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:
Feb. 27, 2007
Filed:
Jan. 27, 2004
Takumi Hatsuda, Takasago, JP;
Yoshio Irie, Himeji, JP;
Masatoshi Nakamura, Himeji, JP;
Katsuyuki Wada, Himeji, JP;
Shinichi Fujino, Himeji, JP;
Kazuki Kimura, Himeji, JP;
Kunihiko Ishizaki, Suita, JP;
Takumi Hatsuda, Takasago, JP;
Yoshio Irie, Himeji, JP;
Masatoshi Nakamura, Himeji, JP;
Katsuyuki Wada, Himeji, JP;
Shinichi Fujino, Himeji, JP;
Kazuki Kimura, Himeji, JP;
Kunihiko Ishizaki, Suita, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
In a production process for a water-absorbent resin, comprising the steps of: blending a liquid material and a water-absorbent resin; and heating the resultant mixture in order to produce a modified water-absorbent resin, the present invention is to provide: a method for uniformly and efficiently treating a water-absorbent resin favorably in view of industry, and as a result, a good-balanced water-absorbent resin having various excellent properties, such absorption capacity without a load, absorption capacity under a load, and single-layer absorption capacity under a load in contact with an aqueous liquid. The production process comprises the step of spray-blending a water-absorbent resin (A) and a liquid material (B) with a blending apparatus equipped with a spray nozzle (C), wherein the liquid material (B) is sprayed from the spray nozzle (C) and its spray pattern is a circular and hollow cone shape or a double-convex-lens and elliptic cone shape. In addition, the production process comprises the step of heat-treating a water-absorbent resin under an atmosphere having a dew point of not higher than 60° C. and a temperature of not lower than 90° C., wherein the water-absorbent resin is obtained after a drying step following a pulverization step.