Fluorinated vinyl ether compounds and process for producing the

Details Fluorinated vinyl ether compounds and process for producing the Fluorinated vinyl ether compounds and process for producing the

1981-09-03

1985-04-09

Daus, Donald G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfur containing

568 39, 568 45, 260543R, 260513F, 260465G, 204 98, C07C 4316

Patent

active

045103283

ABSTRACT:
A novel fluorinated cation exchange membrane containing carboxylic acid groups and sulfonic acid groups, both in the form of a specific pendant structure, the carboxylic acid groups being at least 20% on one surface of the membrane and gradually decreasing toward the innerside of the membrane, which membrane is useful in electrolysis of an aqueous alkali metal halide solution with advantageously stable performance for a long term under more severe operational conditions than those conventionally used. The membrane can be prepared from a novel copolymer of a fluorinated olefin with a novel sulfur containing fluorinated vinylether of the formula: ##STR1## wherein k is 0 or 1, l is an integer of 3 to 5, Z is --S-- or --SO.sub.2 -- and R is C.sub.1 -C.sub.10 alkyl, an aryl, Cl or C.sub.1 -C.sub.10 perfluoroalkyl.

REFERENCES:
patent: 4151053 (1979-04-01), Seko et al.
patent: 4176215 (1979-11-01), Molnar et al.
patent: 4178218 (1979-12-01), Seko
patent: 4357218 (1982-11-01), Seko

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