Process for preparing fluorohalogenethers

Details Process for preparing fluorohalogenethers Process for preparing fluorohalogenethers

2006-12-06

2009-11-03

Keys, Rosalynd (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S692000

Reexamination Certificate

active

07612242

ABSTRACT:
A process for preparing fluorovinylethers having general formula:in-line-formulae description="In-line Formulae" end="lead"?RfO—CF═CF2  (IA)in-line-formulae description="In-line Formulae" end="tail"?wherein Rfis a fluorinated or perfluorinated alkyl or cycloalkyl substituent; comprising the following reaction steps:1) reaction of a hypofluorite;2) dehalogenation or dehydrohalogenation of the fluorohalogenethers obtained in step 1) and obtainment of vinyl ethers;3) fluorination with fluorine of the vinyl ethers and obtainment of fluorohalogenethers; and4) dehydrohalogenation of the fluorohalogenethers and obtainment of the fluorovinylethers of formula (IV).The compounds of formula (IA) can be used, for example, in the preparation of various polymers, such as fluorinated elastomers and fluorinated thermoprocessable semicrystalline polymers.

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