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US5053467A
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Process for preparation of stereoregular polyolefins
Assignee: Tosoh Corp
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Filing: 1987-06-23
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Granted: 1991-10-01
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Expires: 2007-06-23
Abstract
Abstract A catalyst comprising (A) a solid catalyst component obained by reacting a homogeneous solution containing (i) at least one member selected from the group consisting of a combination of metallic magnesium and a hydroxyl organic compound, and an oxygen-containing organic compound of magnesium, (ii) an electron donor compound and (iii) an oxygen-containing organic compound of titanium with (iv) at least one aluminum halide compound and further reacting the obtained solid product with (v) an electron donor compound and (vi) a titanium halide compound, (B) at least one member selected from the group consisting of organic metal compounds of metals of the groups Ia, IIa, IIb, IIIb and IVb of the periodic table, and (C) an electron donor compound, is valuable as the catalyst for preparing a stereoregular polyolefin by homopolymerization or copolymerization of an α-olefin having at least 3 carbon atoms. This catalyst has a high polymerization activity, and the obtained polymer has a high stereoregularity and good powder characteristics.
Inventors
- 👤 Yozo Kondo
- 👤 Mitsuhiro Mori
- 👤 Toshikazu Chikusa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:43
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/42; C08F4/44; C08F4/60; Y; Y10; Y10S; Y10S526/00; Y10S526/909
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
191 words
A process for preparing a stereoregular polyolefin by homopolymerizing or copolymerizing as a main component α-olefin having at least 3 carbon atoms in the presence of a catalyst comprising a transition metal compound and an organometallic compound, wherein a catalyst system comprising (A) a solid catalyst component obtained by reacting a homogeneous solution containing (i) a combination of metallic magnesium and a hydroxyl hydrocarbon compound, (ii) an electron donor compound and (iii) an oxygen-containing organic compound of titanium of the formula (TiO, (OR.sup.5)b)m wherein R is a hydrocarbon group having 1 to 20 carbon atoms, a and b are numbers satisfying the requirements of a ≧0 and b>0 and compatible with the valency of titanium, and m is an integer with (iv) at least one aluminum halide compound and further reacting the obtained solid product with (v) an electron donor compound and (vi) a titanium halide compound in the presence of an inert organic solvent, (B) at least one member selected from the group consisting of organometallic compounds of metals of the groups Ia, IIa, IIb, IIIb and IVb of the periodic table, and (C) an electron donor compound is used.
Claim 2
Dependent Claim
191 words
A process for preparing a stereoregular polyolefin by homopolymerizing or copolymerizing as a main component α-olefin having at least 3 carbon atoms in the presence of a catalyst comprising a transition metal compound and an organometallic compound, wherein a catalyst system comprising (A) a solid catalyst component obtained by reacting a homogeneous solution containing (i) a combination of metallic magnesium and a hydroxyl hydrocarbon compound, (ii) an electron donor compound and (iii) an oxygen-containing organic compound of titanium of the formula (TiO, (OR.sup.5)b)m wherein R is a hydrocarbon group having 1 to 20 carbon atoms, a and b are numbers satisfying the requirements of a ≧0 and b>0 and compatible with the valency of titanium, and m is an integer with (iv) at least one aluminum halide compound and further reacting the obtained solid product with (v) an electron donor compound and (vi) a titanium halide compound in the presence of an inert organic solvent, (B) at least one member selected from the group consisting of organometallic compounds of metals of the groups Ia, IIa, IIb, IIIb and IVb of the periodic table, and (C) an electron donor compound is used.
Claim 3
Dependent Claim
53 words
A process according to claim 1, wherein the aluminum halide compound (iv) is a compound represented by the following general formula: AlR.sup.1.sub.x X.sub.3-n wherein R 1 stands for an alkyl group having 1 to 20 carbon atoms, X stands for a halogen atom, and n is a number in the range of 0>n≧2.
Claim 4
Dependent Claim
21 words
A process according to claim 1, wherein each of the electron donor compounds (ii) and (v) is an organic acid ester.
Claim 5
Dependent Claim
20 words
A process according to claim 1, wherein the electron donor compound as the component (C) is an organic acid ester.
Claim 6
Dependent Claim
22 words
A process according to claim 1, wherein the electron donor compound ass the component (C) is an oxygen-containing organic compound of silicon.
Claim 7
Dependent Claim
20 words
A process according to claim 1, wherein the electron donor compound as the component (C) is a nitrogen-containing organic compound.
Claim 8
Dependent Claim
92 words
A process according to claim 1 wherein the homogeneous solution contains (i) a combination of metallic magnesium and a hydroxyl hydrocarbon compound, (ii) an electron donor compound (vii) at least one silicon compound selected from the group consisting of polysiloxanes and silanes and (iii) an oxygen-containing organic compound of titanium of the formula (TiO, (OR.sup.5)b)m wherein R is a hydrocarbon group having 1 to 20 carbon atoms, a and b are numbers satisfying the requirements of a ≧0 and b>0 and compatible with the valency of titanium, and m is an integer.
Claim 9
Dependent Claim
38 words
A process according to claim 1, wherein the component (A) is a solid catalyst component obtained by reacting said solid product with (viii) a surface active agent, (v) an electron donor compound and (vi) a titanium halide compound.
Claim 10
Dependent Claim
17 words
A process according to claim 8, wherein the surface active agent is a non-ionic surface active agent.
Claim 11
Dependent Claim
27 words
A process according to claim 1, wherein electron donor compounds (ii) and (v) are ethyl benzoate, (vi) is titanium tetrachloride and 1,2-dichloroethane, and (iii) is titanium tetrabutoxide.
References Cited (Backward Citations)
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