US4874880A
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US
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Bis(di-, tri- or tetra-substituted-cyclopentadienyl)-zirconium dihalides
Assignee: JNC Corp
•
Filing: 1988-02-22
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Granted: 1989-10-17
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Expires: 2008-02-22
Abstract
Abstract Bis(di-, tri- or tetra-substituted-cyclopentadienyl)zirconium dihalides represented by the following general formula [I] are provided, ##STR1## (wherein R 1 denotes a substituent group on the cyclopentadienyl ring which is an alkyl radical of 1 to 5 carbon atoms; R 2 1 --C 5 H 3 stands for a di-substituted cyclopentadienyl radical; and X is a halogen atom). This compound, when combined with an aluminoxane repesented by the following general formula [VII], gives a high-activity catalyst for the synthesis of polyolefins, ##STR2## (wherein m is an integer of 4 to 20; and R 2 denotes a hydrocarbyl radical).
Inventors
- 👤 Shinya Miya
- 👤 Masato Harada
- 👤 Takaya Mise
- 👤 Hiroshi Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:10
CPC Classifications
C; C07; C07F; C07F17/00; C08; C08F; C08F10/00; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65912; C08F4/6592; C08F4/65922; C08F4/65925; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
51 words
Bis(di-substituted-cyclopentadienyl)zirconium dihalides represented by the following general formula or, ##STR9## wherein R 1 denotes a substituent group on the cyclopentadienyl ring which is an alkyl radical of 1 to 5 carbon atoms; R 2 1 --C 5 H 3 stands for a di-substituted cyclopentadienyl radical; and X is a halogen atom.
Claim 2
Dependent Claim
51 words
Bis(di-substituted-cyclopentadienyl)zirconium dihalides represented by the following general formula or, ##STR9## wherein R 1 denotes a substituent group on the cyclopentadienyl ring which is an alkyl radical of 1 to 5 carbon atoms; R 2 1 --C 5 H 3 stands for a di-substituted cyclopentadienyl radical; and X is a halogen atom.
Claim 3
Dependent Claim
51 words
Bis(tri-substituted-cyclopentadienyl)zirconium dihalides represented by the following general formula or, ##STR10## wherein R 1 denotes a substituent group on the cyclopentadienyl ring which is an alkyl radical of 1 to 5 carbon atoms; R 3 1 --C 5 H 2 stands for a tri-substituted cyclopentadienyl radical; and X is a halogen atom.
Claim 4
Dependent Claim
51 words
Bis(tri-substituted-cyclopentadienyl)zirconium dihalides represented by the following general formula or, ##STR10## wherein R 1 denotes a substituent group on the cyclopentadienyl ring which is an alkyl radical of 1 to 5 carbon atoms; R 3 1 --C 5 H 2 stands for a tri-substituted cyclopentadienyl radical; and X is a halogen atom.
Claim 5
Dependent Claim
49 words
Bis(tetra-substituted-cyclopentadienyl)zirconium dihalides represented by the following general formula, ##STR11## wherein R 1 denotes a substituent group on the cyclopentadienyl ring which is an alkyl radical of 1 to 5 carbon atoms; R 4 1 --C 5 H stands for a tetra-substituted cyclopentadienyl radical; and X is a halogen atom.
Claim 6
Dependent Claim
49 words
Bis(tetra-substituted-cyclopentadienyl)zirconium dihalides represented by the following general formula, ##STR11## wherein R 1 denotes a substituent group on the cyclopentadienyl ring which is an alkyl radical of 1 to 5 carbon atoms; R 4 1 --C 5 H stands for a tetra-substituted cyclopentadienyl radical; and X is a halogen atom.
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| 3.5 Years (Year 4) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
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