US4871704A
Expired / Lapsed
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Catalyst for olefin polymerization
Assignee: Tonen General Sekiyu KK
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Filing: 1988-10-07
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Granted: 1989-10-03
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Expires: 2008-10-07
Abstract
Abstract A catalyst for olefin polymerization which comprises: (A) a catalyst component obtained by reacting (a) pentadiene or a derivative thereof with (b) an alkali metal and subsequently reacting the reaction product with (c) a titanium compound or zirconium compound, and (B) aluminoxane. t
Inventors
- 👤 Tadanao Kohara
- 👤 Satoshi Ueki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:48
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/941; Y10S526/943
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
34 words
A catalyst comprising (i) a catalyst component obtained by reacting (i) a pentadiene with (b) an alkali metal and contacting the product therefrom with (c) a Group 4b metal compound, and (ii) an aluminoxane.
Claim 2
Dependent Claim
34 words
A catalyst comprising (i) a catalyst component obtained by reacting (i) a pentadiene with (b) an alkali metal and contacting the product therefrom with (c) a Group 4b metal compound, and (ii) an aluminoxane.
Claim 3
Dependent Claim
78 words
The catalyst in accordance with claim 1 wherein the pentadiene is represented by the formula: ##STR4## wherein R 1 represents hydrogen, a hydrocarbyl group having from 1 to 8 carbon atoms, or a --Si(OR 4 ) 3 group, R 2 and R 3 , which can be the same or different, each represents a hydrogen or hydrocarbyl group having one 1 to 8 carbon atoms and R 4 represents a hydrocarbyl group having 1 to 5 carbon atoms.
Claim 4
Dependent Claim
18 words
The catalyst in accordance with claim 2 wherein the Group 4b metal is selected from zirconium and titanium.
Claim 5
Dependent Claim
21 words
The catalyst in accordance with claim 2 wherein the Group 4b metal compound is a titanium halide or a zirconium halide.
Claim 6
Dependent Claim
21 words
The catalyst in accordance with claim 3 wherein the Group 4b metal compound is a titanium halide or a zirconium halide.
Claim 7
Dependent Claim
16 words
The catalyst in accordance with claim 2 further characterized in being supported on a metal oxide.
Claim 8
Dependent Claim
17 words
The catalyst in accordance with claim 5 wherein the catalyst component is supported on the metal oxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |