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US3705138A
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US
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Process for the preparation of amorphous copolymers of ethylene
Assignee: Stamicarbon BV
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Filing: 1969-06-30
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Granted: 1972-12-05
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Expires: 1989-06-30
Abstract
Abstract A process for the preparation of amorphous copolymers of ethylene, one or more other Alpha -alkenes, and optionally one or more compounds containing more than one C=C bond, using a catalyst comprising an aluminum dihalide, a vanadium compound and an organo metal compound, the catalyst being dispersed in a liquid dispersing agent.
Inventors
- 👤 Cornelis E P V Van Den Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:22
CPC Classifications
C; C08; C08F; C08F210/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
16 words
Process according to claim 1, wherein the organic alkali metal compound is an organic lithium compound.
Claim 2
Dependent Claim
14 words
Process according to claim 2, wherein the organic lithium compound is normal butyl lithium.
Claim 3
Dependent Claim
29 words
Process according to claim 1 wherein the organic alkali metal compound is present in an amount of 10- 40 mole percent based on the amount of the aluminum compound.
Claim 4
Dependent Claim
94 words
A process according to claim 1 wherein the Alpha -alkene is selected from the group consisting of propylene, butene-1, pentene-1, hexene-1, octene-1, 4-methylpentene-1, styrene, Alpha -methyl-styrene, and the polyunsaturated hydrocarbon compound is selected from the group consisting of 1- 3-butadiene, isoprene, 2,3-dimethyl butadiene, 1-3,2-ethyl butadiene-1-3, piperylene, myrcene, allene, 1,2-butadiene, 1,4,9-decatrienes, 1-4-hexadiene, 1,5-hexadiene, 4-methyl hexadiene-1-4, alkyl norbonadiene, alkylidene norbornenes in which the alkylidene group contains up to 20 carbon atoms, alkenyl norberrenes in which the alkenyl group contains up to 20 carbon atoms, dicyclo (2,2,0)-heptane, dicyclo-(2,2,2)-octane, dicyclo-(3,2,1)-octane, dicyclo-(3,2,2)-nonane, 4,7,8,9-tetrahydroindene, isopropylidene tetrahydroindene, dicyclopentadiene and hexadiene 1-4.
Claim 5
Dependent Claim
14 words
The process according to claim 1, wherein said vanadium compound is VOCl3 or VOCl4.
Claim 6
Dependent Claim
13 words
The process according to claim 1, wherein said organoaluminum dihalide is mono-ethyl-aluminum dichloride.
Claim 7
Dependent Claim
22 words
The process according to claim 1 wherein the ratio between said aluminum compound and said vanadium compound is between 1:1 and 100:1.
Claim 8
Dependent Claim
14 words
The process according to claim 8 wherein said ratio is between 3:1 and 15:1.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |