US3883495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and catalyst for ring opening polymerisation
Assignee: Bayer AG
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Filing: 1973-04-04
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Granted: 1975-05-13
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Expires: 1993-04-04
Abstract
Abstract A catalyst of A. A MOLYBDENUM SALT B. AN ETHER C. AN ORGANO ALUMINIUM COMPOUND AND D. A Lewis acid IS DESCRIBED AS WELL AS A PROCESS FOR ITS MANUFACTURE. This catalyst is used to polymerise and copolymerise cyclic olefins under ring opening to form polyalkenamers. Polymerisation in an inert organic solvent is preferred. The polymers obtained are vulcanisable rubbers or thermoplasts.
Inventors
- 👤 Dieter Maertens
- 👤 Gunther Lehnert
- 👤 Manfred Zimmermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:05
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
56 words
A PROCESS FOR POLYMERIZING A CYCLIC OLEFIN HAVING 4,5,7, 8 OR MORE RING CARBON ATOMS AND 1 CARBON-TO-CARBON DOUBLE BOND OR A PLURALITY OF NON-CONJUGATED CARBON-TO-CARBON DOUBLE BLE BONDS IN THE RING, SAID PROCESS COMPRISING CONTACTING SAID CYCLIC CYCLIC OLEFIN WITH A CATALYST OF A. A MOLYBDENUM HALIDE OR OXYHALIDE, B. AN ESTER OF THE FORMULA
Claim 2
Dependent Claim
56 words
A PROCESS FOR POLYMERIZING A CYCLIC OLEFIN HAVING 4,5,7, 8 OR MORE RING CARBON ATOMS AND 1 CARBON-TO-CARBON DOUBLE BOND OR A PLURALITY OF NON-CONJUGATED CARBON-TO-CARBON DOUBLE BLE BONDS IN THE RING, SAID PROCESS COMPRISING CONTACTING SAID CYCLIC CYCLIC OLEFIN WITH A CATALYST OF A. A MOLYBDENUM HALIDE OR OXYHALIDE, B. AN ESTER OF THE FORMULA
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein polymerisation is carried out in an inert organic solvent.
Claim 4
Dependent Claim
26 words
The process of claim 1 wherein said Lewis acid is a halide of an element of Group IIIa, IVa, IVb or Vb of the Periodic Table.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |