US4181790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymerization of ethylene employing an organic chlorine compound-activated Ziegler-Natta catalyst
Assignee: Huels AG
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Filing: 1979-03-09
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Granted: 1980-01-01
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Expires: 1999-03-09
Abstract
Abstract Ethylene and at least one other 1-monoolefin monomer, alone or in admixture with a non-conjugated hydrocarbon diene monomer, are copolymerized in the presence of organic chlorine compound-activated Ziegler-Natta catalyst, wherein the organic chlorine compound is a hydrocarbon or a halohydrocarbon ester of up to 15 carbon atoms of 2,3,4,4-tetrachloro-3-butenoic acid.
Inventors
- 👤 Gunther Maahs
- 👤 Konrad Rombusch
- 👤 Wolfgang Zaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:02
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
77 words
In a process for the production of copolymers of ethylene by the polymerization of an olefinic mixture of ethylene and at least one other 1-monoolefin monomer, alone or in admixture with a non-conjugated hydrocarbon diene monomer, employing as the polymerization catalyst an organic chlorine compound-activated Ziegler-Natta catalyst, the improvement which comprises employing, as the organic chlorine compound, a hydrocarbon ester or halohydrocarbon ester, each of up to 15 carbon atoms in the hydrocarbon group, of 2,3,4,4-tetrachloro-3-butenoic acid.
Claim 2
Dependent Claim
77 words
In a process for the production of copolymers of ethylene by the polymerization of an olefinic mixture of ethylene and at least one other 1-monoolefin monomer, alone or in admixture with a non-conjugated hydrocarbon diene monomer, employing as the polymerization catalyst an organic chlorine compound-activated Ziegler-Natta catalyst, the improvement which comprises employing, as the organic chlorine compound, a hydrocarbon ester or halohydrocarbon ester, each of up to 15 carbon atoms in the hydrocarbon group, of 2,3,4,4-tetrachloro-3-butenoic acid.
Claim 3
Dependent Claim
24 words
A process according to claim 1 wherein the organic chlorine compound is an alkyl ester of 1 to 6 carbon atoms of 2,3,4,4-tetrachloro-3-butenoic acid.
Claim 4
Dependent Claim
14 words
A process according to claim 1, wherein the organic chlorine compound is n-butyl 2,3,4,4-tetrachloro-3-butenoate.
Claim 5
Dependent Claim
14 words
A process according to claim 1, wherein the organic chlorine compound is methyl 2,3,4,4-tetrachloro-3-butenoate.
Claim 6
Dependent Claim
19 words
A process according to claim 1, wherein the Ziegler-Natta catalyst is a mixture of ethylaluminum sesquichloride and vanadium oxytrichloride.
Claim 7
Dependent Claim
43 words
A process according to claim 1, wherein the olefinic mixture is a mixture of ethylene and propylene, wherein the catalyst is a mixture of ethylaluminum sesquichloride and vanadium oxytrichloride activated by an alkyl ester of 1 to 6 carbon atoms of 2,3,4,4-tetrachloro-3-butenoic acid.
References Cited (Backward Citations)
US3645993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-31 | 1983-07-02 | 1984-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-31 | 1987-07-02 | 1988-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-31 | 1991-07-02 | 1992-01-01 | $7700.00 | Window Closed / Lapsed |