US4154753A
Expired / Lapsed
US
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Fluorinated compounds containing functional groups
Assignee: Imperial Chemical Industries Ltd
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Filing: 1972-01-03
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Granted: 1979-05-15
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Expires: 1992-01-03
Abstract
Abstract Surface-active products containing a highly fluorinated aliphatic substituent are prepared by nucleophilic attack of an oligomer of tetrafluoroethylene with an organic hydroxy compound in association with a proton acceptor.
Inventors
- 👤 Harold C. Fielding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:03
CPC Classifications
C; C07; C07C; C07C309/00; C07B; C07B41/00; C07B41/04; C07C213/00; C07C213/06; C07C41/00; C07C41/01; C07C41/05; C07C41/06; C07C41/16; C07C43/00; C07C43/02; C07C43/03; C07C43/14; C07C43/17; C07C43/20; C07C43/225; C07C67/00; C07C67/30; C07C67/333; C07C67/343; C07C69/00; C07C69/62; C07C69/65; C08; C08G; C08G65/00; C08G65/002; C08G65/005; C08G65/007; C08G65/02; C08G65/32; C08G65/329; C08G65/337
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A surface-active compound having a structure R f (OR) x wherein R f is a radical C 2n F 4n-x is which n is an integer equal to 4, 5 or 6 and x is an integer equal to 1 or 2 and said radical being a branched-chain, internally unsaturated perfluoroolefin which is a tetrafluoroethylene oligomer C 2n F 4n minus x fluorine atoms, and wherein R f is attached by an ether linkage to another organic radical R, and ether linkage being through the hydroxyl group minus the hydrogen atom of the hydroxyl group, wherein the organic radical R contains a hydrophilic group and said hydrophilic group is selected from the group consisting of an oxyalkylene chain, a carboxylate salt or a sulphonate salt.
Claim 2
Dependent Claim
125 words
A surface-active compound having a structure R f (OR) x wherein R f is a radical C 2n F 4n-x is which n is an integer equal to 4, 5 or 6 and x is an integer equal to 1 or 2 and said radical being a branched-chain, internally unsaturated perfluoroolefin which is a tetrafluoroethylene oligomer C 2n F 4n minus x fluorine atoms, and wherein R f is attached by an ether linkage to another organic radical R, and ether linkage being through the hydroxyl group minus the hydrogen atom of the hydroxyl group, wherein the organic radical R contains a hydrophilic group and said hydrophilic group is selected from the group consisting of an oxyalkylene chain, a carboxylate salt or a sulphonate salt.
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) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |