Dispersion composition of fluorine-containing ion exchange resin

Patent metadata

Field	Value
Publication number	US-9468924-B2
Application number	US-201213713565-A
Country	US
Kind code	B2
Filing date	Dec 13, 2012
Priority date	Apr 9, 2008
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

The disclosure includes a method for producing a dispersion composition of fluorine-containing ion exchange resin comprising a copolymer represented by formula:

wherein x and y represent numbers satisfying 0≦x<1, 0≦y<1, and x+y=1; Z represents H, Cl, F, or a perfluoroalkyl group having 1 to 3 carbon atoms; m represents an integer of 0 to 12; and n represents an integer of 0 to 2.

First claim

The invention claimed is:

1. A method of producing a dispersion composition of fluorine-containing ion exchange resin comprising a copolymer represented by the following formula:

wherein
x and y represent numbers satisfying 0≦x<1, 0≦y<1, and x+y=1;
Z represents H, CI, F, or a perfluoroalkyl group having 1 to 3 carbon atoms;
m represents an integer of 0 to 12; and
n represents an integer of 0 to 2,

wherein an abundance ratio of a resin having a particle size of 10 μm or more in the fluorine-containing ion exchange resin is 0.1% to 48% by volume; and
a viscosity ηd (mPa·s) of the dispersion composition is within a range of formula (I): ηd≦exp (0.26×Cd) wherein Cd represents a concentration, mass %, of the fluorine-containing ion exchange resin,
the method comprising:
mixing 1% by mass or more and less than 15% by mass of the fluorine-containing ion exchange resin having an equivalent weight of from 400 to 1000 g/eq into a mixed solvent containing 50.1% to 99.9% by mass of water and 0.1% to 49.9% by mass of alcohol;
subjecting an aqueous composition comprising the fluorine-containing ion exchange resin to a dispersion treatment; and
concentrating the aqueous composition subjected to the dispersion treatment, so that the concentration Cd (mass %) of the fluorine-containing ion exchange resin becomes 20% by mass or more and 45% by mass or less.

2. The method for producing the dispersion composition according to claim 1 , wherein the alcohol is one or more of alcohols selected from the group consisting of methanol, ethanol, 1-propanol, and 2-propanol.

3. The method for producing the dispersion composition according to claim 1 , wherein the aqueous composition is subjected to the dispersion treatment at 220° C. or less.

4. The method for producing the dispersion composition according to claim 1 , wherein in the formula, n=0 and m=2.

5. The method for producing the dispersion composition according to claim 2 , wherein the aqueous composition is subjected to the dispersion treatment at 220° C. or less.

6. The method for producing the dispersion composition according to claim 2 , wherein in the formula, n=0 and m=2.

Assignees

• Asahi Kasei E Materials Corp

Inventors

• Murai Takahiko
• Kita Kohei
• Sakamoto Naoki

Classifications

• H01M8/1039

  halogenated, e.g. sulfonated polyvinylidene fluorides · CPC title

• C08J5/2237

  containing fluorine · CPC title

• Y02E60/521

  Cross-Sectional Technologies · mapped topic

• H01M8/1072

  by chemical reactions, e.g. in situ polymerisation or in situ crosslinking · CPC title

• H01B1/122

  Ionic conductors · CPC title