C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/643, 260/538
C07C 309/82 (2006.01) C07C 309/84 (2006.01) C07C 317/18 (2006.01) C07C 323/12 (2006.01) C07D 327/04 (2006.01) C08F 8/04 (2006.01) C08F 8/12 (2006.01) C08F 214/18 (2006.01) C08F 214/26 (2006.01) C08F 216/14 (2006.01) C08J 5/22 (2006.01)
Patent
CA 1168263
ABSTRACT Novel fluorinated vinylether compounds are provided, useful in the production of cation exchange membranes containing carboxylic acid groups and sulfonic acid groups, both in the form of a specific pendant struc- ture, the carboxylic acid groups being at least 20% on one surface of the membrane and gradually decreasing to- ward the innerside of the membrane, which membrane is use- ful in electrolysis of an aqueous alkali metal halide solu- tion with advantageously stable performance for a long term under more severe operational conditions than those conven- tionally used. Such a membrane is prepared from a copoly- mer of a fluorinated olefin with the novel sulfur contain- ing fluorinated vinylether which has the formula: Image h rein X' is -SR or -SO2R (R is C1 - C10 alkyl, an aryl, C1 - C10 perfluoroalkyl or chlorine), n is an integer of 2 to 4 and p' is an integer of 0 to 5.
432138
Ebisawa Mikio
Hane Toshioki
Kimoto Kyoji
Miyauchi Hirotsugu
Ohmura Jukichi
Asahi Kasei Kogyo Kabushiki Kaisha
Ridout & Maybee Llp
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