US5731451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified polyalkylauminoxane composition formed using reagent containing aluminum trialkyl siloxide
Assignee: Akzo Nobel NV
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Filing: 1996-07-12
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Granted: 1998-03-24
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Expires: 2016-07-12
Abstract
Abstract A process is disclosed for forming an aluminoxane composition comprising methylaluminoxane by mixing trimethylaluminum, or a mixture of trimethylaluminum and one or more other trihydrocarbylaluminum compounds, with an organoaluminum compound containing a trialkylsiloxide moiety and then oxygenating the mixture to form the aluminoxane. Oxygenation can be carried out by controlled hydrolysis or by treatment with an organic compound containing carbon-oxygen bonds, such as carbon dioxide. A preferred trialkylsiloxide moiety is of the formula -OSi(CH3)3, such as in a compound of the formula (CH3)2AlOSi(CH3)3.
Inventors
- 👤 Gregory M. Smith
- 👤 Dennis B. Malpass
- 👤 Stanley W. Palmaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:41
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0836; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
42 words
A process for forming an aluminoxane composition comprising methylaluminoxane which comprises mixing trimethylaluminum, or a mixture of trimethylaluminum and one or more other trihydrocarbylaluminum compounds, with an organoaluminum compound containing a trialkylsiloxide moiety and then oxygenating the mixture to form the aluminoxane.
Claim 2
Dependent Claim
42 words
A process for forming an aluminoxane composition comprising methylaluminoxane which comprises mixing trimethylaluminum, or a mixture of trimethylaluminum and one or more other trihydrocarbylaluminum compounds, with an organoaluminum compound containing a trialkylsiloxide moiety and then oxygenating the mixture to form the aluminoxane.
Claim 3
Dependent Claim
25 words
A process as claimed in claim 1 wherein the trialkylsiloxide moiety contained in the organoaluminum compound is of the formula --OSi(CH 3 ) 3 .
Claim 4
Dependent Claim
28 words
A process as claimed in claim 1 wherein the organoaluminum compound containing the trialkylsiloxide moiety is of the formula (CH 3 ) 2 AlOSi(CH 3 ) 3 .
Claim 5
Dependent Claim
30 words
A process as claimed in claim 1 wherein the mole ratio basis on aluminum of trimethylaluminum to organoaluminum compound containing the trialkylsiloxide moiety ranges from about 1:10 to about 100:1.
Claim 6
Dependent Claim
30 words
A process as claimed in claim 2 wherein the mole ratio basis on aluminum of trimethylaluminum to organoaluminum compound containing the trialkylsiloxide moiety ranges from about 1:3 to about 5:1.
Claim 7
Dependent Claim
30 words
A process as claimed in claim 3 wherein the mole ratio basis on aluminum of trimethylaluminum to organoaluminum compound containing the trialkylsiloxide moiety ranges from about 1:2 to about 3:1.
Claim 8
Dependent Claim
9 words
A product formed by the process of claim 1.
Claim 9
Dependent Claim
9 words
A product formed by the process of claim 2.
Claim 10
Dependent Claim
9 words
A product formed by the process of claim 3.
Claim 11
Dependent Claim
9 words
A product formed by the process of claim 4.
Claim 12
Dependent Claim
9 words
A product formed by the process of claim 5.
Claim 13
Dependent Claim
9 words
A product formed by the process of claim 6.
Claim 14
Dependent Claim
10 words
The supported product formed by the process of claim 1.
Claim 15
Dependent Claim
10 words
The supported product formed by the process of claim 2.
Claim 16
Dependent Claim
10 words
The supported product formed by the process of claim 4.
Claim 17
Dependent Claim
10 words
The silica-supported product formed by the process of claim 1.
Claim 18
Dependent Claim
10 words
The silica-supported product formed by the process of claim 2.
Claim 19
Dependent Claim
10 words
The silica-supported product formed by the process of claim 4.
Claim 20
Dependent Claim
25 words
A catalyst composition for use in the polymerization of olefins which comprise the aluminoxane, optionally on a support, formed by the process of claim 1.
Claim 21
Dependent Claim
25 words
A catalyst composition for use in the polymerization of olefins which comprise the aluminoxane, optionally on a support, formed by the process of claim 2.
Claim 22
Dependent Claim
25 words
A catalyst composition for use in the polymerization of olefins which comprise the aluminoxane, optionally on a support, formed by the process of claim 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) | 2001-03-23 | 2001-09-22 | 2002-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-23 | 2005-09-22 | 2006-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-23 | 2009-09-22 | 2010-03-24 | $7700.00 | Window Closed / Lapsed |