EP0594218A1
Expired / Lapsed
EP
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Process for polymerizing olefins
Assignee: Mitsui Chemicals Inc
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Filing: 1987-09-24
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Granted: —
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Expires: 2007-09-24
Abstract
Abstract Process for polymerizing olefins using a catalyst composed of a transition metal catalyst component, a specified concentration of an aluminoxane component and an organoaluminium component. In the process of this invention, the catalyst exhibits excellent polymerization activity with the use of a small concentration of the aluminoxane. The polymerization process gives olefin polymers having a narrow molecular weight distribution, and by the copolymerization of two or more olefins gives olefin copolymers having a narrow molecular weight distribution and a narrow composition distribution.
Inventors
- 👤 Toshiyuki Tsutsui
- 👤 Akinori Toyota
- 👤 Norio Kashiwa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 20:03
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16; C08F10/00; C08F110/00; C08F110/02; C08F210/18; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65912; C08F4/65916; C08F4/6592; C08F4/65922
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
150 words
A process for polymerizing olefins, which comprises polymerizing or copolymerizing olefins in the presence of a catalyst composed of (A) a solid catalyst component composed of a compound of a transition metal which compound is represented by formula (I) wherein R 1 represents a cycloalkadienyl group, R 2 , R 3 and R 4 are identical or different and each represents a cycloalkadienyl group, an aryl group, an alkyl group, an aralkyl group, a halogen atom or a hydrogen atom, Me represents zirconium, titanium or hafnium, k is 1, 2, 3, or 4, 1, m and n are each 0, 1, 2 or 3, and k + 1+m+n=4, and which compound is not supported on an inorganic carrier, (B) an aluminoxane in a concentration of not more than 3 milligram-atoms/litre as aluminum atom in the reaction system, and (C) an organoaluminium compound having a hydrocarbon group other than n-alkyl groups.
Claim 2
Dependent Claim
150 words
A process for polymerizing olefins, which comprises polymerizing or copolymerizing olefins in the presence of a catalyst composed of (A) a solid catalyst component composed of a compound of a transition metal which compound is represented by formula (I) wherein R 1 represents a cycloalkadienyl group, R 2 , R 3 and R 4 are identical or different and each represents a cycloalkadienyl group, an aryl group, an alkyl group, an aralkyl group, a halogen atom or a hydrogen atom, Me represents zirconium, titanium or hafnium, k is 1, 2, 3, or 4, 1, m and n are each 0, 1, 2 or 3, and k + 1+m+n=4, and which compound is not supported on an inorganic carrier, (B) an aluminoxane in a concentration of not more than 3 milligram-atoms/litre as aluminum atom in the reaction system, and (C) an organoaluminium compound having a hydrocarbon group other than n-alkyl groups.
Claim 3
Dependent Claim
68 words
A process according to claim 1 wherein the aluminoxane is represented by formula (II) wherein R is a hydrocarbon group, X is a halogen atom, and a and b, independently from each other, represent a number of 0 to 80 with the proviso that a and are not simultaneously zero, or by formula (III) wherein R, X, a and b are as defined with regard to formula (II).
Claim 4
Dependent Claim
28 words
A process according to claim 1 or 2 wherein the organic group of the organoaluminum compound is a branched alkyl group, a cycloalkyl group or an aryl group.
References Cited (Backward Citations)
US4552859A
Cited
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