US4806694A
Expired / Lapsed
US
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Polyols
Assignee: Syngenta Ltd
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Filing: 1987-09-10
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Granted: 1989-02-21
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Expires: 2007-09-10
Abstract
Abstract Fluorine-containing polyols obtained by the free radical addition of a fluoro-olefin having the general formula: <IMAGE> (1) wherein Y represents F and Z represents Cl or F(CF2)n-wherein n is an integer from 0 to 10 or Y and Z together form a -(CF2)m- chain wherein m represents an integer from 2 to 4 to a polyol wherein each hydroxyl group is directly attached to a group of the formula: -(CH2)pO-(2) wherein p is an integer of at least 4.
Inventors
- 👤 Richard L. Powell
- 👤 Brian Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:54
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/34; C07C31/42; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13; C07C43/137; C07C29/00; C07C29/44; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/63; C08G18/638
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
A fluorine-containing polyol obtained by the addition, at a temperature of up to 200° C. and in the presence of a free radical generator, of a fluoro-olefin having the general formula: ##STR4## wherein Y represents F and Z represents Cl or F(CF 2 )n-- wherein n is an integer from 0 to 10 or Y and Z together form a --(CF 2 )m-- chain wherein m represents an integer from 2 to 4 to a polytetramethylene glycol having a molecular weight in the range from 162 to 5000.
Claim 2
Dependent Claim
88 words
A fluorine-containing polyol obtained by the addition, at a temperature of up to 200° C. and in the presence of a free radical generator, of a fluoro-olefin having the general formula: ##STR4## wherein Y represents F and Z represents Cl or F(CF 2 )n-- wherein n is an integer from 0 to 10 or Y and Z together form a --(CF 2 )m-- chain wherein m represents an integer from 2 to 4 to a polytetramethylene glycol having a molecular weight in the range from 162 to 5000.
Claim 3
Dependent Claim
15 words
A fluorine-containing polyol according to claim 1 wherein the fluoro-olefin is tetrafluoroethene, chlorotetrafluoroethene or hexafluoropropene.
Claim 4
Dependent Claim
20 words
A fluorine-containing polyol according to claim 2 having a fluorine content of from 5 to 60% on a weight basis.
References Cited (Backward Citations)
US2559628A
Cited
US3927129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |