.01); B01J 20/267 (2013.01); B01J 20/28004 (2013.01); B01J 20/28016 (2013.01); B01J 20/28045 (2013.01); B01J 20/28047 (2013.01); B01J 20/3021 (2013.01); B01J 20/3085 (2013.01); B29B 9/12 (2013.01); C08F 20/06 (2013.01); C08F 220/06 (2013.01); C08J 3/075 (2013.01); C08J 3/12 (2013.01); C08J 3/24 (2013.01); C08J 3/245 (2013.01); C08L 33/02 (2013.01); A61F 2013/530481 (2013.01); B01J 2220/68 (2013.01); B29B 2009/125 (2013.01); C08F 2810/20 (2013.01); C08J 2333/02 (2013.01);
Abstract

Provided is a water-absorbing agent having an excellent ability to absorb and retain liquid and an excellent liquid suction power. The water-absorbing agent contains a polyacrylic acid (salt)-based water-absorbing resin as a main component and satisfies all of the following physical properties (a) to (e): (a) a weight average particle diameter (D50) is 300 μm or more and less than 400 μm; (b) a proportion of particles with a particle diameter of 600 μm or more and less than 850 μm is less than 10 weight %; (c) an average gap radius is 100 μm or more and less than 180 μm; (d) a CRC is 28 g/g or more and less than 34 g/g; and (e) an AAP is 24 g/g or more.

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