US4151200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing polyfluorodiacyl fluoride
Assignee: AGC Inc
•
Filing: 1977-10-25
•
Granted: 1979-04-24
•
Expires: 1997-10-25
Abstract
Abstract Polyfluorodiacyl fluorides having the formula FOC(CFXOCF.sub.2).sub.p (CF.sub.2).sub.n-1 (CF.sub.2 OCFX).sub.q COF wherein n represents an integer of 2 to 4; X represents fluorine or chlorine atom or trifluoromethyl group; p=0 to 5; q=0 to 5; p+q>1 are produced by reacting a perfluorolactone with a fluorocarbon epoxide, optionally in the presence of an aprotic polar solvent and a nucleophilic reagent.
Inventors
- 👤 Masaaki Yamabe
- 👤 Seisaku Kumai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:00
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C07C; C07C51/00; C07C51/58; C07D305/00; C07D305/02; C07D305/10; C07D305/12; C07D309/00; C07D309/16; C07D309/28; C07D309/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
A process for producing a polyfluorodiacyl fluoride having the formula FOC(CFXOCF.sub.2).sub.p (CF.sub.2).sub.n-1 (CF.sub.2 OCFX).sub.q COF wherein n represents an integer of 2 to 4; X represents fluorine or chlorine atom or trifluoromethyl group; p represents 0 to 5; q represents 0 to 5; and p+q is more than 1, which comprises reacting a perfluorolactone having the formula: ##STR13## wherein n represents an integer of 2 to 4; with a fluorocarbon epoxide having the formula ##STR14## wherein X represents fluorine or chlorine atom or trifluoromethyl group; wherein the reaction is carried out under spontaneous pressure or higher at the reaction temperature of -80° C. to +200° C.
Claim 2
Dependent Claim
106 words
A process for producing a polyfluorodiacyl fluoride having the formula FOC(CFXOCF.sub.2).sub.p (CF.sub.2).sub.n-1 (CF.sub.2 OCFX).sub.q COF wherein n represents an integer of 2 to 4; X represents fluorine or chlorine atom or trifluoromethyl group; p represents 0 to 5; q represents 0 to 5; and p+q is more than 1, which comprises reacting a perfluorolactone having the formula: ##STR13## wherein n represents an integer of 2 to 4; with a fluorocarbon epoxide having the formula ##STR14## wherein X represents fluorine or chlorine atom or trifluoromethyl group; wherein the reaction is carried out under spontaneous pressure or higher at the reaction temperature of -80° C. to +200° C.
Claim 3
Dependent Claim
15 words
A process according to claim 1 wherein the reaction is carried out in a solvent.
Claim 4
Dependent Claim
36 words
A process according to claim 2 wherein the solvent is an aliphatic polyether having carbon atoms of 4 to 16 or a hydrocarbon nitrile having carbon atoms of 2 to 12 or other aprotic polar solvent.
Claim 5
Dependent Claim
25 words
A process according to claim 2, wherein the solvent is ethyleneglycol dimethyl ether, diethyleneglycol dimethyl ether, dioxane, acetonitrile, propionitrile, dimethylformamide, dimethylsulfoxide, N-methylpyrrolidone, nitroethane, or tetrahydrofuran.
Claim 6
Dependent Claim
19 words
A process according to claim 1 wherein the reaction is carried out in the presence of a nucleophilic reagent.
Claim 7
Dependent Claim
20 words
A process according to claim 5 wherein the nucleophilic reagent is potassium fluoride, cesium fluoride, silver fluoride, quaternary ammonium fluoride.
Claim 8
Dependent Claim
22 words
A process according to claim 1 wherein a mole ratio of the fluorocarbon epoxide to the perfluorolactone is higher than stoichiometrical value.
Claim 9
Dependent Claim
35 words
A process for producing a polyfluorodiacyl fluoride having the formula ##STR15## wherein p represents 0 to 5; q represents 0 to 5; and p+q is more than 1, which comprises reacting perfluoro-γ-butyrolactone with hexafluoropropylene oxide.
Claim 10
Dependent Claim
35 words
A process for producing a polyfluorodiacyl fluoride having the formula ##STR15## wherein p represents 0 to 5; q represents 0 to 5; and p+q is more than 1, which comprises reacting perfluoro-γ-butyrolactone with hexafluoropropylene oxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |