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:
Jun. 19, 1984
Filed:
Jun. 14, 1983
Applicant:
Inventors:
Ryoji Handa, Yokosuka, JP;
Jun Hosoda, Yokohama, JP;
Kenzo Ariyama, Yokohama, JP;
Osamu Okushima, Yokohama, JP;
Nobuo Kurashige, Yokohama, JP;
Assignees:
Nitto Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Diafloc Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; C08F / ;
U.S. Cl.
CPC ...
526208 ; 526214 ; 5263031 ;
Abstract
Acrylamide polymers having remarkably high molecular weights can be obtained by polymerizing acrylamide or a monomer mixture comprising a preponderant quantity of acrylamide in an aqueous medium with the use of a specific redox initiator and a specific azo compound initiator. The polymerization initiator used in this porcess comprises a combination of a persulfate, formaldehyde sodium sufoxylate and 2,2'-azobis-2-amidinopropane.