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EP0316155A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

A transition-metal compound having a substituted, bridged bis-cyclopentadienyl ligand

Assignee: JNC Corp
•
Filing: 1988-11-09
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Granted: —
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Expires: 2008-11-09
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Abstract

Abstract Transition-metal compounds hve the formula: in which M is a zirconium or hafnium atom; Y is a silicon or germanium atom; the groups R¹ n -C₅H 4-n and R¹ q -C₅H 4-q each represent an unsubstituted or substituted cyclopentadienyl group, n and q each being 0 or an integer of from 1 to 4 provided that n and q are not simultaneously 0 or 4, the respective substituents R¹ being the same or different and each being a hydrogen atom, a silyl group or a hydrocarbon radical; the respective groups R² are the same or different and each is hydrogen atom or a hydrocarbon radical; and the respective groups X are the same or different and each is hydrogen or halogen atom or a hydrocarbon radical. Catalysts for the stereoregulator polymerization of olefins comprise a compound of formula (I) together with an aluminoxane of the formulae; in which m is an integer of from 4 to 30 and R³ is a hydrocarbyl radical.

Inventors

  • 👤 Shinya Miya
  • 👤 Takashi Yoshimura
  • 👤 Takaya Mise
  • 👤 Hiroshi Yamazaki

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 15:30
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C08; C08F; C08F10/00; C07F17/00; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65912; C08F4/6592; C08F4/65922; C08F4/65927; Y; Y10; Y10S; Y10S526/00; Y10S526/943

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 126 words
Transition-metal compounds of the formula: in which M is a zirconium or hafnium atom; Y is a silicon or germanium atom; the groups R¹ n -C₅H 4-n and R¹ q -C₅H 4-q each represent an unsubstituted or substituted cyclopentadienyl group, n and q each being 0 or an integer of from 1 to 4 provided that n and q are not simultaneously 0 or 4, the respective substituents R¹ being the same or different and each being a hydrogen atom, a silyl group or a hydrocarbon radical; the respective groups R² are the same or different and each is hydrogen atom or a hydrocarbon radical; and the respective groups X are the same or different and each is hydrogen or halogen atom or a hydrocarbon radical.
Claim 2
Dependent Claim 126 words
Transition-metal compounds of the formula: in which M is a zirconium or hafnium atom; Y is a silicon or germanium atom; the groups R¹ n -C₅H 4-n and R¹ q -C₅H 4-q each represent an unsubstituted or substituted cyclopentadienyl group, n and q each being 0 or an integer of from 1 to 4 provided that n and q are not simultaneously 0 or 4, the respective substituents R¹ being the same or different and each being a hydrogen atom, a silyl group or a hydrocarbon radical; the respective groups R² are the same or different and each is hydrogen atom or a hydrocarbon radical; and the respective groups X are the same or different and each is hydrogen or halogen atom or a hydrocarbon radical.
Claim 3
Dependent Claim 77 words
A catalyst for producing a stereoregular olefin polymer, which catalyst comprises as its effective components, (A) a transition-metal compound of formula (I) as defined in claim 1 provided that the site of R¹ on the cyclopentadienyl ring and the nature of R¹ give a configuration wherein any symmetry plane containing M is absent; and (B) an aluminoxane of the formulae: in which m is an integer of from 4 to 30 and R³ is a hydrocarbon radical.

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