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:
Oct. 03, 2017
Filed:
Dec. 08, 2014
Nippon Shokubai Co., Ltd., Osaka, JP;
Taishi Kobayashi, Hyogo, JP;
Motohiro Imura, Hyogo, JP;
Taku Iwamura, Hyogo, JP;
Katsuyuki Wada, Hyogo, JP;
Kozo Nogi, Hyogo, JP;
Yoshiro Mitsukami, Hyogo, JP;
Masato Abe, Hyogo, JP;
Hiroko Ueda, Hyogo, JP;
Koji Honda, Hyogo, JP;
NIPPON SHOKUBAI CO., LTD., Osaka, JP;
Abstract
A particulate water absorbing agent of the present invention is a water absorbing agent containing a water absorbing resin as a main component, the particulate water absorbing agent containing a polyvalent metal cation and satisfying: (1) the polyvalent metal cation is contained in an amount between 0.001 wt % and 5 wt % relative to the amount of the water absorbing agent; (2) an absorbency without pressure (CRC) is not less than 28 (g/g) and an absorbency against pressure (AAP 4.83 kPa) is not less than 10 (g/g); (3) the absorbency against pressure and the absorbency without pressure satisfy 77 ≦AAP (4.83 kPa)+1.8×CRC≦100; and (4) a moisture content of the water absorbing agent is between 5 wt % and 20 wt %. This provides a water absorbing agent which has blocking resistance after moisture absorption, is excellent in stability to shock and suppresses Re-Wet when used in a diaper.