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US4220745A
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Process for polymerization of α-olefins
Assignee: Mitsui Toatsu Chemicals Inc
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Filing: 1978-12-26
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Granted: 1980-09-02
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Expires: 1998-12-26
Abstract
Abstract Stereospecific polymerization of alpha -olefins is carried out with use of a catalyst comprising an activated titanium component obtained by treating products of copulverization of magnesium halides and aromatic orthocarboxylic acid esters with titanium halides, an organoaluminum compound and an electron donative compound. alpha -Olefin polymers of high stereospecificity are thus obtained with a high polymerization activity.
Inventors
- 👤 Takao Tanaka
- 👤 Tadashi Asanuma
- 👤 Tetsunosuke Shiomura
- 👤 Akira Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:43
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/02; C08F4/022; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
63 words
In a process for the stereospecific polymerization of α-olefins with use of a catalyst comprising a titanium compound supported on a carrier, an organoaluminum compound and an electron donative compound, the improvement which comprises using an activated titanium compound obtained by contact treatment of magnesium halide and an aromatic orthocarboxylic acid ester with titanium halide as the titanium compound supported on a carrier.
Claim 2
Dependent Claim
63 words
In a process for the stereospecific polymerization of α-olefins with use of a catalyst comprising a titanium compound supported on a carrier, an organoaluminum compound and an electron donative compound, the improvement which comprises using an activated titanium compound obtained by contact treatment of magnesium halide and an aromatic orthocarboxylic acid ester with titanium halide as the titanium compound supported on a carrier.
Claim 3
Dependent Claim
47 words
The process of claim 1 wherein said aromatic orthocarboxylic acid ester is represented by the formula, ##STR4## wherein R 1 is an aromatic hydrocarbon radical and each of R 2 , R 3 and R 4 which may be the same or different is a hydrocarbon radical.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said magnesium halide is magnesium chloride.
Claim 5
Dependent Claim
67 words
In a process for the stereospecific polymerization of α-olefins with use of a catalyst comprising a titanium compound supported on a carrier, an organoaluminum compound and an electron donative compound, the improvement which comprises using an activated titanium compound obtained by contact treatment of magnesium halide, an aromatic orthocarboxylic acid ester and an aluminum halide with a titanium halide as said titanium compound supported on a carrier.
Claim 6
Dependent Claim
67 words
In a process for the stereospecific polymerization of α-olefins with use of a catalyst comprising a titanium compound supported on a carrier, an organoaluminum compound and an electron donative compound, the improvement which comprises using an activated titanium compound obtained by contact treatment of magnesium halide, an aromatic orthocarboxylic acid ester and an aluminum halide with a titanium halide as said titanium compound supported on a carrier.
Claim 7
Dependent Claim
47 words
The process of claim 4 wherein said aromatic orthocarboxylic acid ester is represented by the formula, ##STR5## wherein R 1 is an aromatic hydrocarbon radical and each of R 2 , R 3 and R 4 which may be the same or different is a hydrocarbon radical.
Claim 8
Dependent Claim
19 words
The process of claim 4 wherein said magnesium halide is magnesium chloride and said aluminum halide is aluminum chloride.
Claim 9
Dependent Claim
70 words
In a process for the stereospecific polymerization of α-olefins with use of a catalyst comprising a titanium compound supported on a carrier, an organoaluminum compound and an electron donative compound, the improvement which comprises using an activated titanium compound obtained by contact treatment of magnesium halide, an aromatic orthocarboxylic acid ester and an aluminum halide-organic acid ester complex with a titanium halide as said titanium compound supported on a carrier.
Claim 10
Dependent Claim
70 words
In a process for the stereospecific polymerization of α-olefins with use of a catalyst comprising a titanium compound supported on a carrier, an organoaluminum compound and an electron donative compound, the improvement which comprises using an activated titanium compound obtained by contact treatment of magnesium halide, an aromatic orthocarboxylic acid ester and an aluminum halide-organic acid ester complex with a titanium halide as said titanium compound supported on a carrier.
Claim 11
Dependent Claim
47 words
The process of claim 7 wherein said aromatic orthocarboxylic acid ester is represented by the formula, ##STR6## wherein R 1 is an aromatic hydrocarbon radical and each of R 2 , R 3 and R 4 which may be the same or different is a hydrocarbon radical.
Claim 12
Dependent Claim
19 words
The process of claim 7 wherein said magnesium halide is magnesium chloride and said aluminum halide is aluminum chloride.
Claim 13
Dependent Claim
20 words
The process of claim 7 wherein said aluminum halide-organic acid ester complex is an aluminum halide-aromatic carboxylic acid ester complex.
Claim 14
Dependent Claim
77 words
In a process for the stereospecific polymerization of α-olefins with use of a catalyst comprising a titanium compound supported on a carrier, an organoaluminum compound and an electron donative compound, the improvement which comprises using an activated titanium compound obtained by contact treatment of a magnesium halide, an aromatic orthocarboxylic acid ester, an aluminum halide and an organanosilicon compound having at least one alkoxyl group with a titanium halide as said titanium compound supported on a carrier.
Claim 15
Dependent Claim
77 words
In a process for the stereospecific polymerization of α-olefins with use of a catalyst comprising a titanium compound supported on a carrier, an organoaluminum compound and an electron donative compound, the improvement which comprises using an activated titanium compound obtained by contact treatment of a magnesium halide, an aromatic orthocarboxylic acid ester, an aluminum halide and an organanosilicon compound having at least one alkoxyl group with a titanium halide as said titanium compound supported on a carrier.
Claim 16
Dependent Claim
47 words
The process of claim 11 wherein said aromatic orthocarboxylic acid ester is represented by the formula, ##STR7## wherein R 1 is an aromatic hydrocarbon radical and each of R 2 , R 3 and R 4 which may be the same or different is a hydrocarbon radical.
Claim 17
Dependent Claim
19 words
The process of claim 11 wherein said magnesium halide is magnesium chloride and said aluminum halide is aluminum chloride.
Claim 18
Dependent Claim
70 words
The process of claim 11 wherein said organosilicon compound is represented by the formula, Si(OR.sup.5).sub.m X.sub.n Y.sub.p wherein R 5 is an alkyl group, each of X and Y is a hydrocarbon radical, halogen or a carbonyloxy group ##STR8## wherein R is an alkyl group, m is an integer of 1 to 4, each of n and p is 0-3 and the total of m, n and p is 4.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-02 | 1984-03-03 | 1984-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-02 | 1988-03-03 | 1988-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-02 | 1992-03-03 | 1992-09-02 | $7700.00 | Window Closed / Lapsed |