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:
Apr. 24, 1990
Filed:
Apr. 29, 1988
Applicant:
Inventors:
Yoshio Irie, Himeji, JP;
Kaoru Iwasaki, Himeji, JP;
Takumi Hatsuda, Himeji, JP;
Kazumasa Kimura, Osaka, JP;
Nobuyuki Harada, Suita, JP;
Kunihiko Ishizaki, Suita, JP;
Tadao Shimomura, Toyonaka, JP;
Teruaki Fujiwara, Himeji, JP;
Assignee:
Nippon Shokubai Kagaku Kogyo Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
528500 ; 528481 ; 528503 ; 526240 ; 5263077 ; 34 36 ;
Abstract
A method for the production of a hydrophilic polymer having a small residual monomer content from a hydrated gel polymer, which method comprises drying said hydrated gel polymer by contact thereof with a gas containing at least steam and having a dew point in the range of 50.degree. to 100.degree. C. at a temperature in the range of 80.degree. C. to 250.degree. C., and a hydrophilic polymer obtained therefrom.