Fluorinated cation exchange membrane and use thereof in electrolysis of alkali metal halide

Patent 4126588 Issued on November 21, 1978. Estimated Expiration Date:

December 28, 1996. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3546186

3635926

3642792

Diaphragm cell having uniform and minimum spacing between the anodes and cathodes Patent #: 3960697
Issued on: 06/01/1976
Inventor: Kircher , et al.

Inventors

Assignee

Asahi Glass Company Ltd.

Application

No. 05/755068 filed on 12/28/1976

US Classes:

521/31, Solid polymer derived from ethylenically unsaturated reactant only204/296Organic

Examiners

Primary: Schofer, Joseph L.
Assistant: Kulkosky, Peter F.

Attorney, Agent or Firm

Oblon, Fisher, Spivak, McClelland & Maier

International Classes

C08F 8/12 (20060101)
C08F 8/00 (20060101)
C08J 5/20 (20060101)
C08J 5/22 (20060101)

Foreign Application Priority Data

1975-12-30 JP

Abstract

A fluorinated cation exchange membrane is made of three component copolymer produced by copolymerizing a fluorovinylpolyether having the formula Iwherein ଱ is 0 to 3; ଲ is 0 to 6; γ is 0 to 4 and either ଱ or γ is not 0; X, X' and X" respectively represent --F or a C1-5 perfluoroalkyl group; A represents --CN--, --COF, --COOH, --COOR1, --COOM or --CONR2 R3 ; R1 represents a C1-10 alkyl group preferably a C1-3 alkyl group, R2 and R3 respectively represents hydrogen atom or a C1-10 alkyl group; and M represents an alkali metal atom or a quaternary ammonium group, a fluorovinyl compound having the formula IIwherein δ is 0 to 1; γ is 1 to 6; Y represents --F or a C1-5 perfluoroalkyl group; A is defined in the formula I and a fluorinated olefin having the formula IIIwherein Z and Z' respectively represent --H, --Cl, --F or --CF3, and if necessary hydrolyzing the copolymer.