- Process for producing fluorinated vinyl ether
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There is provided a process for producing a fluorinated vinyl ether from a fluorinated acid fluoride compound having an ester group as a precursor of a carboxylic acid group, or a SO2F group as a precursor of a sulfonic acid group, in high yield by simple operations. Said process is a production process comprising pyrolyzing a carboxylic acid potassium salt with a specific structure represented by the following formula in the absence of a solvent and/or while maintaining the salt in the solid state: wherein X is —CO2R or —SO2F, and R is an alkyl group.
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- Alkyl perfluoro-ω-fluoroformyl esters and monomers therefrom
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Alkyl perfluoro-ω-fluoroformyl esters are provided which have the formula STR1 wherein R is alkyl of 1-6 carbon atoms, and N IS 0-6 (PREFERABLY 0). Compounds where n is 0 are prepared by contacting SO3 with a compound of the formula Compounds where n is 1-6 are prepared by contacting a compound where n is 0 with hexafluoropropylene oxide. Also provided are polymerizable monomers having the formula STR2 wherein Y is --COOR, --COOH, --COOM or --CN, where M is an alkali metal, ammonium or quaternary ammonium and p is 1-5, prepared from alkyl perfluoro-ω-fluoroformyl esters of this invention.
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- Alkyl perfluoro-ω-fluoroformyl esters and their preparation
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Alkyl perfluoro-ω-fluoroformyl esters are provided which have the formula: STR1 wherein R is alkyl of 1-6 carbon atoms, and n is 0-6 (preferably 0). Compounds where n is 0 are prepared by contacting SO3 with a compound of the formula ROOC--CF2 --CF2 --OR1. Compounds where n is 1-6 are prepared by contacting a compound where n is 0 with hexafluoropropylene oxide.
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