US4483971A
Expired / Lapsed
US
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Process for producing terpolymers of propylene, ethylene and another .alpha.
Assignee: JNC Corp
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Filing: 1983-02-25
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Granted: 1984-11-20
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Expires: 2003-02-25
Abstract
Abstract A process for producing terpolymers of propylene (as a main monomer), ethylene and another α-olefin having superior and well-balanced physical properties, almost without forming soluble polymer is provided. This process is characterized by preliminarily activating a catalyst consisting of a titanium trichloride composition and a specified organoaluminum halide, with a small amount of an α-olefin of 2 to 12 carbon atoms, a trialkylaluminum and an aromatic ester, and copolymerizing specified amounts of propylene, ethylene and an α-olefin of 4 to 12 carbon atoms in the presence of the preliminarily activated catalyst obtained above.
Inventors
- 👤 Akihiro Sato
- 👤 Takeshi Suzuki
- 👤 Kazutsune Kikuta
- 👤 Hiromasa Chiba
- 👤 Toshihiro Uwai
- 👤 Kenji Matsuda
- 👤 Tohru Hanari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:50
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/04; C08F210/06; Y; Y10; Y10S; Y10S526/00; Y10S526/904
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
169 words
A process for producing terpolymers of ethylene, propylene and another alpha-olefin, which comprises (a) preliminarily activating a catalyst consisting of a titanium trichloride composition obtained by reacting a reaction product (I) of (A 2 ) an organoaluminum compound with an electron donor, with TiCl 4 to obtain a solid product (II), which is further reacted with an electron donor and an electron acceptor and an organoaluminum halide expressed by the general formula AlR 1 R 2 X wherein R 1 and R 2 are the same or different alkyl, aryl or alkaryl groups and X represents a halogen atom, with an alpha-olefin of 2 to 12 carbon and a reaction product of a trialkylaluminum and an aromatic ester, and (b) copolymerizing 1.0 to 3.5% by weight of ethylene, 88 to 96% by weight of propylene and 1.0 to 10.0% by weight of another alpha-olefin of 4 to 12 carbon atoms based on the total weight of these monomers, in the presence of the preliminarily activated catalyst of step (a).
Claim 2
Dependent Claim
169 words
A process for producing terpolymers of ethylene, propylene and another alpha-olefin, which comprises (a) preliminarily activating a catalyst consisting of a titanium trichloride composition obtained by reacting a reaction product (I) of (A 2 ) an organoaluminum compound with an electron donor, with TiCl 4 to obtain a solid product (II), which is further reacted with an electron donor and an electron acceptor and an organoaluminum halide expressed by the general formula AlR 1 R 2 X wherein R 1 and R 2 are the same or different alkyl, aryl or alkaryl groups and X represents a halogen atom, with an alpha-olefin of 2 to 12 carbon and a reaction product of a trialkylaluminum and an aromatic ester, and (b) copolymerizing 1.0 to 3.5% by weight of ethylene, 88 to 96% by weight of propylene and 1.0 to 10.0% by weight of another alpha-olefin of 4 to 12 carbon atoms based on the total weight of these monomers, in the presence of the preliminarily activated catalyst of step (a).
Claim 3
Dependent Claim
41 words
A process according to claim 1 wherein said preliminary activation is carried out so that the amount of poly-α-olefin formed in the preliminary activation corresponds to 1 to 5% by weight based on the weight of the terpolymers after said copolymerization.
Claim 4
Dependent Claim
20 words
A process according to claim 1 wherein said copolymerization is carried out at a temperature of 45° to 65° C.
Claim 5
Dependent Claim
57 words
A process according to claim 1 wherein said preliminary activation is carried out by reacting said α-olefin with the combination of a titanium trichloride composition with an organoaluminum halide expressed by said general formula AlR 1 R 2 X, and thereafter adding to the resulting reaction product, a reaction product of a trialkylaluminum with an aromatic ester.
Claim 6
Dependent Claim
49 words
A process according to claim 1 wherein said preliminary activation is carried out by adding a titanium trichloride composition, an organoaluminum halide expressed by the general formula AlR 1 R 2 X, and a reaction product of a trialkylaluminum with an aromatic ester in the presence of said α-olefin.
Claim 7
Dependent Claim
39 words
A process according to claim 1 wherein said preliminary activation is carried out by reacting said α-olefin with a mixture of a titanium trichloride composition, an organoaluminum halide, and a reaction product of a trialkylaluminum with an aromatic ester.
Claim 8
Dependent Claim
16 words
A process according to claim 1 wherein said aromatic ester is an aromatic carboxylic acid ester.
References Cited (Backward Citations)
US3769373A
Cited
US4210729A
Cited
US3959409A
Cited
US4304890A
Cited
US4234710A
Cited
US4161574A
Cited
US4200717A
Cited
US4269732A
Cited
US4367322A
Cited
US4235747A
Cited
US4309521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |