Patent US4029722A successfully refreshed from Google Patents.
US4029722A
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Polyfluoroalkyl glycol monoesters of orthophosphoric acid, and their salts and method of preparation
Assignee: Produits Chimiques Ugine Kuhlmann
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Filing: 1974-04-19
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Granted: 1977-06-14
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Expires: 1994-04-19
Abstract
Abstract New monoesters of phosphoric acid with polyfluorinated glycols having the formulas CnF2n+1CHYCH2-OP(O)(OH)2 <IMAGE> wherein Y is hydroxyl, can be prepared by alkaline saponification of the corresponding compounds wherein Y is chlorine. The new diacid monoesters and their salts are effective surfactants, unexpectedly stable in alkaline media.
Inventors
- 👤 Michel Demarcq
- 👤 Joseph Sleziona
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:49
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/091
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
14 words
Compounds of the formula ##STR15## wherein n is 2 to 18 and salts thereof.
Claim 2
Dependent Claim
14 words
Compounds of the formula ##STR15## wherein n is 2 to 18 and salts thereof.
Claim 3
Dependent Claim
10 words
The salts of the phosphoric acid monoesters of claim 1.
Claim 4
Dependent Claim
12 words
The alkali metal salts of the phosphoric acid monoesters of claim 1.
Claim 5
Dependent Claim
39 words
A process for the preparation of compounds of the formula ##STR16## wherein n is 2 to 18 which comprises hydrolyzing compounds of the formula ##STR17## or compounds of the formula ##STR18## in an aqueous alkaline medium followed by acidification.
Claim 6
Dependent Claim
39 words
A process for the preparation of compounds of the formula ##STR16## wherein n is 2 to 18 which comprises hydrolyzing compounds of the formula ##STR17## or compounds of the formula ##STR18## in an aqueous alkaline medium followed by acidification.
Claim 7
Dependent Claim
47 words
A process for the preparation of the phosphoric acid monoesters of claim 1 which comprises reacting the diacidic phosphoric acid or dichlorophosphoric acid monoester of the perfluoroalkylethylene chlorohydrins between C 2 and C 18 inclusive with a base at a temperature between -20° C and +200° C.
Claim 8
Dependent Claim
15 words
The process of claim 5 wherein the reaction is carried out in alkaline aqueous medium.
Claim 9
Dependent Claim
20 words
The process of claim 5 wherein the reaction is carried out in an aqueous solution of sodium or potassium hydroxide.
Claim 10
Dependent Claim
25 words
The process of claim 7 wherein the solution of the reaction product is evaporated to dryness without removal of the sodium or potassium chloride formed.
Claim 11
Dependent Claim
17 words
A process according to claim 5 in which the perfluoroalkylethylene chlorohydrin monoesters are diacidic phosphoric acid monoesters.
Claim 12
Dependent Claim
16 words
A process according to claim 5 in which the perfluoroalkylethylene chlorohydrin monoesters are dichlorophosphoric acid monoesters.
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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |