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:
Mar. 21, 2023
Filed:
Nov. 14, 2018
Nippon Shokubai Co., Ltd., Osaka, JP;
Hiroki Kawada, Hyogo, JP;
Taku Iwamura, Hyogo, JP;
Koji Tachi, Hyogo, JP;
Makiko Masuda, Hyogo, JP;
Yasuhisa Nakashima, Hyogo, JP;
Kazushi Torii, Hyogo, JP;
Yukihiro Kasano, Hyogo, JP;
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Abstract
Provided is a water-absorbing agent that causes no or little fluctuation of feed rate when fed with use of a feeder. A water-absorbing agent containing a water-absorbing resin as a main component, the water-absorbing agent satisfying the following (a) and (b): (a) K-index is 70 or more; and (b) Moisture absorption blocking ratio, after 30 minutes of standing at a temperature of 25° C. and a relative humidity of 80% RH, is 70 weight % or less, the K-index being defined by the following equation: K-index=100−(−438+3.6×angle of repose+3.5×angle of difference+7.9×compressibility rate+290×bulk density (EDANA method)).