US4079084A
Expired / Lapsed
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Fluorocarbon surfactants
Assignee: Imperial Chemical Industries Ltd
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Filing: 1974-07-25
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Granted: 1978-03-14
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Expires: 1994-07-25
Abstract
Abstract Novel fluorocarbon surfactants containing a non-ionic hydrophilic chain (preferably an oxyethylene chain) and at least two terminal perfluorocarbon groups of at least three carbon atoms, preferably branched perfluorocarbon groups derived from an oligomer of tetrafluoroethylene.
Inventors
- 👤 Leonard Eric Houghton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:14
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/334; C08G65/3344; C08G65/321; C08G65/326; C08G65/331; C08G65/332; C08G65/3348; C09; C09G; C09G1/00; C09G1/06; C09G1/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
41 words
A compound having the formula R.sub.f O(CH.sub.2 CH.sub.2 O).sub.p R.sub.f wherein each R f may be the same or different and is a perfluoroalkenyl group containing from three to twenty carbon atoms, and p is a number from 2 to 100.
Claim 2
Dependent Claim
41 words
A compound having the formula R.sub.f O(CH.sub.2 CH.sub.2 O).sub.p R.sub.f wherein each R f may be the same or different and is a perfluoroalkenyl group containing from three to twenty carbon atoms, and p is a number from 2 to 100.
Claim 3
Dependent Claim
26 words
A compound as claimed in claim 1 wherein each group R f is the perfluoroolefine residue of a perfluorolefine after a fluorine atom is abstracted therefrom.
Claim 4
Dependent Claim
19 words
A compound as claimed in claim 1 wherein the group R f contains from six to twelve carbon atoms.
Claim 5
Dependent Claim
39 words
A compound as claimed in claim 1 wherein the R f group is selected from the group consisting of C 8 F 15 , C 10 F 19 and C 12 F 23 and C 6 F 13 .
Claim 6
Dependent Claim
16 words
A compound as claimed in claim 1 wherein p is a number from 5 to 30.
Claim 7
Dependent Claim
19 words
A compound as claimed in claim 1 wherein R f is derived from an oligomer of tetrafluoroethylene or hexafluoropropene.
Claim 8
Dependent Claim
32 words
A compound according to claim 1 wherein R f is selected from the group: C.sub.2 F.sub.5 -C(CF.sub.3)═C(C.sub.2 F.sub.5)CF.sub.2 --, (c.sub.2 f.sub.5).sub.2 c(cf.sub.3)-c(cf.sub.3)═c(cf.sub.3)--, c.sub.2 f.sub.5 -c(cf.sub.3)═c(cf.sub.3)-cf.sub.2 cf.sub.2 --, and (C.sub.4 F.sub.9)(C.sub.2 F.sub.5)CF.sub.3 C-C(CF.sub.3)═C(CF.sub.3)--.
Claim 9
Dependent Claim
18 words
A compound as claimed in claim 1 wherein R f is an unsaturated straight or branched chain group.
Claim 10
Dependent Claim
15 words
A compound as claimed in claim 1 wherein R f is an unaturated branched group.
Claim 11
Dependent Claim
38 words
A compound having the formula: ##STR8## where R is H; R f is a perfluoroalkenyl group containing from three to twenty carbon atoms; p is a number from 2 to 100; and each R f is the same.
Claim 12
Dependent Claim
38 words
A compound having the formula: ##STR8## where R is H; R f is a perfluoroalkenyl group containing from three to twenty carbon atoms; p is a number from 2 to 100; and each R f is the same.
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) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |