US4710482A
Expired / Lapsed
US
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Olefin polymerization catalyst component
Assignee: Union Carbide Chemicals and Plastics Technology LLC
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Filing: 1986-06-18
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Granted: 1987-12-01
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Expires: 2006-06-18
Abstract
Abstract Olefin polymerization catalyst components having improved activity and morphological properties are disclosed and claimed. In particular, the components are prepared by reacting a magnesium compound of the formula [Mg4(OR)6(R'OH)10]X where "X" is a counter ion having a total charge of -2 and R and R', which may be the same or different, are selected from alkyl groups of 1 to 4 carbon atoms, with a halogenated tetravalent titanium component, a halohydrocarbon component and an electron donor.
Inventors
- 👤 Robert C. Job
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:51
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08F; C08F10/00; C07; C07C; C07C31/00; C07C31/28; C07C31/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
112 words
A solid magnesium halide/titanium halide catalyst component useful for the polymerization of alpha olefins which has been obtained by the process comprising: (a) contacting a stable magnesium compound of the formula [Mg 4 (OR) 6 (R'OH) 10 ]X where X is a counter ion having a total charge of -2 and R and R', which may be the same or different, are selected from alkyl groups of 1 to 4 carbon atoms with a halide of tetravalent titanium in the presence of an electron donor; (b) contacting the resulting halogenated product with a tetravalent titanium halide; (c) washing the resulting product to remove unreacted titanium compounds; and (d) recovering the solid product.
Claim 2
Dependent Claim
112 words
A solid magnesium halide/titanium halide catalyst component useful for the polymerization of alpha olefins which has been obtained by the process comprising: (a) contacting a stable magnesium compound of the formula [Mg 4 (OR) 6 (R'OH) 10 ]X where X is a counter ion having a total charge of -2 and R and R', which may be the same or different, are selected from alkyl groups of 1 to 4 carbon atoms with a halide of tetravalent titanium in the presence of an electron donor; (b) contacting the resulting halogenated product with a tetravalent titanium halide; (c) washing the resulting product to remove unreacted titanium compounds; and (d) recovering the solid product.
Claim 3
Dependent Claim
47 words
The solid component of claim 1 wherein R' is CH 3 and "R" is CH 3 and "X" is selected from the group consisting of Cl 2 = , I 2 = , Br 2 = , SO 4 = and C 2 O 4 = .
Claim 4
Dependent Claim
13 words
The solid component of claim 2 wherein "X" is Cl 2 = .
Claim 5
Dependent Claim
29 words
The solid component of claim 1 wherein said magnesium compound is contacted with said halide of tetravalent titanium and said electron donor also in the presence of a halohydrocarbon.
Claim 6
Dependent Claim
15 words
The solid component of claim 1 wherein said tetravalent titanium halide is TiCl 4 .
Claim 7
Dependent Claim
20 words
The solid component of claim 4 wherein said tetravalent titanium compound is TiCl 4 and said halohydrocarbon is a chlorohydrocarbon.
Claim 8
Dependent Claim
40 words
The solid component of claim 3 wherein said magnesium compound is heated in an inert light hydrocarbon so as to remove a portion or all of the methanol (CH 3 OH) groups prior to contacting with said tetravalent titanium halide.
Claim 9
Dependent Claim
13 words
The solid component of claim 7 wherein said inert light hydrocarbon is isooctane.
Claim 10
Dependent Claim
20 words
The solid component of claim 6 wherein said electron donor is an ester or diester of an aromatic carboxylic acid.
Claim 11
Dependent Claim
35 words
An olefinic polymerization catalyst composition comprising an organoaluminum compound, a selectivity control agent, and the solid catalyst component of claim 1 wherein the atomic ratio of aluminum to titanium is about 30:1 to about 100:1.
Claim 12
Dependent Claim
70 words
The composition of claim 10 wherein said organoaluminum compound is a trialkylaluminum and said selectivity control agent is selected from the group consisting of esters and diesters of aromatic carboxylic acids and silicon compounds of the general formula R 1 n Si(OR 2 ) 4-n , where n is between zero and three, R 1 is a hydrocarbon group or a halogen atom and R 2 is a hydrocarbon group.
Claim 13
Dependent Claim
11 words
The composition of claim 11 wherein said trialkylaluminum is triethyl aluminum.
Claim 14
Dependent Claim
18 words
The composition of claim 11 wherein said selectivity control agent is selected from ethyl benzoate and diisobutyl phthalate.
Claim 15
Dependent Claim
19 words
The composition of claim 11 wherein said selectivity control agent is selected from diphenyl dimethoxy silane and phenethyltrimethoxy silane.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |