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:
Jul. 06, 2010
Filed:
Mar. 13, 2006
Kazushi Torii, Himeji, JP;
Kenji Kadonaga, Kakogawa, JP;
Hirofumi Shibata, Himeji, JP;
Taku Iwamura, Himeji, JP;
Kazuki Kimura, Himeji, JP;
Koji Miyake, Okayama, JP;
Kozo Nogi, Kakogawa, JP;
Kazushi Torii, Himeji, JP;
Kenji Kadonaga, Kakogawa, JP;
Hirofumi Shibata, Himeji, JP;
Taku Iwamura, Himeji, JP;
Kazuki Kimura, Himeji, JP;
Koji Miyake, Okayama, JP;
Kozo Nogi, Kakogawa, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
A water-absorbing agent according to the present invention includes water-absorbent resin particles having an internal cross-linked structure, wherein a vicinity of a surface of the water-absorbent resin particle is cross-linked with a surface cross-linking agent, and the water-absorbent resin particle has therein a sea-island structure having (i) part containing a first water-soluble multivalent metal salt such as aluminum sulfate and (ii) part not containing the first water-soluble multivalent metal salt. With this arrangement, it is possible to provide a water-absorbing agent having less water-soluble component content, more excellent liquid permeability, and more excellent water retention under pressure than the conventional water-absorbing agent.