Carboxilico fluorinated acid or its derivative, process for production of carboxilico fluorinated acid or its derivative, fluorinated acid fluoride and process is the same.Composed of fluorinated vinyl ether compound and process of preparation of fluorinated.Copolimero fluorinated and process of production of copolimero fluorinated and process for the production of a membrane switch cationica fluoro

摘要

A novel fluorinated copolymer is prepared by copolymerization of a fluorinated olefin with a novel sulfur containing fluorinated vinyl ether of the formula: IMAGE wherein k is 0 or 1 and l is an integer of 3 to 5, which is prepared from starting materials which are also novel. Said copolymer is useful for preparation of a fluorinated cation exchange membrane having carboxylic acid groups and/or sulfonic acid groups which can be used advantageously in electrolysis of an aqueous alkali metal halide solution with improved electrolysis performance.