Patent US4478760A successfully refreshed from Google Patents.
US4478760A
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Process for the preparation of fluorinated products
Assignee: Produits Chimiques Ugine Kuhlmann
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Filing: 1981-03-30
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Granted: 1984-10-23
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Expires: 2001-03-30
Abstract
Abstract The process for making a fluorinated product comprising reacting a perfluoroalkyl iodide and an olefin in the presence of a finely divided zinc and an acidic solvent.
Inventors
- 👤 Hubert Blancou
- 👤 Auguste Commeyras
- 👤 Robert Teissedre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:06
CPC Classifications
C; C07; C07C; C07C255/00; C07C17/00; C07C17/23; C07C253/00; C07C253/14; C07C51/00; C07C51/347; C07C51/363
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
151 words
A process for the preparation of fluorinated products having the formula: R.sub.F --CHR.sub.1 --CHR.sub.2 --y in which (a) R F represents a straight or branched perfluorinated chain C n F 2n+1 , with n being a whole number between 1 and 20; (b) y is selected from the hydroxy, carboxy, nitrile, halogen, ##STR9## thiol, thiocyanate, carbethoxy, acetoxy, CONH 2 , hydroxymethyl and acetoxymethyl groups; and (c) R 1 and R 2 are the same or different and are y, a hydrogen atom, an alkyl, cycloalkyl, phenyl, or alkylphenyl radical; consisting essentially of reacting a perfluoroalkyl iodide and a monoethylenic compound of the formula: CHR.sub.1 ═CR.sub.2 y in the presence of a finely divided zinc powder and an acidic solvent consisting of an organic, inorganic acid, or a mixture thereof with an organic solvent, at a temperature of from 20° to 100° C., and separating the fluorinated product from the reaction medium.
Claim 2
Dependent Claim
151 words
A process for the preparation of fluorinated products having the formula: R.sub.F --CHR.sub.1 --CHR.sub.2 --y in which (a) R F represents a straight or branched perfluorinated chain C n F 2n+1 , with n being a whole number between 1 and 20; (b) y is selected from the hydroxy, carboxy, nitrile, halogen, ##STR9## thiol, thiocyanate, carbethoxy, acetoxy, CONH 2 , hydroxymethyl and acetoxymethyl groups; and (c) R 1 and R 2 are the same or different and are y, a hydrogen atom, an alkyl, cycloalkyl, phenyl, or alkylphenyl radical; consisting essentially of reacting a perfluoroalkyl iodide and a monoethylenic compound of the formula: CHR.sub.1 ═CR.sub.2 y in the presence of a finely divided zinc powder and an acidic solvent consisting of an organic, inorganic acid, or a mixture thereof with an organic solvent, at a temperature of from 20° to 100° C., and separating the fluorinated product from the reaction medium.
Claim 3
Dependent Claim
28 words
The process of claim 1 wherein zinc is activated either by action of a strong inorganic acid or by formation of alloys with sodium, lead, mercury or copper.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein activated zinc is a Zn/Cu pair.
Claim 5
Dependent Claim
32 words
The process of claim 1, 2, or 3, in which zinc is used in an amount of from 5% to 50% in excess of the stoichiometric amount based on the perfluoroalkyl iodide.
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) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |