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. 20, 2013
Filed:
Jan. 20, 2006
Masazumi Sasabe, Kakogawa, JP;
Sumio Okuda, Ibo-gun, JP;
Yorimichi Dairoku, Himeji, JP;
Shuji Kanzaki, Himeji, JP;
Yoshihiro Kita, Himeji, JP;
Motohiro Imura, Akashi, JP;
Masazumi Sasabe, Kakogawa, JP;
Sumio Okuda, Ibo-gun, JP;
Yorimichi Dairoku, Himeji, JP;
Shuji Kanzaki, Himeji, JP;
Yoshihiro Kita, Himeji, JP;
Motohiro Imura, Akashi, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
A production method of a water-absorbent resin includes the steps of: obtaining a hydrogel by supplying monomer liquid to a reaction device so that the monomer liquid is polymerized; and detaching the hydrogel from the reaction device, wherein the reaction device's surface in contact with the monomer liquid at a position where polymerization occurs is made of a fluororesin having a melt viscosity of less than 1×10poise at 380° C. On this account, it is possible to obtain a water-absorbent resin having less amounts of an extractable content with high productivity and it is possible to carry out continuous production for an extended period of time.