Fluorine containing vinyl ethers
DC
First Claim
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1. A process for the preparation of a perfluorinated vinyl ether of the formula CF2═
- CF—
O—
Rf wherein Rf is a linear, branched or cyclic perfluorinated aliphatic group that contains at least one oxygen atom, the process comprising the steps ofa) providing a hydrocarbon precursor comprising at least one 2-alkoxy propionate moiety, derivative or equivalent that may be partially halogenated;
b) fluorinating the hydrocarbon precursor to provide a perfluorinated intermediate; and
c) converting the perfluorinated intermediate to its corresponding perfluorinated acid metal salt, and d) converting the perfluorinated acid metal salt to its corresponding perfluorovinyl ether.
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Abstract
The present invention describes a novel process for the preparation of perfluorovinyl ethers. The process involves providing a hydrocarbon precursor that may be partially halogenated, fluorinating the precursor to provide a perfluorinated intermediate, and converting the perfluorinated intermediate to the desired perfluorinated ether. Novel perfluorovinyl ethers are also provided.
169 Citations
10 Claims
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1. A process for the preparation of a perfluorinated vinyl ether of the formula CF2═
- CF—
O—
Rf wherein Rf is a linear, branched or cyclic perfluorinated aliphatic group that contains at least one oxygen atom, the process comprising the steps ofa) providing a hydrocarbon precursor comprising at least one 2-alkoxy propionate moiety, derivative or equivalent that may be partially halogenated;
b) fluorinating the hydrocarbon precursor to provide a perfluorinated intermediate; and
c) converting the perfluorinated intermediate to its corresponding perfluorinated acid metal salt, and d) converting the perfluorinated acid metal salt to its corresponding perfluorovinyl ether. - View Dependent Claims (2, 3)
- CF—
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4. A process for the preparation of a perfluorinated vinyl ether of the formula CF2═
- CF—
O—
Rf wherein Rf is a linear, branched or cyclic perfluorinated aliphatic group that my contain oxygen atoms, the process comprising the steps ofa) providing a hydrocarbon precursor comprising at least one 2-alkoxy propionate moiety, derivative or equivalent that may be partially halogenated wherein the hydrocarbon precursor has the formula - View Dependent Claims (5, 6)
- CF—
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7. A perfluorovinyl ether having the formula RfOCF2OCF═
- CF2 wherein Rf is a linear, branched or cyclic perfluorinated aliphatic group that may contain oxygen atoms forming additional ether linkages and that does not contain any sites of terminal unsaturation.
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9. A perfluorovinyl ether according to claim 9 wherein Rf is —
- CF2CF3.
- View Dependent Claims (8)
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10. A process for the preparation of a perfluorinated vinyl ether of the formula CF2═
- CF—
O—
Rf wherein Rf is a linear, branched or cyclic perfluorinated aliphatic group that may contain oxygen atoms, the process comprising the steps ofa) providing a hydrocarbon precursor comprising at least one 2-alkoxy propionate moiety, derivative or equivalent that may be partially halogenated wherein the hydrocarbon precursor is selected from the group consisting of
- CF—
Specification
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Litigation Data
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Current Assignee3M Innovative Properties Company (3M Company)
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Original Assignee3M Innovative Properties Company (3M Company), Dyneon LLC (3M Company)
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InventorsWorm, Allan T., Hintzer, Klaus, Schwertfeger, Werner, Moore, George G. I., Qiu, Zai-Ming, Guerra, Miguel A., Hare, Erik D.
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Primary Examiner(s)Shaver, Paul F.
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Application NumberUS09/470,497Time in Patent Office559 DaysField of Search568/615, 568/616, 568/685US Class Current568/615CPC Class CodesC07C 2601/14 The ring being saturatedC07C 41/18 by reactions not forming et...C07C 41/24 by elimination of halogens,...C07C 41/48 Preparation of compounds ha...C07C 43/17 containing halogenC07C 43/192 containing halogenC07C 43/313 containing halogenC07C 67/307 by introduction of halogen;...C07C 69/708 Ethers
