US3859262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of fluorine-containing polymers
Assignee: Hoechst AG
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Filing: 1971-07-21
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Granted: 1975-01-07
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Expires: 1991-07-21
Abstract
Abstract This invention provides a process for the manufacture of a copolymer containing at least one fluorinated mono- Alpha -olefin by copolymerizing said fluorinated mono- Alpha -olefin with ethylene at a low pressure using as catalyst acids of manganese, their salts or derivatives forming said acids of manganese under the reaction conditions.
Inventors
- 👤 Robert Hartwimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:14
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/186; C08F10/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
129 words
A PROCESS FOR THE MANUFACTURE OF A COPOLYMER CONTAINING FROM 30 TO 80 MOLE %, CALCULATED ON THE TOTAL COPOLYMER, OF AT LEAST ONE FLUORINATED MONO-A-OLEFIN HAVING FROM 2 TO 6 CARBON ATOMS AND FROM 20 TO 70 MOLE % OF ETHYLENE BY COPOLYMERIZATION OF SAID FLUORINATED MONO-A-OLEFIN WITH ETHYLENE IN AN AQUEOUS PHASE WHICH COMPRISES CARRYING OUT THE COPOLYMERIZATION AT A PRESSURE OF FROM 0 TO 25 ATMOSPHERES GAUGE AND A TEMPERATURE OF FROM 0* TO 100*C, IN AN ACID MEDIUM IN THE PRESENCE OF FROM 0.001 TO 0.1% BY WEIGHT, CALCULATED ON THE TOTAL AMOUNT OF THE POLYMERIZATION BATH, OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF AN ACID OF MANGANESE, A SALT THEREOF AND A DERIVATIVE FORMING SAID ACID OF MANGANESE UNDER THE REACTION CONDITIONS.
Claim 2
Dependent Claim
129 words
A PROCESS FOR THE MANUFACTURE OF A COPOLYMER CONTAINING FROM 30 TO 80 MOLE %, CALCULATED ON THE TOTAL COPOLYMER, OF AT LEAST ONE FLUORINATED MONO-A-OLEFIN HAVING FROM 2 TO 6 CARBON ATOMS AND FROM 20 TO 70 MOLE % OF ETHYLENE BY COPOLYMERIZATION OF SAID FLUORINATED MONO-A-OLEFIN WITH ETHYLENE IN AN AQUEOUS PHASE WHICH COMPRISES CARRYING OUT THE COPOLYMERIZATION AT A PRESSURE OF FROM 0 TO 25 ATMOSPHERES GAUGE AND A TEMPERATURE OF FROM 0* TO 100*C, IN AN ACID MEDIUM IN THE PRESENCE OF FROM 0.001 TO 0.1% BY WEIGHT, CALCULATED ON THE TOTAL AMOUNT OF THE POLYMERIZATION BATH, OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF AN ACID OF MANGANESE, A SALT THEREOF AND A DERIVATIVE FORMING SAID ACID OF MANGANESE UNDER THE REACTION CONDITIONS.
Claim 3
Dependent Claim
18 words
The process of claim 1, wherein a mixture of said fluorinated mono- Alpha -olefins is copolymerized with ethylene.
Claim 4
Dependent Claim
16 words
The process of claim 1, wherein said fluorinated mono- Alpha -olefin is a perfluoro-mono- Alpha -olefin.
Claim 5
Dependent Claim
13 words
The process of claim 1, wherein said fluorinated mono- Alpha -olefin is tetrafluoroethylene.
Claim 6
Dependent Claim
18 words
The process of claim 1, wherein said fluorinated mono- Alpha -olefin contains chlorine or bromine as further halogen.
Claim 7
Dependent Claim
13 words
The process of claim 1, wherein said fluorinated mono- Alpha -olefin is trifluorochloroethylene.
Claim 8
Dependent Claim
13 words
The process of claim 1, wherein said fluorinated mono- Alpha -olefin contains hydrogen.
Claim 9
Dependent Claim
20 words
The process of claim 1, wherein the copolymerization is carried out under a pressure of 5 to 15 atmospheres gauge.
Claim 10
Dependent Claim
19 words
The process of claim 1, wherein the copolymerization is carried out at a temperature of from 5* to 50*C.
Claim 11
Dependent Claim
29 words
The process of claim 1, wherein said salt is a salt selected from the group consisting of a salt of permanganic acid, manganic acid, hypomanganic acid and manganous acid.
Claim 12
Dependent Claim
20 words
The process of claim 1, wherein said salt is selected from the group consisting of potassium permanganate and potassium manganate.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |