Patent US6376629B2 successfully refreshed from Google Patents.
US6376629B2
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Single-site catalysts for olefin polymerization
Assignee: Equistar Chemicals LP
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Filing: 2001-01-29
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Granted: 2002-04-23
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Expires: 2021-01-29
Abstract
Abstract A single-site olefin polymerization catalyst and method of making it are disclosed. The catalyst comprises an activator and an organometallic complex. The complex comprises a Group 3 to 10 transition or lanthanide metal, M, and at least one indenoindolyl ligand that is pi-bonded to M. The key ligand is made in two steps from readily available indanones and aryl hydrazines. Reaction of its anion with a source of the metal completes a remarkably simple synthetic route to a new family of single-site olefin polymerization catalysts.
Inventors
- 👤 Sandor Nagy
- 👤 Bradley P. Etherton
- 👤 Ramesh Krishnamurti
- 👤 John A. Tyrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:46
CPC Classifications
C; C08; C08F; C08F10/00; C08F110/00; C08F110/02; C08F210/00; C08F210/16; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65912; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
45 words
A process which comprises polymerizing an olefin in the presence of a catalyst which comprises: (a) an activator; and (b) an organometallic complex comprising a Group 3 to 10 transition or lanthanide metal, M, and at least one indenoindolyl ligand that is π-bonded to M.
Claim 2
Dependent Claim
45 words
A process which comprises polymerizing an olefin in the presence of a catalyst which comprises: (a) an activator; and (b) an organometallic complex comprising a Group 3 to 10 transition or lanthanide metal, M, and at least one indenoindolyl ligand that is π-bonded to M.
Claim 3
Dependent Claim
51 words
A process which comprises copolymerizing ethylene with a C 3 -C 10 α-olefin in the presence of a catalyst which comprises: (a) an activator; and (b) an organometallic complex comprising a Group 3 to 10 transition or lanthanide metal, M, and at least one indenoindolyl ligand that is π-bonded to M.
Claim 4
Dependent Claim
51 words
A process which comprises copolymerizing ethylene with a C 3 -C 10 α-olefin in the presence of a catalyst which comprises: (a) an activator; and (b) an organometallic complex comprising a Group 3 to 10 transition or lanthanide metal, M, and at least one indenoindolyl ligand that is π-bonded to M.
Claim 5
Independent Claim
82 words
A method which comprises: (a) reacting an indanone with an aryl hydrazine in the presence of a basic or acidic catalyst to produce an aryl hydrazone; (b) cyclizing the aryl hydrazone in the presence of an acidic catalyst to produce an indenoindole; (c) deprotonating the indenoindole and reacting the resulting anion with a Group 3 to 10 transition or lanthanide metal source to produce an organometallic complex comprising the metal, M, and at least one indenoindolyl ligand that is π-bonded to M.
Claim 6
Independent Claim
82 words
A method which comprises: (a) reacting an indanone with an aryl hydrazine in the presence of a basic or acidic catalyst to produce an aryl hydrazone; (b) cyclizing the aryl hydrazone in the presence of an acidic catalyst to produce an indenoindole; (c) deprotonating the indenoindole and reacting the resulting anion with a Group 3 to 10 transition or lanthanide metal source to produce an organometallic complex comprising the metal, M, and at least one indenoindolyl ligand that is π-bonded to M.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2005-04-22 | 2005-10-22 | 2006-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-04-22 | 2009-10-22 | 2010-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-04-22 | 2013-10-22 | 2014-04-23 | $7700.00 | Window Closed / Lapsed |