Patent US4483971A successfully refreshed from Google Patents.
US4483971A
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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 01:07
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.
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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) | 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 |