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US4665047A
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Stabilization of metallocene/aluminoxane catalysts
Assignee: Shell USA Inc
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Filing: 1986-08-15
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Granted: 1987-05-12
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Expires: 2006-08-15
Abstract
Abstract Zirconocene/aluminoxane polymerization/oligomerization catalysts are stabilized against aging prior to use as catalysts by use of at least 1 mole of 3,3,3-trialkyl-1-propene per mole of metallocene.
Inventors
- 👤 Lynn H. Slaugh
- 👤 Galeon W. Schoenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:12
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65912; C08F4/6592; C08F4/65922; C08F4/65925
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
117 words
A method for stabilizing a zirconocene/aluminoxane catalyst comprising (a) a zirconocene of the general formula (cyclopentadienyl) n ZrY 4-n wherein n is an integer from 1 to 4, and Y is individually selected from the group consisting of hydrogen, C 1 -C 5 alkyl, C 6 -C 20 aryl and halogen and (b) an aluminoxane against aging during storage prior to use as a catalyst which comprises adding to the catalyst during or after its preparation at least 1 mole of a stabilizing olefin of the formula R 1 R 2 R 3 CCH 2 ═CH 2 (wherein R 1 , R 2 and R 3 are C 1 -C 20 alkyl moieties) per mole of zirconocene.
Claim 2
Independent Claim
117 words
A method for stabilizing a zirconocene/aluminoxane catalyst comprising (a) a zirconocene of the general formula (cyclopentadienyl) n ZrY 4-n wherein n is an integer from 1 to 4, and Y is individually selected from the group consisting of hydrogen, C 1 -C 5 alkyl, C 6 -C 20 aryl and halogen and (b) an aluminoxane against aging during storage prior to use as a catalyst which comprises adding to the catalyst during or after its preparation at least 1 mole of a stabilizing olefin of the formula R 1 R 2 R 3 CCH 2 ═CH 2 (wherein R 1 , R 2 and R 3 are C 1 -C 20 alkyl moieties) per mole of zirconocene.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein the stabilizing olefin is 3,3,3-trialkyl-1-propene.
Claim 4
Dependent Claim
11 words
The method of claim 2 wherein the stabilizing olefin is 3,3,3-trimethyl-1-propene.
Claim 5
Dependent Claim
92 words
A stabilized zirconocene/aluminoxane catalyst composition comprising a zirconocene of the general formula (cyclopentadienyl) n ZrY 4-n wherein n is an integer from 1 to 4, and Y is individually selected from the group consisting of hydrogen, C 1 -C 5 alkyl, C 6 -C 20 aryl and halogen; an aluminoxane and at least 1 mole of a stabilizing olefin of the formula R 1 R 2 R 3 CCH 2 ═CH 2 (where R 1 , R 2 and R 3 are C 1 -C 20 alkyl moieties) per mole of zirconocene.
Claim 6
Dependent Claim
92 words
A stabilized zirconocene/aluminoxane catalyst composition comprising a zirconocene of the general formula (cyclopentadienyl) n ZrY 4-n wherein n is an integer from 1 to 4, and Y is individually selected from the group consisting of hydrogen, C 1 -C 5 alkyl, C 6 -C 20 aryl and halogen; an aluminoxane and at least 1 mole of a stabilizing olefin of the formula R 1 R 2 R 3 CCH 2 ═CH 2 (where R 1 , R 2 and R 3 are C 1 -C 20 alkyl moieties) per mole of zirconocene.
Claim 7
Dependent Claim
17 words
The composition of claim 4 wherein the zirconocene is bis(cyclopentadienyl)zirconium dichloride, bis(cyclopentadienyl)zirconium hydrogen chloride or bis(cyclopentadienyl)zirconium dimethyl.
Claim 8
Dependent Claim
13 words
The composition of claims 4 or 5 wherein the stabilizing olefin is 3,3,3-trialkyl-1-propene.
Claim 9
Dependent Claim
13 words
The composition of claims 4 or 5 wherein the stabilizing olefin is 3,3,3-trimethyl-1-propene.
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) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |