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:
Sep. 28, 1982
Filed:
Aug. 19, 1980
Applicant:
Inventors:
Tooru Yoshida, Yokohama, JP;
Seigo Iwagami, Tokyo, JP;
Takashi Ueshima, Yokohama, JP;
Yoshikazu Hosoda, Yokohama, JP;
Assignee:
Showa Denko Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ; C08F / ; C08F / ;
U.S. Cl.
CPC ...
525116 ; 521 31 ; 521 34 ; 525119 ; 526287 ; 526317 ; 526320 ; 5263231 ; 5263232 ;
Abstract
A highly water-absorbing but less water-soluble hydrogel is produced by polymerizing at least one hydrophilic ethylenically unsaturated monomer, e.g., ethylenically unsaturated carboxylic acid, ethylenically unsaturated sulfonic acid, or derivatives thereof, in the presence of a specific difunctional compound, e.g., polyethyleneglycol diglycidyl ether, polyethyleneglycol diacrylate, etc.