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:
Aug. 22, 2000
Filed:
Aug. 21, 1997
Nobuyuki Harada, Osaka, JP;
Koji Miyake, Hyogo, JP;
Yoshihiro Motono, Hyogo, JP;
Hideyuki Tahara, Osaka, JP;
Takumi Hatsuda, Hyogo, JP;
Teruyuki Kanto, Hyogo, JP;
Akito Yano, Hyogo, JP;
Yorimichi Dairoku, Hyogo, JP;
Kazuki Kimura, Hyogo, JP;
Yasuhiro Fujita, Hyogo, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
A method for the production of a water-absorbent resin capable of fast water absorption is disclosed which comprises the steps of dispersing bubbles of an inert gas in an aqueous monomer solution of a mixture of a water-soluble unsaturated monomer and a water-soluble cross-linking monomer and subjecting the mixture to copolymerization under the condition that a volume of the monomer solution wherein the inert gas is dispersed is in the range of 1.02 to 5 times of a volume of non-dispersant state.