US3654249A
Expired / Lapsed
US
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Process for polymerizing alpha-olefins
Assignee: Hoechst AG
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Filing: 1969-06-25
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Granted: 1972-04-04
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Expires: 1989-06-25
Abstract
Abstract THIS INVENTION PROVIDES A PROCESS FOR HOMOPOLYMERIZING OR COPOLYMERIZINAG ETHYLENE IN THE PRESENCE OF MIXED CATALYSTS COMPRISING AS COMPONENT A THE REACTION PRODUCT OF 0.1 TO 1.0 PART BY WEIGHT OF MG(OH)2, 1 PART BY WEIGHT OF TI(O-ISOC3H7)4 AND 0.4 TO 0.9 PART BY WEIGHT OF TICL4 AND AS COMPONENT B AN ORGANO-ALUMINUM CONPOUND. UNDER A PRESSURE OF UP TO 20 ATMOSPHERES THE POLYMER YIELDS ARE SO HIGH PER UNIT OF CATALYST THAT THE RESIDUES THEREOF NEED NOT BE REMOVED. BY VARIATION OF THE PROPORTIONS OF MG(OH)2 TO TITANIUM COMPOUNDS POLYMERS HAVING DENSITIES IN THE INDUSTRIALLY INTERESTING RANGE OF FROM 0.952 TO 0.962 G/CC. CAN BE OBTAINED.
Inventors
- 👤 Bernd Diedrich
- 👤 Wilhelm Dummer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:25
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02; C07; C07F; C07F7/00; C07F7/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |