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:
Sep. 02, 2025
Filed:
Oct. 31, 2019
Sumitomo Seika Chemicals Co., Ltd., Hyogo, JP;
Sumitomo Seika Singapore Pte. Ltd., Singapore, SG;
Tetsuhiro Hinayama, Himeji, JP;
Sok Kiat Cheng, Singapore, SG;
SUMITOMO SEIKA CHEMICALS CO., LTD., Hyogo, JP;
SUMITOMO SEIKA SINGAPORE PTE. LTD., Singapore, SG;
Abstract
A water-absorbent resin that can reduce the amount of backflow of an absorbed liquid even when the water-absorbent resin is used at a low content in an absorbent material is provided. An absorbent article comprising an absorbent material containing the resin is also provided. The resin is a crosslinked polymer of a water-soluble ethylenically unsaturated monomer and has a dry-up index of 1.85 or more, as represented by equation (1):dry-up index=overall absorption capacity term α×water absorption rate term β (1)where the overall absorption capacity term α and the water absorption rate term β are determined according to equations (2) and (3): water absorption rate term β=dynamic water absorption rate/static water absorption rate (3).