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:
Jan. 21, 2025
Filed:
Nov. 07, 2019
Nippon Shokubai Co., Ltd., Osaka, JP;
Takaaki Wada, Himeji, JP;
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Abstract
Provided is a method for producing a particulate water-absorbing agent that can reduce a re-wet amount of an absorbent body when applied to the absorbent body. The method for producing the particulate water-absorbing agent according to an aspect of the present invention includes the step of surface-crosslinking a water-absorbing resin powder with use of a surface-crosslinking agent, wherein the water-absorbing resin powder has a specific surface area index, expressed by formula (1) below, of not less than 1.5, and the surface-crosslinking agent has an apparent Hansen solubility parameter of 22.5 MPato 28.5 MPa:(specific surface area index)=(specific surface area of water-absorbing resin powder)/(1050) (1),