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. 31, 2006
Filed:
Aug. 28, 2002
Yorimichi Dairoku, Hyogo, JP;
Kinya Nagasuna, Hyogo, JP;
Yoshihiko Masuda, Hyogo, JP;
Nobuyuki Harada, Osaka, JP;
Yoshihiro Motono, Hyogo, JP;
Kunihiko Ishizaki, Osaka, JP;
Yorimichi Dairoku, Hyogo, JP;
Kinya Nagasuna, Hyogo, JP;
Yoshihiko Masuda, Hyogo, JP;
Nobuyuki Harada, Osaka, JP;
Yoshihiro Motono, Hyogo, JP;
Kunihiko Ishizaki, Osaka, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
A method for the production of a water-absorbent agent comprises mixing an absorbent resin containing a carboxyl group with an additive soluble in the aqueous solution of at least one member selected from the group consisting of inorganic acids, organic acids, and polyamino acids and a cross-linking agent capable of reacting with the carboxyl group. A water-absorbent agent obtained by adding from 0.005 to 8 parts by weight of an epoxy compound to 100 parts by weight of a water-absorbent resin, exhibiting an absorption capacity without load of at least 45 (g/g), an absorption capacity under load of 20 g/cmof not less than 30 (ml/g) and having a residue amount of an epoxy compound of not more than 2 ppm. A water-absorbent composition comprises a polyamino acid (salt) and a water-absorbent resin containing a carboxyl group.