C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
204/202, 402/319
C08J 5/22 (2006.01) 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)
Patent
CA 1185398
Abstract There is presented a novel fluorinated cation exchange membrane containing carboxylic acid groups and sulfonic acid groups, both in the form of a specific pendant structure, the car? ?ylic 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 and can be prepared from a novel copolymer of a fluori- nated olefin with a novel sulfur containing fluorinated vinyletter of the formula: CF2=CFO(CF2?FO)k(CF2)?-Z-R wherein k is 0 or 1, ? is an integer of 3 to 5, Z is -S- or -SO2- and R is C1 - C10 alkyl, an aryl, Cl or C1 - C10 perfluoroalkyl.
352671
Ebisawa Mikio
Hane Toshioki
Kimoto Kyoji
Miyauchi Hirotsugu
Ohmura Jukichi
Asahi Kasei Kogyo Kabushiki Kaisha
Ridout & Maybee Llp
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