US5362824A
Expired / Lapsed
US
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Olefin polymerization catalysts
Assignee: Mobil Oil AS
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Filing: 1992-12-15
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Granted: 1994-11-08
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Expires: 2012-12-15
Abstract
Abstract An improved catalyst for the polymerization of olefins comprising at least one metallocene and at least one aluminoxane co-catalyst supported on a substrate comprising a cross-linked polymeric, porous, resin wherein at least one of the monomers in the resin has at least one pendant functional group which is not reactive under the conditions of the formation of the substrate, and therefore survives the copolymerization which forms the substrate. One specific cross-linked resin is a copolymer of styrene, divinyl benzene and acetoxy styrene.
Inventors
- 👤 Allan B. Furtek
- 👤 Ronald S. Shinomoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:43
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/619; C08F4/61912; C08F4/61916; C08F4/6192; C08F4/61922; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
57 words
An olefin polymerization process comprising polymerizing at least one polymerizable lower olefin, under polymerization conditions, with a polymerization catalyst comprising at least one metallocene and at least one aluminoxane dispersed on the surface of a resinous substrate comprising a cross-linked copolymer of about 30% divinyl benzene, about 55% styrene, and about 15% of acetoxy or hydroxy styrene.
Claim 2
Dependent Claim
57 words
An olefin polymerization process comprising polymerizing at least one polymerizable lower olefin, under polymerization conditions, with a polymerization catalyst comprising at least one metallocene and at least one aluminoxane dispersed on the surface of a resinous substrate comprising a cross-linked copolymer of about 30% divinyl benzene, about 55% styrene, and about 15% of acetoxy or hydroxy styrene.
Claim 3
Dependent Claim
31 words
An improved olefin polymerization process as claimed in claim 1 wherein said aluminoxane is present in said catalyst in a proportion of about 0.1 to 10 mmol of aluminum/gm of support.
Claim 4
Dependent Claim
27 words
An improved olefin polymerization process as claimed in claim 1 wherein said metallocene comprises at least one metal selected from the group consisting of zirconium and hafnium.
Claim 5
Dependent Claim
17 words
An improved olefin polymerization process as claimed in claim 1 wherein said aluminoxane comprises an alkyl aluminoxane.
Claim 6
Dependent Claim
20 words
An improved olefin polymerization process as claimed in claim 1 wherein said catalyst further contains at least one hydrocarbyl aluminum.
Claim 7
Dependent Claim
15 words
An improved olefin polymerization process as claimed in claim 5 wherein said hydrocarbyl is alkyl.
Claim 8
Dependent Claim
21 words
An improved olefin polymerization process as claimed in claim 6 wherein said alkyl group has about 1 to 6 carbon atoms.
Claim 9
Dependent Claim
22 words
An improved olefin polymerization process as claimed in claim 5 wherein said hydrocarbyl aluminum comprises about 0.1 to 6 mmol/g of support.
Claim 10
Dependent Claim
18 words
An improved olefin polymerization process as claimed in claim 8 wherein said hydrocarbyl group comprises a branched group.
Claim 11
Dependent Claim
18 words
An improved olefin polymerization process as claimed in claim 8 wherein said hydrocarbyl group is isoprenyl or isobutyl.
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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) | 1997-11-07 | 1998-05-09 | 1998-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-07 | 2002-05-09 | 2002-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-07 | 2006-05-09 | 2006-11-08 | $7700.00 | Window Closed / Lapsed |