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:
Dec. 15, 1981
Filed:
Jun. 02, 1980
Norimasa Yoshida, Yokohama, JP;
Yasuo Ogawa, Kawasaki, JP;
Ryoji Handa, Yokosuka, JP;
Jun Hosoda, Yokohama, JP;
Nobuo Kurashige, Yokohama, JP;
Akihisa Furuno, Yokohama, JP;
Nitto Chemical Industry Co., Ltd., Tokyo, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Diafloc Co., Ltd., Tokyo, JP;
Abstract
In the production of a dried acrylamide polymer by polymerizing, in an aqueous medium, acrylamide alone or a monomer mixture comprising 50 mole % or more of acrylamide and at least one monomer copolymerizable therewith with a radical initiator, and then drying the resulting hydrous acrylamide polymer, the allowing of 2-mercaptobenzimidazole to be present in the drying step or a step prior thereto enables the dried acrylamide polymer having a high molecular weight and a good dissolvability in water to be obtained.