US5329031A
Expired / Lapsed
US
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Metallocene and process for producing polyolefin using the same
Assignee: Resonac Holdings Corp
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Filing: 1992-11-30
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Granted: 1994-07-12
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Expires: 2012-11-30
Abstract
Abstract A metallocene having an asymmetric ligand which is represented by the formula below and its enantiomer: ##STR1## and a process for producing a polyolefin using the same as a catalyst component. The metallocene and its enantiomer are particularly effective in the production of highly stereospecific polyolefins.
Inventors
- 👤 Shigenobu Miyake
- 👤 Nobuyuki Kibino
- 👤 Takashi Monoi
- 👤 Hiroyuki Ohira
- 👤 Shintaro Inazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:56
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; C08F4/65916; C08F4/6592; C08F4/65922; C08F4/65927; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
A metallocene represented by formula (I) and its enantiomer: ##STR8## wherein M represents a transition metal selected from Ti, Zr, and Hf; X 1 and X 2 , which may be the same or different each represents a hydrogen atom, a hydrocarbon group containing from 1 to 10 carbon atoms, an alkylsilyl group, an arylsilyl group, or a halogen atom; R 1 , R.sup. 2, R 3 , R 6 , and R 7 each represents a hydrogen atom, a hydrocarbon group containing from 1 to 10 carbon atoms, an alkylsilyl group, or an arylsilyl group, provided that either one of R 1 and R 2 is not a hydrogen atom; R 4 and R 5 each represents a hydrocarbon group containing from 1 to 10 carbon atoms, an alkylsilyl group, or an arylsilyl group, or they are connected together to form a ring; Y represents a carbon atom, a silicon atom, or a germanium atom; and n represents an integer of from 1 to 3.
Claim 2
Dependent Claim
166 words
A metallocene represented by formula (I) and its enantiomer: ##STR8## wherein M represents a transition metal selected from Ti, Zr, and Hf; X 1 and X 2 , which may be the same or different each represents a hydrogen atom, a hydrocarbon group containing from 1 to 10 carbon atoms, an alkylsilyl group, an arylsilyl group, or a halogen atom; R 1 , R.sup. 2, R 3 , R 6 , and R 7 each represents a hydrogen atom, a hydrocarbon group containing from 1 to 10 carbon atoms, an alkylsilyl group, or an arylsilyl group, provided that either one of R 1 and R 2 is not a hydrogen atom; R 4 and R 5 each represents a hydrocarbon group containing from 1 to 10 carbon atoms, an alkylsilyl group, or an arylsilyl group, or they are connected together to form a ring; Y represents a carbon atom, a silicon atom, or a germanium atom; and n represents an integer of from 1 to 3.
Claim 3
Dependent Claim
16 words
The metallocene and its enantiomer as claimed in claim 1, wherein Y is a carbon atom.
Claim 4
Dependent Claim
58 words
The metallocene and its enantiomer as claimed in claim 1, which is a compound represented by formula (II) and its enantiomer: ##STR9## wherein M, X 1 , X 2 , R 1 , R 2 , R 3 , R 6 , R 7 and n are as defined in formula (I); and Y' represents a carbon atom.
Claim 5
Dependent Claim
14 words
The metallocene and its enantiomer as claimed in claim 3, wherein M is hafnium.
Claim 6
Dependent Claim
56 words
The metallocene and its enantiomer as claimed in claim 1, which is a zirconocene represented by formula (III) an its enantiomer: ##STR10## wherein X 1 , X 2 , R 1 , R 2 , R 3 , R 6 , and R 7 are as defined in formula (I); and Y' represents a carbon atom.
Claim 7
Dependent Claim
17 words
The metallocene and its enantiomer as claimed in claim 1, wherein R 1 represents a hydrogen atom.
Claim 8
Dependent Claim
14 words
The metallocene and its enantiomer as claimed in claim 2, wherein M is Zr.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1997-07-11 | 1998-01-10 | 1998-07-12 | $2000.00 | Window Closed / Lapsed |
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