Perfluorovinyloxy polyether carboxylic acid alkali metal salt and method for producing the same
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United States of America Patent
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Sep 19, 2017
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app pub date -
Dec 19, 2014
filing date -
Jan 10, 2014
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Abstract
A perfluorovinyloxy polyether carboxylic acid alkali metal salt represented by the general formula is provided:
wherein M is alkali metal, preferably sodium or potassium, a is an integer of 1 to 6, preferably 2, and b+c is an integer of 0 to 6, preferably 0 or 1. This perfluorovinyloxy polyether carboxylic acid alkali metal salt is produced by subjecting a perfluorovinyloxy polyether carboxylic acid alkyl ester represented by the general formula:
wherein R is an alkyl group having 1 to 12 carbon atoms, a is an integer of 1 to 6, and b+c is an integer of 0 to 6; to hydrolysis or solvolysis in the presence of an alkali metal hydroxide.
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