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EP0057352A2
Expired / Lapsed
EP
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Process for producing polyolefin
Assignee: Mitsubishi Chemical Corp
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Filing: 1982-01-13
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Granted: —
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Expires: 2002-01-13
Abstract
Abstract A polyolefin is producing by polymerizing ethylene or copolymerizing ethylene and the other a-olefin at 50 to 100 °C in a hydrocarbon solvent in the presence of a catalyst system of an organoaluminium compound and a transition metal compound component which is a solid catalytic component containing a magnesium compound and a titanium compound under the condition (a) two step polymerizations of a first polymerization step and a second polymerization step in the presence of a reaction mixture obtained by said first polymerization step; (b) a polymerization in the presence of hydrogen at a molar ratio of H 2 to C 2 H 4 (vapor phase) of 0.01-0.8 to produce a polymer A having a viscosity average molecular weight of 2 x 10 5 -7 x 10° at a ratio of 30 to 70 wt.% based on the total polymer in one of said first or second polymerization step and a polymerization in the presence of hydrogen at a molar ratio of H 2 to C 2 H 4 (vapor phase) of 1.5-15 to produce a polymer B having a viscosity average molecular weight of 1 x 10 4 -4 x 10 4 at a ratio of 70 to 30 wt.% based on the total polymer in the other polymerization step to give a ratio of a viscosity average molecular weight of polymer A to a viscosity average molecular weight of polymer B of 15 to 55; (c) said production of said polymer A as a copolymer of ethylene and other a-olefin and said production of said polymer B as a homopolymer of ethylene or a copolymer of ethylene and the other a-olefin; and (d) said production of the total polymer as a polymer having a melt index of less than 0.5 g/10 min.
Inventors
- 👤 Toru Tanaka
- 👤 Atsushi Murakami
- 👤 Osamu Kishiro
- 👤 Nobuaki Gohko
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:32
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
307 words
1) A process for producing a polyolefin which comprises polymerizing ethylene or copolymerizing ethylene and the other a-olefin at 50 to 100°C in a hydrocarbon solvent in the presence of a catalyst system of an organoaluminum compound and a transition metal compound component which is a solid catalytic component containing a magnesium compound and a titanium compound under the condition (a) two step polymerizations of a first polymerization step and a second polymerization step in the presence of a reaction mixture obtained by said first polymerization step; (b) a polymerization in the presence of hydrogen at a molar ratio of H 2 to C 2 H 4 (vapor phase) of 0.01 - 0.8 to produce a polymer A having a viscosity average molecular weight of 2 x 1 0 5 - 7 x 10 5 at a ratio of 30 to 70 wt.% based on the total polymer in one of said first or second polymerization step and a polymerization in the presence of hydrogen at a molar ratio of H 2 to C 2 H 4 (vapor phase) of 1. 5 - 15 to produce a polymer B having a viscosity average molecular weight of 1 x 10 4 - 4 x 10 4 at a ratio of 70 to 30 wt. % based on the total polymer in the other polymerization step to give a ratio of a viscosity average molecular weight of polymer A to a viscosity average molecular weight of polymer B of 15 to 55; (c) said production of said polymer A as a copolymer of ethylene and other a-olefin and said production of said polymer B as a homopolymer of ethylene or a copolymer of ethylene and the other a-olefin; and (d) said production of the total polymer as a polymer having a melt index of less than 0.5 g/10 min.
Claim 2
Dependent Claim
307 words
1) A process for producing a polyolefin which comprises polymerizing ethylene or copolymerizing ethylene and the other a-olefin at 50 to 100°C in a hydrocarbon solvent in the presence of a catalyst system of an organoaluminum compound and a transition metal compound component which is a solid catalytic component containing a magnesium compound and a titanium compound under the condition (a) two step polymerizations of a first polymerization step and a second polymerization step in the presence of a reaction mixture obtained by said first polymerization step; (b) a polymerization in the presence of hydrogen at a molar ratio of H 2 to C 2 H 4 (vapor phase) of 0.01 - 0.8 to produce a polymer A having a viscosity average molecular weight of 2 x 1 0 5 - 7 x 10 5 at a ratio of 30 to 70 wt.% based on the total polymer in one of said first or second polymerization step and a polymerization in the presence of hydrogen at a molar ratio of H 2 to C 2 H 4 (vapor phase) of 1. 5 - 15 to produce a polymer B having a viscosity average molecular weight of 1 x 10 4 - 4 x 10 4 at a ratio of 70 to 30 wt. % based on the total polymer in the other polymerization step to give a ratio of a viscosity average molecular weight of polymer A to a viscosity average molecular weight of polymer B of 15 to 55; (c) said production of said polymer A as a copolymer of ethylene and other a-olefin and said production of said polymer B as a homopolymer of ethylene or a copolymer of ethylene and the other a-olefin; and (d) said production of the total polymer as a polymer having a melt index of less than 0.5 g/10 min.
Claim 3
Dependent Claim
133 words
2) The process for producing a polyolefin according to Claim 1 wherein said transition metal compound component is a reaction product selected from the group consisting of (a) a reaction product obtained by reacting an oxygen-containing organomagnesium compound and an oxygen-containing organotitanium compound with an aluminum halide compound ; (b) a reaction product obtained by reacting an oxygen-containing organomagnesium compound and an oxygen-containing organotitanium compound with a silicon halide compound; (c) a reaction product obtained by reacting an oxygen-containing organomagnesium compound with a titanium halide compound; (d) a reaction product obtained by reacting magnesium dihalide, an oxygen-containing organomagnesium compound, an oxygen-containing organotitanium compound with an aluminum halide compound; and (e) a reaction product obtained by reacting a titanium compound with a solid obtained by treating a magnesium-containing solid with an oxygen-containing organoboron compound.
Claim 4
Dependent Claim
19 words
3) The process for producing a polyolefin according to Claim 1 wherein said organoaluminum compound is an alkylaluminum chloride.
Claim 5
Dependent Claim
25 words
4) The process for producing a polyolefin according to Claim 1 wherein said organoaluminum compound is a mixture of an alkylaluminum chloride and a trialkylaluminum.
Claim 6
Dependent Claim
40 words
5) The process for producing a polyolefin according to Claim 1 wherein said mixture of an alkylaluminum chloride and a trialkylaluminum is formed to give an atomic ratio of Cl to Al of 0.1 to 1. 5 as the components.
Claim 7
Dependent Claim
85 words
6) A process for producing a polyolefin which comprises polymerizing ethylene or copolymerizing ethylene and the other a-olefin in the presence of a catalyst system of an organoaluminum compound and a transition metal compound component as a reaction product obtained by reacting an oxygen-containing organomagnesium compound with a titanium halide compound or a reaction product obtained by reacting an oxygen-containing organomagnesium compound, an oxygen-containing organotitanium compound with an aluminum halide compound wherein said organoaluminum compound is a mixture of a trialkylaluminum and an alkylaluminum chloride.
Claim 8
Dependent Claim
85 words
6) A process for producing a polyolefin which comprises polymerizing ethylene or copolymerizing ethylene and the other a-olefin in the presence of a catalyst system of an organoaluminum compound and a transition metal compound component as a reaction product obtained by reacting an oxygen-containing organomagnesium compound with a titanium halide compound or a reaction product obtained by reacting an oxygen-containing organomagnesium compound, an oxygen-containing organotitanium compound with an aluminum halide compound wherein said organoaluminum compound is a mixture of a trialkylaluminum and an alkylaluminum chloride.
Claim 9
Dependent Claim
40 words
7) The process for producing a polyolefin according to Claim 6 wherein said mixture of a trialkylaluminum and an alkylaluminum chloride is formed to give an atomic ratio of C1 to Al of 0.1 1 to 1.5 as the components.
Claim 10
Dependent Claim
31 words
8) The process for producing a polyolefin according to Claim 6 wherein said reaction product is a reaction product obtained by reacting an oxygen-containing organomagnesium compound with a titanium halide compound.
Claim 11
Dependent Claim
35 words
9) The process for producing a polyolefin according to Claim 6 wherein said reaction product is a reaction product obtained by reacting an oxygen-containing organomagnesium compound, an oxygen-containing organotitanium compound with an aluminum halide compouiid.
Claim 12
Dependent Claim
81 words
10) The process for producing a polyolefin according to Claim 8 wherein said oxygen-containing organomagnesium compound is a compound having the formula wherein R represents an alkyl, aryl or cycloalkyl group; X 1 represents a halogen atom; and m is 1 or 2; and said oxygen-containing organotitanium compound is a compound having the formula wherein X 5 represents a halogen atom; R 5 represents an alkyl, aryl or cycloalkyl group; and r is selected in a range of 1 to 4.
Claim 13
Dependent Claim
31 words
11) The process for producing a polyolefin according to Claim 10 wherein an atomic ratio of Ti to Mg in said reaction product is in a range of 0.1 to 100.
Claim 14
Dependent Claim
114 words
12) The process for producing a polyolefin according to Claim 9 wherein said oxygen-containing organomagnesium is a compound having the formula wherein R represents an alkyl, aryl or cycloalkyl group; X represents a halogen atom; and m is 1 or 2; and said oxygen-containing organotitanium compound is a compound having the formula wherein R 2 represents an alkyl, aryl or cycloalkyl group; X 2 represents a halogen atom; and n is selected in a range of 1 to 4; and said aluminum halide compound is a compound having the formula wherein R 3 represents an alkyl, aryl or cycloalkyl group; X 3 represents a halogen atom and p is 0 < p < 3.
Claim 15
Dependent Claim
31 words
13) The process for producing a polyolefin according to Claim 12 wherein an atomic ratio of Mg to Ti in said reaction product is in a range of 1 to 4.
Claim 16
Dependent Claim
64 words
14) The process for producing a polyolefin according to Claim 12 wherein a ratio of X to (OR + OR 2 ) as ratio of total halogen atoms in said magnesium compound, said titanium compound and said aluminum compound to the sum of OR groups and OR groups in said magnesium compound and said titanium compound is in a range of 1 to 4.
References Cited (Backward Citations)
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