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. 14, 2015
Filed:
May. 13, 2011
Applicants:
Yusuke Sato, Fukushima, JP;
Yusuke Fukushima, Fukushima, JP;
Yasuhito Nakata, Fukushima, JP;
Inventors:
Assignee:
Nitto Boseki Co., Ltd., Fukushima, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 75/20 (2006.01); C08G 75/00 (2006.01); C08G 75/22 (2006.01);
U.S. Cl.
CPC ...
C08G 75/00 (2013.01); C08G 75/22 (2013.01);
Abstract
Provided is a process for producing a copolymer of a diallylamine and sulfur dioxide which copolymer has a higher molecular weight and water-solubility than that obtained by a conventional production process by copolymerizing the diallylamine and sulfur dioxide in the presence of an acid and a radical polymerization initiator in a polar solvent.