VINYL ALCOHOL-BASED GRAFT POLYMER, METHOD FOR PRODUCING SAME, AND ION-EXCHANGE MEMBRANE USING SAME

WIPO Patent Application WO/2014/087981

A1

(1) Provided is a vinyl alcohol-based graft copolymer that contains a structural unit represented by general formula (I) and a vinyl alcohol-based structural unit, has a vinyl alcohol-based polymer containing a pendant mercapto group as the main chain, has a polymerizable unsaturated monomer grafted from this mercapto group, and has a controlled base point of graft polymerization. (In the formula, R1 is a hydrogen atom or a carboxyl group, R2 is a hydrogen atom, methyl group, carboxyl group, or carboxymethyl group, and X is a C1-C22 divalent group containing a carbon atom and a hydrogen atom and optionally containing a nitrogen atom and/or an oxygen atom.) (2) Provided is an ion-exchange membrane having suppressed swelling in water and excellent flex resistance, provided with a vinyl alcohol-based graft copolymer having the above-mentioned vinyl alcohol-based polymer containing a pendant mercapto group as a stem and having an ionic polymer chain grafted from the mercapto group.

KANESHIMA TAKUMA (JP)
AMANO YUSUKE (JP)
MORIKAWA KEISUKE (JP)

PCT/JP2013/082410

June 12, 2014

December 03, 2013

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KURARAY CO (JP)

C08F273/00; B01J47/12

WO2010119858A1	2010-10-21
WO2011073363A1	2011-06-23
WO2013105188A1	2013-07-18
WO2010119858A1	2010-10-21

JPH0616738A	1994-01-25
JP2011162637A	2011-08-25
JPS59189113A	1984-10-26
JPH09136924A	1997-05-27
JPS59189113A	1984-10-26
JP2006291161A	2006-10-26
JPH0616738A	1994-01-25
US3632826A	1972-01-04
JPS59187005A	1984-10-24

See also references of EP 2930193A4

SUGIMOTO, Shuji et al. (JP)
Shuji Sugimoto (JP)

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