FLUORINE-CONTAINING POLYMER, CATION EXCHANGE MEMBRANE, AND ELECTROLYSIS VESSEL

Title:

FLUORINE-CONTAINING POLYMER, CATION EXCHANGE MEMBRANE, AND ELECTROLYSIS VESSEL

Document Type and Number:

WIPO Patent Application WO/2014/203886

Kind Code:

A1

Abstract:

The present invention relates to a cation exchange membrane including a fluorine-containing polymer which includes tetrafluoroethylene units, and perfluoroethylene units having carboxylic acid ion exchange groups. The melt index (a) of the fluorine-containing polymer obtained by methyl esterifying the carboxylic acid ion exchange groups, said melt index (a) being measured under conditions in which the temperature is 270˚C, the load is 2.16 kg, and the orifice internal diameter is 2.09 mm, is 3-50 g/10 min. Furthermore, the melt index (a), and the melt index (b) of the fluorine-containing polymer obtained by methyl esterifying the carboxylic acid ion exchange groups, said melt index (b) being measured under conditions in which the temperature is 260˚C, the load is 2.16 kg, and the orifice internal diameter is 2.09 mm, satisfy the relationship represented by formula (1), namely (a-b)/(270-260) ≤ 0.027×a+0.19.

Inventors:

KAIHARA SHINICHI (JP)
YONEZAWA MASAAKI (JP)
KONAGAYOSHI MASARU (JP)
SHINADA TOMOHIRO (JP)

Application Number:

PCT/JP2014/066005

Publication Date:

December 24, 2014

Filing Date:

June 17, 2014

Export Citation:

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Assignee:

ASAHI KASEI CHEMICALS CORP (JP)

International Classes:

C25B13/08; C08F8/14; C08F214/18; C08J5/22; C25B1/46; C25B9/19

Foreign References:

JP2007146173A	2007-06-14
JP2005060516A	2005-03-10
JP2004067880A	2004-03-04
US3546186A	1970-12-08
JP2002275672A	2002-09-25

Other References: