Patent EP0585512A1 successfully refreshed from Google Patents.
EP0585512A1
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EP
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Process for the preparation of an olefin polymerization catalyst component
Assignee: TotalEnergies Onetech Belgium SA
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Filing: 1992-08-31
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Granted: —
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Expires: 2012-08-31
Abstract
Abstract The present invention relates to a process for the preparation of a component of a catalyst for the (co)polymerization of alpha-olefins, and more particularly to a process for the preparation of a new type of supported Ziegler-Natta catalyst. More particularly the present invention concerns a process for the preparation of a supported Ziegler-Natta catalyst which comprises metallocene polymerization sites in addition to the usual polymerization sites.
Inventors
- 👤 Patrick Brems
- 👤 Guy Debras
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 14:39
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65904; C08F4/65912; C08F4/65916
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
169 words
Process for preparing an olefin polymerization catalyst component which comprises the step of : - contacting a supported Ziegler-Natta catalyst component comprising a halogen derivative of a transition metal (Me) of Group IVb supported on a finely divided halogen derivative of Mg with a solution of an organometallic compound of general formula L x E y R z wherein L is an organic ligand which comprises a cyclopentadienyl, an indenyl, a fluorenyl or substituted derivates thereof, E is a metallic, non-metallic or amphoteric element of group IA, IIA, IIIA, IVA, or VA of the periodic table, R is an aliphatic, cycloaliphatic, aromatic, polyaromatic or heterocyclic group. and wherein x, y, z are integers, the value of which is comprised between 0 and 4, preferably x=1, y=1 and z=0 or 3 under reaction conditions comprising a temperature comprised between about -80°C and 220°C, - forming Me-L bonds in replacement of Me-Hal bonds so as to obtain Me/L ratio comprised between 0.15 and 18. - recovering the catalyst component so obtained.
Claim 2
Dependent Claim
16 words
Process according to claim 1, wherein L is a cyclopendienyl or a trialkylsilyl substituted derivative thereof.
Claim 3
Dependent Claim
15 words
Process according to claim 1 wherein E is selected from Na, Si, Sn or P.
Claim 4
Dependent Claim
18 words
Process according to claim 1 wherein R is a hydrocarbyl radical having from 1 to 4 carbon atoms.
Claim 5
Dependent Claim
14 words
Process according to claim 1 wherein L x E y R z is cyclopentadienyltrimethylsilane.
Claim 6
Dependent Claim
17 words
Process according to claims 1 to 5 wherein the Me/L ratio is comprised between 1 and 12.
Claim 7
Dependent Claim
16 words
Process according to claims 1 to 6 wherein the transition metal of Group IVb is titanium.
Claim 8
Dependent Claim
27 words
Process according to claim 1 to 7 wherein the substitution reaction is performed at a temperature comprised between -80°C and 220°C and preferably between 50°C and 100°C.
Claim 9
Dependent Claim
187 words
Process for (co)polymerization alpha-olefins in the presence of a catalyst system comprising : a) a catalyst component prepared by - contacting a supported Ziegler-Natta catalyst component comprising a halogen derivative of a transition metal (Me) of Group IVb supported on a finely divided of a halogen derivative of Mg with a solution of an organometallic compound of general formula L x E y R z wherein L is an organic ligand which comprises a cyclopentadienyl, an indenyl, a fluorenyl or substituted derivates thereof, E is a metallic, non-metallic or amphoteric element of group IA, IIA, IIIA, IVA, or VA of the periodic table, R is an aliphatic, cycloaliphatic, aromatic, polyaromatic or heterocyclic group. and wherein x, y, z are integers, the value of which is comprised between 0 and 4, preferably x=1, y=1 and z=0 or 3 under reaction conditions comprising a temperature comprised between about -80°C and 200°C, - forming Me-L bonds in replacement of Me-Hal bonds so as to obtain Me/L ratio comprised between 0.15 and 18. - recovering the catalyst component so obtained. b) an organo-aluminum compound as cocatalyst c) optionally an external electron-donor
Claim 10
Dependent Claim
22 words
Process according to claim 9 wherein the catalyst component (a) is prepared in accordance with any one of claims 2 to 8.
Claim 11
Dependent Claim
23 words
Process according to claims 9 or 10 wherein the co-monomers are selected from alpha-olefins or diolefins having from 2 to 20 carbon atoms.
References Cited (Backward Citations)
No citation records indexed.
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