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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.:

US 9908961 B1

PDFFull Text
Expired
Date of Patent:
Mar. 06, 2018

Filed:

Jun. 02, 2015

Vinyl alcohol-based graft polymer, method for producing same, and ion-exchange membrane using same

Applicant:

Kuraray Co., Ltd., Kurashiki-shi, JP;

Inventors:

Takuma Kaneshima, Kurashiki, JP;

Yusuke Amano, Kurashiki, JP;

Keisuke Morikawa, Kurashiki, JP;

Assignee:

KURARAY CO., LTD., Kurashiki-shi, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Mark Kaucher

Assistant Examiner:

Henry Hu

Int. Cl.
CPC ...
C08F 265/04 (2006.01); B01J 39/20 (2006.01); B01J 47/12 (2017.01); B01D 71/38 (2006.01); B01D 71/78 (2006.01); B01D 71/82 (2006.01); C08F 2/38 (2006.01); C08F 261/04 (2006.01); B01J 41/14 (2006.01);
U.S. Cl.
CPC ...
C08F 265/04 (2013.01); B01D 71/38 (2013.01); B01D 71/78 (2013.01); B01D 71/82 (2013.01); B01J 39/20 (2013.01); B01J 41/14 (2013.01); B01J 47/12 (2013.01); C08F 2/38 (2013.01); C08F 261/04 (2013.01); B01D 2323/38 (2013.01);
Abstract

Provided are (1) a vinyl alcohol graft copolymer grafting polymerizable unsaturated monomers as a graft chain onto a side-chain mercapto group-containing vinyl alcohol polymer backbone, the graft chain being attached to the polymer backbone at a mercapto group, and the backbone including: a vinyl alcohol unit and a unit represented by the following formula (I): wherein Ris a hydrogen atom or a carboxyl group; Ris a hydrogen atom, a methyl group, a carboxyl group, or a carboxymethyl group; and X is a divalent Cgroup which contains a carbon atom and a hydrogen atom and may contain a nitrogen atom and/or an oxygen atom; and (2) an ion-exchange membrane having controlled swelling in water and excellent flex resistance, the membrane including a vinyl alcohol graft copolymer as described above.

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Kaneshima, Takuma. (2018). Vinyl alcohol-based graft polymer, method for producing same, and ion-exchange membrane using same (U.S. Patent No. 9908961). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9908961

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