US5244989A
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Method for producing a stereospecific polyolefin
Assignee: Tosoh Corp
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Filing: 1992-02-26
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Granted: 1993-09-14
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Expires: 2012-02-26
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 (i) a homogeneous solution prepared by reacting (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, with 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, reacting to this solid product (iii) an electron-donative compound and (iv) a titanium halide compound to obtain a solid component, and further reacting to this solid component (v) silicon tetrachloride and/or an alkyl-substituted product of silicon tetrachloride, (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.
Inventors
- 👤 Daiji Hara
- 👤 Morihiko Sato
- 👤 Mitsuhiro Mori
- 👤 Yozo Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:50
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
173 words
A method for producing a stereospecific polyolefin comprising polymerizing an α-olefin having at least three carbon atoms in the presence of a catalyst comprising a transition metal compound and an organometallic compound, wherein said catalyst comprises: (A) a solid catalyst component prepared by reacting: (i) a homogeneous solution prepared by reacting (i-1) magnesium and a hydroxylated organic compound, and at least one of (i-2) an oxygen-containing organic compound of titanium and (i-3) an oxygen-containing organic compound of silicon and at least one of an oxygen-containing organic compound of aluminum and a boron compound, with (ii) at least one aluminum halide compound to obtain a solid product, reacting to this solid product (iii) an electron-donative compound and (iv) a titanium halide compound to obtain a solid component, and further reacting to this solid component (v) silicon tetrachloride and/or an alkyl-substituted product of silicon tetrachloride, (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
Independent Claim
173 words
A method for producing a stereospecific polyolefin comprising polymerizing an α-olefin having at least three carbon atoms in the presence of a catalyst comprising a transition metal compound and an organometallic compound, wherein said catalyst comprises: (A) a solid catalyst component prepared by reacting: (i) a homogeneous solution prepared by reacting (i-1) magnesium and a hydroxylated organic compound, and at least one of (i-2) an oxygen-containing organic compound of titanium and (i-3) an oxygen-containing organic compound of silicon and at least one of an oxygen-containing organic compound of aluminum and a boron compound, with (ii) at least one aluminum halide compound to obtain a solid product, reacting to this solid product (iii) an electron-donative compound and (iv) a titanium halide compound to obtain a solid component, and further reacting to this solid component (v) silicon tetrachloride and/or an alkyl-substituted product of silicon tetrachloride, (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 3
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 4
Dependent Claim
72 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 (OR 4 ) q ] n wherein R 4 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 agreeable with the valence of Ti, and n is an integer.
Claim 5
Dependent Claim
179 words
The method according to claim 1, wherein the oxygen-containing organic compound of silicon for the reactant (i-3) is a compound of the formula R 8 .sub. Si(OR 9 ) t X 4- (s+t) wherein each of R 8 and R 9 is a hydrocarbon group having from 1 to 20, or a hydrogen atom, 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(OR 2 ) d X 3-d wherein R 2 is a hydrocarbon group having from 1 to 20 carbon atoms, d is a number of 0<d≦3, and X is a halogen atom, and the boron compound for the reactant (i-3) is a compound of the formula R 3 e B(OR 4 ) g X 3- (e+g) wherein each of R 3 and R 4 is a hydrocarbon group having from 1 to 20, or a hydrogen atom, e and g are numbers satisfying 0≦e≦3, 0≦g3 and 0≦e+g≦3, and X is a halogen atom.
Claim 6
Dependent Claim
52 words
The method according to claim 1, wherein the aluminum halide compound for the reactant (ii) is a compound of the formula AlR 5 r X 3-r wherein R 5 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 7
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 8
Dependent Claim
48 words
The method according to claim 1, wherein the reactant (iv) is a compound of the formula Ti(OR 6 ) f X 4-f wherein R 6 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 9
Dependent Claim
43 words
The method according to claim 1, wherein the reactant (v) is a silicon compound of the formula R 7 n l 4-n wherein R 7 is an alkyl group having from 1 to 20 carbon atoms, and n is a number of 0≦n<4.
Claim 10
Dependent Claim
59 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 AIR 10 3 wherein R 10 is a linear or branched alkyl group having from 1 to 10 carbon atoms, C 1 -C 20 alkyl metal halides and C 1 -C 20 alkyl metal alkoxides.
Claim 11
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 12
Dependent Claim
21 words
The method according to claim 1, wherein the reactions with the reactant (iv) and (v) are repeated one or more times.
Claim 13
Dependent Claim
81 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═CH 2 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.
Claim 14
Dependent Claim
44 words
The method according to claim 1, wherein homogeneous solution (i) is prepared by reacting (i-1) magnesium and a hydroxylated organic compound and (i-3) an oxygen-containing organic compound of silicon and at least one of an oxygen-containing organic compound of aluminum and a boron compound.
References Cited (Backward Citations)
EP0060443A1
Cited
US4472521A
Cited
US4748221A
Cited
EP0275317A1
Cited
US5053467A
Cited
US4904630A
Cited
EP0376145A2
Cited
US5077250A
Cited
EP0474157A1
Cited
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