US6841506B2
Expired / Lapsed
US
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Polymerization catalyst system containing polyether-modified aluminoxane
Assignee: Equistar Chemicals LP
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Filing: 2004-03-05
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Granted: 2005-01-11
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Expires: 2024-03-05
Abstract
Abstract A modified aluminoxane is disclosed. Aluminoxane compounds are modified with glycol ethers or polyethers. The modified aluminoxanes are effective activators for single-site catalysts. Catalyst activated with the modified aluminoxane produces polyolefin with increased melt flow index, broadened molecular weight distribution, and improved thermal processability.
Inventors
- 👤 Shao-Hua Guo
- 👤 Shaotian Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:35
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2282; B01J31/2295; B01J31/02; B01J31/12; B01J31/14; B01J31/143; B01J31/1616; C; C08; C08F; C08F10/00; B01J2531/00; B01J2531/40; B01J2531/48; C08F110/00; C08F110/02; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65916; C08F4/6592; C08F4/65922; C08F4/65927; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
21 words
A catalyst system comprising a polyether-treated aluminoxane and a transition metal complex, wherein the polyether has more than three glycol units.
Claim 2
Dependent Claim
21 words
A catalyst system comprising a polyether-treated aluminoxane and a transition metal complex, wherein the polyether has more than three glycol units.
Claim 3
Dependent Claim
74 words
The catalyst system of claim 1 wherein the transition metal complex has the general formula: (L) n —M—(X) m wherein M is a transition metal; X is selected from the group consisting of hydrogen, halides, C 1-10 hydrocarbyls, C 1-10 alkoxys, and C 5-10 aryloxys; L is selected from the group consisting of cyclopentadienyl, boraary, pyrrolyl, azaborolinyl, quinolinyl, indenoindolyl, and phosphinimine; and the sum of n and m equals to the valence of M.
Claim 4
Dependent Claim
19 words
The catalyst system of claim 2 wherein M is selected from the group consisting of Zr, Ti, and Hf.
Claim 5
Dependent Claim
11 words
The catalyst system of claim 2 wherein X is a halide.
Claim 6
Dependent Claim
12 words
The catalyst system of claim 2 wherein L is an indenoindolyl ligand.
Claim 7
Dependent Claim
37 words
The catalyst system of claim 1 wherein the polyether is selected from the group consisting of polyethylene glycol, polyethylene glycol monoalkyl ethers, polyethylene glycol dialkyl ethers, polypropylene glycol, polypropylene glycol monoalkyl ethers, and polypropylene glycol dialkyl ethers.
Claim 8
Dependent Claim
47 words
The catalyst system of claim 1 wherein the aluminoxane has the general formula: R 1 2 AlO(R 2 AlO) n AlR 3 2 wherein each R 1 , R 2 , and R 3 is independently a C 1-20 hydrocarbyl and n is from 0 to 50.
Claim 9
Dependent Claim
29 words
The catalyst system of claim 1 wherein the aluminoxane is a cyclic aluminoxane having a repeating unit of —[Al(R 4 )—O]— wherein R 4 is a C 1-20 hydrocarbyl.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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