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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 11596924 B1

PDFFull Text
Date of Patent:
Mar. 07, 2023

Filed:

Jun. 27, 2018

Nanoporous superabsorbent particles

Applicant:

Kimberly-clark Worldwide, Inc., Neenah, WI (US);

Inventors:

Vasily A. Topolkaraev, Appleton, WI (US);

Austin N. Pickett, Menasha, WI (US);

Karen Goeders, Alpharetta, GA (US);

Mark M. Mleziva, Appleton, WI (US);

Theodore T. Tower, Appleton, WI (US);

WanDuk Lee, Appleton, WI (US);

Neil T. Scholl, Neenah, WI (US);

Lori A. Eslinger, Appleton, WI (US);

Yuriy Galabura, New Rochelle, NY (US);

Dave Soerens, Neenah, WI (US);

Kazuhiro Takahashi, Kyoto, JP;

Yusuke Ueda, Kyoto, JP;

Megumi Tomioka, Kyoto, JP;

Assignee:

KIMBERLY-CLARK WORLDWIDE, INC., Neenah, WI (US);

Attorney:

Kimberly-Clark Worldwide, Inc.

Primary Examiner:

Andrew J Mensh

Int. Cl.
CPC ...
B01J 20/26 (2006.01); B01J 20/28 (2006.01);
U.S. Cl.
CPC ...
B01J 20/267 (2013.01); B01J 20/28004 (2013.01); B01J 20/2808 (2013.01); B01J 20/28016 (2013.01); B01J 20/28083 (2013.01); B01J 20/28085 (2013.01);
Abstract

Superabsorbent particles have a median size of from about 50 to about 2,000 micrometers and contain a porous network that includes a plurality of nanopores having an average cross-sectional dimension of from about 10 to about 500 nanometers, wherein the superabsorbent particles exhibit a Vortex Time of about 80 seconds or less and a free swell gel bed permeability (GBP) of 5 darcys or more, of 10 darcys or more, of 20 darcys or more, of 30 darcys or more, of 60 darcys or more, or of 90 darcys or more. A method for forming such superabsorbent particles includes forming a composition that contains a superabsorbent polymer and a solvent system; contacting the composition with a non-solvent system to initiate formation of the porous network through phase inversion; removing non-solvent from the composition; and surface crosslinking the superabsorbent particles.

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