Patent US3277069A successfully refreshed from Google Patents.
US3277069A
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Polymerization catalysts containing titanium trichloride, alkyl aluminum dihalides and onium halides, and process for preparing same
Assignee: Montedison SpA
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Filing: 1961-06-26
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Granted: 1966-10-04
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Expires: 1981-06-26
Abstract
No abstract record available.
Inventors
- 👤 Natta Giulio
- 👤 Zambelli Adolfo
- 👤 Pasquon Italo
- 👤 Farina Mario
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:03
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
THE PROCESS FOR POLYMERIZING A HIGHER ALPHA-OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND BUTENE-1 TO A POLYMERIZATE HAVING A HIGH CONTENT OF ISOTATIC MACROMOLECULES, WHICH PROCESS COMPRISES CONTACTING THE ALPHA-OLEFIN, UNDER POLYMERIZATION CONDITIONS, WITH A CATALYTIC SYSTEM OBTAINED BY CONTACTING A SUBSTANCE COMSISTING OF A MONOALKYL ALUMINUM DIHALIDE WITH AN ONIUM HALIDE SELECTED FROM THE GROUP CONSISTING OF TETRA-ALKYLAMMONIUM HALIDES, TETRA-ALKYLPHOSPHONIUM HALIDES, AND TRIALKYLSULFONIUM HALIDES, IN A MOLAR RATIO OF FROM 1:0.4 TO 1:0.6, AND MIXING THE REACTION PRODUCT THUS OBTAINED WITH A TRANSITION METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF VIOLET CRYSTALLINE TITANIUM TRICHLORIDE AND MIXTURE THEREOF WITH ALUMINUM CHLORIDE.
Claim 2
Dependent Claim
104 words
THE PROCESS FOR POLYMERIZING A HIGHER ALPHA-OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND BUTENE-1 TO A POLYMERIZATE HAVING A HIGH CONTENT OF ISOTATIC MACROMOLECULES, WHICH PROCESS COMPRISES CONTACTING THE ALPHA-OLEFIN, UNDER POLYMERIZATION CONDITIONS, WITH A CATALYTIC SYSTEM OBTAINED BY CONTACTING A SUBSTANCE COMSISTING OF A MONOALKYL ALUMINUM DIHALIDE WITH AN ONIUM HALIDE SELECTED FROM THE GROUP CONSISTING OF TETRA-ALKYLAMMONIUM HALIDES, TETRA-ALKYLPHOSPHONIUM HALIDES, AND TRIALKYLSULFONIUM HALIDES, IN A MOLAR RATIO OF FROM 1:0.4 TO 1:0.6, AND MIXING THE REACTION PRODUCT THUS OBTAINED WITH A TRANSITION METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF VIOLET CRYSTALLINE TITANIUM TRICHLORIDE AND MIXTURE THEREOF WITH ALUMINUM CHLORIDE.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |