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:
Jun. 26, 2001
Filed:
Jun. 30, 1999
Kunihiko Ishizaki, Suita, JP;
Hisanobu Obara, Himeji, JP;
Nobuyuki Harada, Suita, JP;
Yoshihiro Motono, Himeji, JP;
Koji Miyake, Himeji, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
A water-absorbent resin is produced by dispersing a solid blowing agent having an average particle diameter within a range of from 1 &mgr;m to 100 &mgr;m in an aqueous monomer solution containing an unsaturated monomer and a cross-linking agent, and then polymerizing the unsaturated monomer. The water-absorbent resin has excellent water absorption characteristics, such as improved dispersion and absorption rate of aqueous fluid, enhanced water retention capacity and dry touch, lower water-soluble component content, and lower residual monomer content. When a water-absorbent resin composition using the water-absorbent resin is used for, for example, a sanitary material, it is possible to improve the absorption rate and water retention capacity, and prevent leakage of fluid from the sanitary material.