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.:
Date of Patent:
Feb. 08, 2022
Filed:
Mar. 28, 2018
Applicant:
Sumitomo Seika Chemicals Co., Ltd., Hyogo, JP;
Inventors:
Assignee:
SUMITOMO SEIKA CHEMICALS CO., LTD., Hyogo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B01J 20/26 (2006.01); A61L 15/24 (2006.01); A61L 15/60 (2006.01); B01J 20/28 (2006.01); C08F 20/06 (2006.01);
U.S. Cl.
CPC ...
B01J 20/267 (2013.01); A61L 15/24 (2013.01); A61L 15/60 (2013.01); B01J 20/28026 (2013.01); C08F 20/06 (2013.01); C08F 2810/20 (2013.01);
Abstract
Disclosed are water-absorbent resin particles comprising a crosslinked polymer comprising a monomer unit derived from a water-soluble ethylenically unsaturated monomer, wherein an initial swelling force as measured according to a swelling force test conducted by a predetermined method is 8 N or more, and further, a ratio of the particles having a particle diameter of more than 250 μm and 850 μm or less is 70% by mass or more and a ratio of the particles having a particle diameter of 250 μm or less is 20% by mass or less, with respect to the total amount of the water-absorbent resin particles.