US4153804A
Expired / Lapsed
US
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Process for producing fluorinated vinyl ether having ester group
Assignee: AGC Inc
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Filing: 1978-06-21
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Granted: 1979-05-08
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Expires: 1998-06-21
Abstract
Abstract A fluorinated vinyl ether having an ester group which has the formula CF.sub.2 ═ CFOCF.sub.2 (CF(CF.sub.3)OCF.sub.2).sub.n-1 (Rf).sub.m CO 2 R wherein n represents an integer of 1 to 5; m represents 0 or 1; Rf represents a C 1 -C 10 bifunctional perfluoro group and R represents an alkyl group, is produced by reacting fluorinated acyl fluoride having an ester group which has the formula FOC(CF(CF.sub.3)OCF.sub.2).sub.n (Rf).sub.m CO.sub.2 R with an alkali metal carbonate to produce an alkali metal salt of fluorinated carboxylic acid having an ester group which has the formula MOOC(CF(CF.sub.3)OCF.sub.2).sub.n (Rf).sub.m CO.sub.2 R wherein M represnts an alkali metal; And then, thermally decomposing the alkali metal salt of fluorinated carboxylic acid having an ester group.
Inventors
- 👤 Masaaki Yamabe
- 👤 Seiji Munekata
- 👤 Shunichi Samejima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:35
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/62; C07C69/65; C07C69/653
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
A process for producing a fluorinated vinyl ether having an ester group which has the formula CF.sub.2 ═CFOCF.sub.2 (CF(CF.sub.3)OCF.sub.2).sub.n-1 (Rf).sub.m CO.sub.2 R wherein n represents an integer of 1 to 5, m represents 0 or 1; Rf represents a C 1 -C 10 bifunctional perfluoro group and R represents an alkyl group which comprises reacting a fluorinated acyl fluoride having an ester group which has the formula FOC(CF(CF.sub.3)OCF.sub.2).sub.n (Rf).sub.m CO.sub.2 R with an alkali metal carbonate to produce an alkali metal salt of fluorinated carboxylic acid having an ester group which has the formula MOOC(CF(CF.sub.3)OCF.sub.2).sub.n (Rf).sub.m CO.sub.2 R wherein M represents an alkali metal, and then, pyrolyzing the alkali metal salt of fluorinated carboxylic acid having an ester group.
Claim 2
Dependent Claim
119 words
A process for producing a fluorinated vinyl ether having an ester group which has the formula CF.sub.2 ═CFOCF.sub.2 (CF(CF.sub.3)OCF.sub.2).sub.n-1 (Rf).sub.m CO.sub.2 R wherein n represents an integer of 1 to 5, m represents 0 or 1; Rf represents a C 1 -C 10 bifunctional perfluoro group and R represents an alkyl group which comprises reacting a fluorinated acyl fluoride having an ester group which has the formula FOC(CF(CF.sub.3)OCF.sub.2).sub.n (Rf).sub.m CO.sub.2 R with an alkali metal carbonate to produce an alkali metal salt of fluorinated carboxylic acid having an ester group which has the formula MOOC(CF(CF.sub.3)OCF.sub.2).sub.n (Rf).sub.m CO.sub.2 R wherein M represents an alkali metal, and then, pyrolyzing the alkali metal salt of fluorinated carboxylic acid having an ester group.
Claim 3
Dependent Claim
39 words
A process according to claim 1 wherein the reaction of the fluorinated acyl fluoride having an ester group with an alkali metal carbonate is carried out at a reaction temperature in a range of -30° C. to +160° C.
Claim 4
Dependent Claim
37 words
A process according to claim 1 wherein the thermal decomposition of the alkali metal salt of fluorinated carboxylic acid having an ester group is carried out at a temperature in a range of 100° to 350° C.
Claim 5
Dependent Claim
31 words
A process according to claim 1 wherein the reaction of the fluorinated acyl fluoride having an ester group with an alkali metal carbonate is carried out in an inert organic solvent.
Claim 6
Dependent Claim
31 words
A process according to claim 1 wherein the thermal decomposition of the alkali metal salt of fluorinated carboxylic acid having an ester group is carried out in a polar organic solvent.
Claim 7
Dependent Claim
68 words
A process according to claim 1 wherein the reaction of the fluorinated acyl fluoride having an ester group with an alkali metal carbonate is carried out at a temperature in a range of 10° to 130° C. and the thermal decomposition of the alkali metal salt of fluorinated carboxylic acid having an ester group is carried out at a temperature in a range of 140° to 300° C.
Claim 8
Dependent Claim
18 words
A fluorinated vinyl ether containing an ester group which has the formula CF.sub.2 ═CFOCF.sub.2 CF(CF.sub.3)O(CF.sub.2).sub.3 CO.sub.2 C.sub.2 H.sub.5.
Claim 9
Dependent Claim
18 words
A fluorinated vinyl ether containing an ester group which has the formula CF.sub.2 ═CFOCF.sub.2 CF(CF.sub.3)O(CF.sub.2).sub.3 CO.sub.2 C.sub.2 H.sub.5.
Claim 10
Dependent Claim
17 words
A fluorinated vinyl ether containing an ester group which has the formula CF.sub.2 ═CFOCF.sub.2 CF(CF.sub.3)O(CF.sub.2).sub.3 CO.sub.2 CH.sub.3.
Claim 11
Dependent Claim
17 words
A fluorinated vinyl ether containing an ester group which has the formula CF.sub.2 ═CFOCF.sub.2 CF(CF.sub.3)O(CF.sub.2).sub.3 CO.sub.2 CH.sub.3.
References Cited (Backward Citations)
US2839513A
Cited
US3250808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |