US5001244A
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Metallocene, hydrocarbylaluminum and hydrocarbylboroxine olefin polymerization catalyst
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1990-07-13
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Granted: 1991-03-19
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Expires: 2010-07-13
Abstract
Abstract Olefin polymerization catalysts, and methods for their preparation, comprising a metallocene and the reaction product of a hydrocarbylaluminum with a trihydrocarbylboroxine. The catalyst may be homogeneous or supported.
Inventors
- 👤 Howard C. Welborn, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:52
CPC Classifications
C; C08; C08F; C08F10/00; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068; C08G; C08G79/00; C08G79/10; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65912; C08F4/65916; C08F4/6592; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
39 words
A method of preparing a metallocene containing catalyst effective for olefin polymerization, comprising: (a) reacting a hydrocarbylaluminum with a hydrocarbylboroxine; and (b) adding to the reaction product at least one metallocene of the Group 4b, 5b or 6b metals.
Claim 2
Independent Claim
39 words
A method of preparing a metallocene containing catalyst effective for olefin polymerization, comprising: (a) reacting a hydrocarbylaluminum with a hydrocarbylboroxine; and (b) adding to the reaction product at least one metallocene of the Group 4b, 5b or 6b metals.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the hydrocarbylaluminum and the hydrocarbylboroxine are reacted in a molar ratio hydrocarbylaluminum:hydro-carbylboroxine of from about 3:1 to about 4:1.
Claim 4
Dependent Claim
28 words
The method of claim 1 wherein the metallocene is added in an amount to provide an atomic ratio of transition metal:aluminum of from about 1:600 to about 1:20.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein the metallocene is a zirconocene, hafnocene or a titanocene.
Claim 6
Dependent Claim
13 words
The method of claim 2 wherein the metallocene is a zirconocene or hafnocene.
Claim 7
Independent Claim
73 words
A method of preparing a supported catalyst comprising the reaction product of at least one metallocene, a hydrocarbylaluminum and a hydrocarbylboroxine, effective for olefin polymerization comprising: combining a hydrocarbylaluminum with a hydrocarbylboroxine and at least one metallocene of the Group 4b, 5b or 6b transition metals, in the presence of a catalyst support material, in an amount sufficient to provide from about 0.1 to about 10 millimoles of aluminum per gram of support.
Claim 8
Independent Claim
73 words
A method of preparing a supported catalyst comprising the reaction product of at least one metallocene, a hydrocarbylaluminum and a hydrocarbylboroxine, effective for olefin polymerization comprising: combining a hydrocarbylaluminum with a hydrocarbylboroxine and at least one metallocene of the Group 4b, 5b or 6b transition metals, in the presence of a catalyst support material, in an amount sufficient to provide from about 0.1 to about 10 millimoles of aluminum per gram of support.
Claim 9
Dependent Claim
24 words
The method of claim 6 wherein the hydrocarbylaluminum and hydrocarbylboroxine are combined in a molar ratio hydrocarbylaluminum:hydrocarbylboroxine of from about 3:1 to about 4:1.
Claim 10
Dependent Claim
20 words
The method of claim 6 wherein the atomic ratio of transition metal:aluminum contacted is from about 1:600 to about 1:1.
Claim 11
Dependent Claim
15 words
The method of claim 6 wherein the metallocene is a zirconocene, hafnocene or a titanocene.
Claim 12
Dependent Claim
30 words
The method of claim 6 wherein the degree of oligomerization of the alumoxane product of the reaction of the hydrocarbylaluminum and the hydrocarbylboroxine is from about 2 to about 40.
Claim 13
Dependent Claim
13 words
The method of claim 10 wherein the metallocene is a zirconocene or hafnocene.
Claim 14
Dependent Claim
22 words
The method of claim 6 wherein the catalyst support is a Group 2a, 3a, 4a, 4b metal oxide, or finely-divided polyolefinic material.
Claim 15
Dependent Claim
22 words
The method of claim 11 wherein the catalyst support is a Group 2a, 2a, 4a, 4b metal oxide, or finely-divided polyolefinic material.
Claim 16
Dependent Claim
34 words
An olefin polymerization catalyst comprising the reaction product of (a) at least one metallocene of the Group 4b, 5b or 6b transition metals; and (b) the reaction product of a hydrocarbylaluminum with a hydrocarbylboroxine.
Claim 17
Dependent Claim
34 words
An olefin polymerization catalyst comprising the reaction product of (a) at least one metallocene of the Group 4b, 5b or 6b transition metals; and (b) the reaction product of a hydrocarbylaluminum with a hydrocarbylboroxine.
Claim 18
Dependent Claim
21 words
The catalyst of claim 14 wherein the atomic ratio of aluminum to transition metal is from about 600:1 to about 1:1.
Claim 19
Dependent Claim
19 words
The catalyst of claim 14 wherein the metallocene is a zirconocene, a hafnocene or a titanocene, or mixtures thereof.
Claim 20
Dependent Claim
23 words
The catalyst of claim 14 further comprising a catalyst support comprising a Group 2a, 3a, 4a, 4b metal oxide or finely-divided polyolefinic material.
Claim 21
Dependent Claim
19 words
The catalyst of claim 17 wherein the atomic ratio of aluminum:transition metal is from about 100:1 to about 1:1.
Claim 22
Dependent Claim
15 words
The catalyst of claim 17 wherein the metallocene is a zirconocene, hafnocene or a titanocene.
Claim 23
Dependent Claim
23 words
A process for the polymerization of olefins comprising contacting olefins with the catalyst of claims 14 or 17 to produce a polymeric product.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-03-18 | 1994-09-17 | 1995-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-18 | 1998-09-17 | 1999-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-18 | 2002-09-17 | 2003-03-19 | $7700.00 | Window Closed / Lapsed |