EP0474157A1
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Method for producing a stereospecific polyolefin
Assignee: Tosoh Corp
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Filing: 1991-09-02
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Granted: —
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Expires: 2011-09-02
Abstract
Abstract A method for producing a stereospecific polyolefin in the presence of a catalyst comprising a transition metal compound and an organometallic compound, wherein a catalyst system is used which comprises: (A) a solid catalyst component prepared by reacting a homogeneous solution containing (i-1) magnesium and a hydroxylated organic compound, (i-2) an oxygen-containing organic compound of titanium and/or (i-3) an oxygen-containing organic compound of silicon and an oxygen-containing organic compound of aluminum and/or a boron compound, with (ii) at least one aluminum halide compound to obtain a solid product, and further reacting to this solid product (iii) an electron-donative compound, (iv) a titanium halide compound, and (v) ethylene and/or an α-olefin having at least 3 carbon atoms, (B) at least one member selected from the group consisting of organometallic compounds of Groups IA, IIA, IIB, IIIB and IVB of the Periodic Table, and (C) an electron-donative compound. A highly stereospecific polymer having good configuration of particles can be obtained in good yield by the method of the present invention.
Inventors
- 👤 Daiji Hara
- 👤 Mitsuhiro Mori
- 👤 Yozo Kondo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 22:49
CPC Classifications
C; C08; C08F; C08F4/00; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/903; Y10S526/904
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
146 words
A method for producing a stereospecific polyolefin in the presence of a catalyst comprising a transition metal compound and an organometallic compound, wherein a catalyst system is used which comprises: (A) a solid catalyst component prepared by reacting a homogeneous solution containing (i-1) magnesium and a hydroxylated organic compound, (i-2) an oxygen-containing organic compound of titanium and/or (i-3) an oxygen-containing organic compound of silicon and an oxygen-containing organic compound of aluminum and/or a boron compound, with (ii) at least one aluminum halide compound to obtain a solid product, and further reacting to this solid product (iii) an electron-donative compound, (iv) a titanium halide compound, and (v) ethylene and/or an α-olefin having at least 3 carbon atoms, (B) at least one member selected from the group consisting of organometallic compounds of Groups IA, IIA, IIB, IIIB and IVB of the Periodic Table, and (C) an electron-donative compound.
Claim 2
Dependent Claim
20 words
The method according to Claim 1, wherein the hydroxylated organic compound is an alcohol, a phenol or an organic silanol.
Claim 3
Dependent Claim
69 words
The method according to Claim 1, wherein the oxygen-containing organic compound of titanium for the reactant (i-2) is a compound of the formula [O p Ti u (OR¹) q ] n wherein R¹ is a hydrocarbon group having from 1 to 20 carbon atoms, p, q and u are numbers satisfying p≧0, q>0 and u≧1, and they are agreable with the valence of Ti, and n is an integer.
Claim 4
Dependent Claim
160 words
The method according to Claim 1, wherein the oxygen-containing organic compounds of silicon for the reactant (i-3) is a compound of the formula R⁵ s Si(OR⁶) t X 4-(s+t) wherein each of R⁵ and R⁶ is a hydrocarbon group having from 1 to 20, s and t represent numbers satisfying 0≦s≦3, 1≦t≦4 and 1≦s + t≦4, and X is a halogen atom, the oxygen-containing organic compound of aluminum for the reactant (i-3) is a compound of the formula Al(OR²) m X 3-m wherein R² is a hydrocarbon group having from 1 to 20 carbon atoms, m is a number of 0<m≦3, and X is a halogen atom, and the boron compound for the reactant (i-3) is a compound of the formula R³ a B(OR⁴) b X 3-(a+b) wherein each of R³ and R⁴ is a hydrocarbon group having from 1 to 20, m and n are numbers satisfying 0≦a≦3, 0≦b≦3 and 0≦a + b≦3, and X is a halogen atom.
Claim 5
Dependent Claim
50 words
The method according to Claim 1, wherein the aluminum halide compound for the reactant (ii) is a compound of the formula AlR⁷ r X 3-r wherein R⁷ is a hydrocarbon group having from 1 to 20 carbon atoms, X is a halogen atom, and r is a number of 0<r≦2.
Claim 6
Dependent Claim
41 words
The method according to Claim 1, wherein the reactant (iii) is an ether, an ester, a ketone, a phenol, an amine, an amide, an imine, a nitrile, a phosphine, a phosphite, a stibine, an arsine, a phosphoryl amide or an alcoholate.
Claim 7
Dependent Claim
45 words
The method according to Claim 1, wherein the reactant (iv) is a compound of the formula Ti(OR⁸) f X 4-f wherein R⁸ is a hydrocarbon group having from 1 to 20 carbon atoms, X is a halogen atom, and f is a number of 0≦f<4.
Claim 8
Dependent Claim
40 words
The method according to Claim 1, wherein the reactant (v) is a compound of the formula R-CH=CH₂ wherein R is hydrogen or a linear or branched or cyclic, substituted or unsubstituted alkyl group having from 1 to 10 carbon atoms.
Claim 9
Dependent Claim
50 words
The method according to Claim 1, wherein the catalyst component (B) is selected from the group consisting of a trialkyl aluminum of the formula AlR⁹₃ wherein R⁹ is a linear or branched alkyl group having from 1 to 10 carbon atoms, C₁-C₂₀ alkyl metal halides and C₁-C₂₀ alkyl metal alkoxides.
Claim 10
Dependent Claim
26 words
The method according to Claim 1, wherein the electron-donative compound (C) is an organic ester, an oxygen-containing organic compound of silicon, or a nitrogen-containing organic compound.
Claim 11
Dependent Claim
22 words
The method according to Claim 1, wherein the reaction with the reactant (iv) is conducted in a divided fashion in multi stages.
Claim 12
Dependent Claim
80 words
The method according to Claim 1, wherein prior to the main polymerization, a small amount of an organometallic compound component may be added and it is polymerized with a small amount of an α-olefin and/or ethylene of the formula R-CH=CH₂ wherein R is a linear or branched or cyclic substituted or unsubstituted alkyl group having from 1 to 10, particularly from 1 to 8, carbon atoms, or a hydrogen atom, so that it is used in a preliminarily polymerized form.
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