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EP0436328A2
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Method for polymerizing alpha-olefin
Assignee: Mitsui Toatsu Chemicals Inc
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Filing: 1990-12-13
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Granted: —
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Expires: 2010-12-13
Abstract
Abstract A method for polymerizing an alpha -olefin comprises the step of polymerizing an alpha -olefin in the presence of a catalytic system which comprises: (a) a transition metal catalytic component which comprises a titanium compound free of ligand consisting of hydrocarbon residues; (b) a titanium, zirconium or hafnium compound having, as a ligand, at least one cyclopentadiene, or polycyclic condensed-ring compound of cyclopentadiene, or alkyl-substituted derivatives thereof; and (c) an organic aluminum compound. The method makes it possible to produce highly stereoregular poly( alpha -olefins) having a relatively wider molecular weight distributions and thus has high industrial value.
Inventors
- 👤 Tadashi Asanuma
- 👤 Kiyomi Morita
- 👤 Tutomu Iwatani
- 👤 Katsumi Takeuchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 14:21
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; C08F4/6592; C08F4/65922; C08F4/65925
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
73 words
A method for polymerizing an α -olefin comprising the step of polymerizing the α -olefin in the presence of a catalytic system which comprises: (a) a transition metal catalytic component which comprises a titanium compound free of ligand consisting of hydrocarbon residues; (b) a titanium, zirconium or hafnium compound having, as a ligand, at least one cyclopentadiene, or polycyclic condensed-ring compound of cyclopentadiene, or alkyl-substituted derivatives thereof; and (c) an organic aluminum compound.
Claim 2
Dependent Claim
52 words
The method of claim 1 wherein the titanium, zirconium or hafnium compound having, as a ligand, at least one cyclopentadiene, or polycyclic condensed-ring compound of cyclopentadiene, or alkyl-substituted derivatives thereof (b) is contained in the transition metal catalytic component which comprises a titanium compound free of ligand consisting of hydrocarbon residues (a).
Claim 3
Dependent Claim
31 words
The method of claim 1 or claim 2 wherein the titanium compound free of ligand consisting of hydrocarbon residues included in the transition metal catalytic compound (a) is a titanium halide.
Claim 4
Dependent Claim
33 words
The method of claim 1 wherein the transition metal catalytic component which comprises a titanium compound free of ligand consisting of hydrocarbon residues (a) is a titanium compound supported by a magnesium halide.
Claim 5
Independent Claim
40 words
The method of any one of claims 1 to 4 wherein the titanium, zirconium, or hafnium compound having, as a ligand, at least one cyclopentadiene, or polycyclic condensed-ring compound of cyclopentadiene, or alkyl-substituted derivatives thereof (b) is dicyclopentadienyl titanium dichloride.
Claim 6
Dependent Claim
55 words
The method of claim 1 wherein the transition metal catalytic component which comprises a titanium compound free of ligand consisting of hydrocarbon residues (a) and the titanium, zirconium or hafnium compound having, as a ligand, at least one cyclopentadiene, or polycyclic condensed-ring compound of cyclopentadiene, or alkyl-substituted derivatives thereof are supported by a magnesium halide.
Claim 7
Dependent Claim
39 words
The method of claim 6 wherein the titanium compound having, as a ligand, at least one cyclopentadiene, or polycyclic condensed-ring compound of cyclopentadiene, or alkyl-substituted derivatives thereof (b) is used after it is pulverized together with a magnesium halide.
Claim 8
Dependent Claim
85 words
The method of claim 1 wherein a product obtained by co-pulverizing a magnesium halide, a diester of an aromatic dicarboxylic acid, a tetravalent titanium compound having at least one halogen atom and the titanium, zirconium or hafnium compound having, as a ligand, at least one cyclopentadiene, or polycyclic condensed-ring compound of cyclopentadiene, or alkyl-substituted derivatives thereof (b) ; and then heat-treating the co-pulverized product in the presence of a hydrocarbon compound or a halogenated hydrocarbon compound is used in combination with an organic aluminum compound.
Claim 9
Dependent Claim
88 words
The method of claim 1 wherein a product obtained by co-pulverizing a magnesium halide, a diester of an aromatic dicarboxylic acid, a tetravalent titanium compound having at least one halogen atom, a halogenated hydrocarbon compound and the titanium, zirconium or hafnium compound having, as a ligand, at least one cyclopentadiene, or polycyclic condensed-ring compound of cyclopentadiene, or alkyl-substituted derivatives thereof (b); and then heat-treating the co-pulverized product in the presence of a hydrocarbon compound or a halogenated hydrocarbon compound is used in combination with an organic aluminum compound.
Claim 10
Dependent Claim
98 words
The method of claim 1 wherein a catalyst slurry is used, the slurry being prepared by adding a solution of the titanium compound having, as a ligand, at least one cyclopentadiene, or polycyclic condensed-ring compound of cyclopentadiene, or alkyl-substituted derivatives thereof (b) in a solvent to a slurry of the transition metal catalytic component which comprises a titanium compound free of ligand consisting of hydrocarbon residues (a) dispersed in a hydrocarbon solvent which does not dissolve the titanium compound having, as a ligand, at least one cyclopentadiene, or polycyclic condensed-ring compound of cyclopentadiene, or alkyl-substituted derivatives thereof (b).
Claim 11
Independent Claim
112 words
A method for polymerizing an α -olefin in the presence of a catalyst system consisting of transition metal catalytic component which comprises a titanium compound free of ligand consisting of hydrocarbon residues (a) supported by a magnesium halide and an organic aluminum compound wherein the α -olefin is first polymerized in the absence of a titanium, zirconium or hafnium compound having, as a ligand, at least one cyclopentadiene, or polycyclic condensed-ring compound of cyclopentadiene, or alkyl-substituted derivatives thereof and then it is further polymerized in the presence of a titanium, zirconium or hafnium compound having, as a ligand, at least one cyclopentadiene, or polycyclic condensed-ring compound of cyclopentadiene, or alkyl-substituted derivatives thereof.
References Cited (Backward Citations)
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