US3959409A
Expired / Lapsed
US
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Process for the production of crystalline propene-ethene-butene-1 terpolymers
Assignee: Huels AG
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Filing: 1974-10-16
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Granted: 1976-05-25
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Expires: 1994-10-16
Abstract
Abstract In a low pressure process for the production of crystalline propene-ethene-butene-1 terpolymers with 0.2 to 10% by weight of ethene and 0.2 to 5% by weight of butene-1 with the aid of mixed catalysts of TiCl 3 or TiCl 3 .sup.. n AlCl 3 (n = 0.2 to 0.6), and chlorine-containing organoaluminum compounds, the improvement comprising conducting the polymerization in butene-2 or in a C 4 -cut containing 20-99% butene-2, containing 0.1 - 2.5% of butene-1, with the addition of 0.2 to 10% of ethene, based on the amount of propene employed.
Inventors
- 👤 Albert Frese
- 👤 Fritz Baxmann
- 👤 Walter Dittmann
- 👤 Johann Dietrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:36
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16; C08F210/04; C08F210/06; C08F297/00; C08F297/06; C08F297/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
A low pressure polymerization process for the production of crystalline propene-ethene-butene-1 terpolymers containing 0.2-15% by weight ethene and 0.2-5% by weight butene-1, which comprises: polymerizing propene with 0.2-10% by weight ethene and 0.1-2.5% by weight butene-1, based on the propene, in the liquid phase with a mixed polymerization catalyst suspension consisting essentially of a) a titanium chloride component of the formula TiCl 3 or TiCl 3 . n AlCl 3 wherein n = 0.2-0.6 and b) a chlorine-containing organoaluminum compound in an Al:Ti molar ratio of 1.1-3.0 in a polymerization solvent consisting essentially of butene-2 or a C 4 -cut containing 20-99% by weight butene-2 to form said crystalline terpolymers.
Claim 2
Dependent Claim
110 words
A low pressure polymerization process for the production of crystalline propene-ethene-butene-1 terpolymers containing 0.2-15% by weight ethene and 0.2-5% by weight butene-1, which comprises: polymerizing propene with 0.2-10% by weight ethene and 0.1-2.5% by weight butene-1, based on the propene, in the liquid phase with a mixed polymerization catalyst suspension consisting essentially of a) a titanium chloride component of the formula TiCl 3 or TiCl 3 . n AlCl 3 wherein n = 0.2-0.6 and b) a chlorine-containing organoaluminum compound in an Al:Ti molar ratio of 1.1-3.0 in a polymerization solvent consisting essentially of butene-2 or a C 4 -cut containing 20-99% by weight butene-2 to form said crystalline terpolymers.
Claim 3
Dependent Claim
13 words
A process according to claim 1, wherein catalyst component b) is diethylaluminum chloride.
Claim 4
Dependent Claim
15 words
A process according to claim 1, wherein the Al:Ti molar ratio is 1.3:1 to 2.0:1.
Claim 5
Dependent Claim
16 words
A process according to claim 1, wherein the ethene is added continuously during the polymerization period.
Claim 6
Dependent Claim
17 words
A process according to claim 1, wherein the addition of ethene takes place at intermittent time intervals.
Claim 7
Dependent Claim
23 words
A process according to claim 1, wherein ethene is added after a conversion of more than 50%, based on the final polymer product.
Claim 8
Dependent Claim
17 words
A process according to claim 6, wherein ethene is added after a conversion of more than 75%.
Claim 9
Dependent Claim
23 words
A process according to claim 1, wherein said polymerization solvent contains 0.1-1.5% by weight butene-1 and not more than 0.5% by weight isobutene.
Claim 10
Dependent Claim
18 words
A process according to claim 1, further comprising working up the resultant reaction mixture by adiabatic expansion thereof.
Claim 11
Dependent Claim
79 words
A process according to claim 1, wherein the catalyst is one in which component a) is TiCl 3 . n AlCl 3 , component b) is diethylaluminum chloride and the molar ratio of Al:Ti is 1.3:1 to 2.0:1, the polymerization solvent is a C 4 -cut containing 0.1-1.5% by weight butene-1 and not more than 0.5% by weight isobutene; and the ethene is added after a conversion of more than 50%, based on the total conversion, has been reached.
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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) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |