US4086407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoro compound preparation
Assignee: Phillips Petroleum Co
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Filing: 1976-08-02
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Granted: 1978-04-25
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Expires: 1996-08-02
Abstract
Abstract Compounds of the formulas ##STR1## and mixtures thereof are prepared by codimerization of R f --CF═CF 2 and R--CH═CH 2 . The cleavage product of the cyclobutane derivatives is copolymerized.
Inventors
- 👤 George B. Fozzard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:19
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C07; C07C; C07C17/00; C07C17/26; C07C17/272; C07C17/275; C07C23/00; C07C23/02; C07C23/06; C08F; C08F214/00; C08F214/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
67 words
The process of polymerization which comprises: (a) cyclodimerizing hexafluoropropylene and ethylene under dimerizing conditions at a temperature in the range of 200° C. to 600° C., thereby producing the codimer 1-trifluoromethyl-1,2,2-trifluorocyclobutane, (b) cracking said codimer 1-trifluoromethyl-1,2,2-trifluorocyclobutane under cracking conditions, thereby producing an admixture of 2,3,3-tetrafluoropropylene and vinylidene fluoride, and (c) polymerizing said 2,3,3-tetrafluoropropylene, said vinylidene fluoride, or copolymerizing both together under polymerization conditions, thereby producing a polymer.
Claim 2
Dependent Claim
67 words
The process of polymerization which comprises: (a) cyclodimerizing hexafluoropropylene and ethylene under dimerizing conditions at a temperature in the range of 200° C. to 600° C., thereby producing the codimer 1-trifluoromethyl-1,2,2-trifluorocyclobutane, (b) cracking said codimer 1-trifluoromethyl-1,2,2-trifluorocyclobutane under cracking conditions, thereby producing an admixture of 2,3,3-tetrafluoropropylene and vinylidene fluoride, and (c) polymerizing said 2,3,3-tetrafluoropropylene, said vinylidene fluoride, or copolymerizing both together under polymerization conditions, thereby producing a polymer.
Claim 3
Dependent Claim
14 words
A process according to claim 1 wherein said vinylidene fluoride and 2,3,3,3-tetrafluoropropylene are copolymerized.
Claim 4
Dependent Claim
22 words
A process according to claim 1 wherein said codimer is cracked at a temperature in the range of 500° to 1000° C.
Claim 5
Dependent Claim
20 words
A process according to claim 1 wherein said codimer is cracked at a temperature in the range of 600°-700° C.
References Cited (Backward Citations)
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US3085996A
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US2957032A
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US2931840A
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US3662009A
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US3789088A
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US3767820A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |