US3560459A
Expired / Lapsed
US
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Catalyst system and process for preparing polymers from cationically polymerizable monomers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1969-04-14
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Granted: 1971-02-02
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Expires: 1989-04-14
Abstract
Abstract A CATALYST IS PREPARED BY REACTING ALKYL ALUMINUM DIHALIDE IN THE ABSENCE OF A HYDROCARBON SOLVENT, WITH A COBALT SALT TO FORM A BLUE LIQUID COMPLEX. THE CATALYST SO FORMED MAY BE USED TO PREPARE HIGHLY UNSATURATED POLYMERS AND COPOLYMERS OF CATIONICALLY POLYMERIZABLE MONOMERS. THE POLYMERS OF THIS INVENTION ARE RUBBERY HIGH MOLECULAR WEIGHT MATERIALS. THE PREFERRED MONOMERS ARE ISOBUTYLENE AND ISOPRENE. THE PREFERRED ALKYL ALUNIMUM HALIDE IS ALUMINUM ETHYL DIHALIDE AND THE PREFERRED COBALT SALTS ARE COCL2 COBALT BROMIDE AND COBALT ACETONYL ACETONATE.
Inventors
- 👤 Joseph P Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:26
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10S; Y10S526/00; Y10S526/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |