Patent US4390671A successfully refreshed from Google Patents.
US4390671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst component for use in the polymerization of α-olefins and a method of using the same
Assignee: Tonen General Sekiyu KK
•
Filing: 1980-09-26
•
Granted: 1983-06-28
•
Expires: 2000-09-26
Abstract
Abstract A supported titanium catalyst component is produced by cogrinding an organo aluminum catalyst component with a supported titanium (IV) halide on a magnesium halide. The resulting supported titanium halide catalyst component, when employed with an organo aluminum catalyst component to form a catalyst system is highly useful for the stereoregular polymerization of α-olefins as well as the copolymerization of α-olefins.
Inventors
- 👤 Masafumi Imai
- 👤 Hiroshi Ueno
- 👤 Naomi Inaba
- 👤 Makoto Yoda
- 👤 Shozo Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:29
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/903; Y10S526/904; Y10S526/906
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
154 words
A process for the polymerization of α-olefins, which comprises subjecting α-olefins to homopolymerization or to copolymerization with ethylene or other α-olefins in the presence of a catalyst comprising: (a) a titanium-containing solid catalyst component which is produced by a process comprising: adding from 0.05 to 5 moles per gram atom titanium of tributylaluminum or said aluminum compound complexed with ethyl benzoate to a supported titanium (IV) halide on magnesium halide; subjecting the mixture to mechanical grinding treatment in the presence of ethylene or propylene to yield a titanium-containing solid catalyst component prepolymerized with from about 0.5 to 100% by weight of polymer; subjecting the prepolymerized titanium-containing solid catalyst component to a further grinding treatment in vacuum, an inert gas or an inert solvent; and recovering the resulting titanium-containing solid catalyst component; and (b) an organo aluminum catalyst component prepared by subjecting an organo aluminum compound and an electron donative compound to a mixing treatment.
Claim 2
Dependent Claim
154 words
A process for the polymerization of α-olefins, which comprises subjecting α-olefins to homopolymerization or to copolymerization with ethylene or other α-olefins in the presence of a catalyst comprising: (a) a titanium-containing solid catalyst component which is produced by a process comprising: adding from 0.05 to 5 moles per gram atom titanium of tributylaluminum or said aluminum compound complexed with ethyl benzoate to a supported titanium (IV) halide on magnesium halide; subjecting the mixture to mechanical grinding treatment in the presence of ethylene or propylene to yield a titanium-containing solid catalyst component prepolymerized with from about 0.5 to 100% by weight of polymer; subjecting the prepolymerized titanium-containing solid catalyst component to a further grinding treatment in vacuum, an inert gas or an inert solvent; and recovering the resulting titanium-containing solid catalyst component; and (b) an organo aluminum catalyst component prepared by subjecting an organo aluminum compound and an electron donative compound to a mixing treatment.
Claim 3
Dependent Claim
21 words
The process as claimed in claim 1, wherein the ethylene or propylene is diluted with an inert gas and/or inert solvent.
Claim 4
Dependent Claim
23 words
The process as claimed in claim 1, wherein the further mechanical grinding treatment is carried out in the presence of an inert gas.
Claim 5
Dependent Claim
191 words
A process for the polymerization of α-olefins, which comprises subjecting α-olefins to homopolymerization or to copolymerization with ethylene or other α-olefins in the presence of a catalyst comprising: (a) a titanium-containing solid catalyst component which is obtained by a process comprising: adding from about 0.05 to 5 moles per gram atom titanium of tributylaluminum or tributylaluminum/ethylbenzoate complex to a supported titanium (IV) halide on magnesium halide, said titanium (IV) halide or magnesium halide comprising a ball milled product of a mixture of magnesium halide, titanium (IV) halide, ethyl benzoate, and hexachloroethane or Si q X 2q+2 wherein q is an integer of from 1 to 10 and X is halogen; subjecting the mixture to mechanical grinding treatment in the presence of ethylene or propylene to yield a titanium-containing solid component prepolymerized with from about 0.5 to 100% by weight of polymer; subjecting the prepolymerized titanium-containing solid component to a further grinding treatment in vacuum, an inert gas or an inert solvent; and recovering the resulting titanium-containing solid catalyst component; and (b) an organo aluminum catalyst component prepared by subjecting an organo aluminum compound and electron donative compond to a mixing treatment.
Claim 6
Dependent Claim
191 words
A process for the polymerization of α-olefins, which comprises subjecting α-olefins to homopolymerization or to copolymerization with ethylene or other α-olefins in the presence of a catalyst comprising: (a) a titanium-containing solid catalyst component which is obtained by a process comprising: adding from about 0.05 to 5 moles per gram atom titanium of tributylaluminum or tributylaluminum/ethylbenzoate complex to a supported titanium (IV) halide on magnesium halide, said titanium (IV) halide or magnesium halide comprising a ball milled product of a mixture of magnesium halide, titanium (IV) halide, ethyl benzoate, and hexachloroethane or Si q X 2q+2 wherein q is an integer of from 1 to 10 and X is halogen; subjecting the mixture to mechanical grinding treatment in the presence of ethylene or propylene to yield a titanium-containing solid component prepolymerized with from about 0.5 to 100% by weight of polymer; subjecting the prepolymerized titanium-containing solid component to a further grinding treatment in vacuum, an inert gas or an inert solvent; and recovering the resulting titanium-containing solid catalyst component; and (b) an organo aluminum catalyst component prepared by subjecting an organo aluminum compound and electron donative compond to a mixing treatment.
Claim 7
Dependent Claim
19 words
The process of claim 4, wherein the ethylene or propylene is diluted with an inert gas and/or inert solvent.
Claim 8
Dependent Claim
21 words
The process of claim 5, wherein the further mechanical grinding treatment is carried out in the presence of an inert gas.
References Cited (Backward Citations)
US4107413A
Cited
US4187196A
Cited
US4107415A
Cited
US4115319A
Cited
US4252929A
Cited
US4250285A
Cited
US4187385A
Cited
US4242231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |