US4851378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymerization of copolymerization catalyst components
Assignee: Texas Alkyls Inc
•
Filing: 1988-10-11
•
Granted: 1989-07-25
•
Expires: 2008-10-11
Abstract
Abstract Aluminum-containing compositions for use particularly as olefin polymerization or copolymerization cocatalysts are produced by reaction of trialkylaluminums or dialkylaluminum hydrides with 1,3- or 1,4-pentadiene at a mole ratio of aluminum compound to pentadiene of approximately 1:1, with removal during the reaction of evolved olefin.
Inventors
- 👤 Dennis B. Malpass
- 👤 Loyd W. Fannin
- 👤 Michael J. Breen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:59
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
77 words
A supported titanium-containing olefin polymerization catalyst comprising, as a cocatalyst component, a composition formed by reacting a trialkylaluminum or a dialkylaluminum hydride, in which the alkyl groups each contain 2 to 4 carbon atoms, with a diolefin selected from the group consisting of 1,3-pentadiene and 1,4-pentadiene, at a molar ratio of aluminum compound to diolefin of approximately 1:1, at a temperature of from about 85° C. to about 150° C., while removing evolved olefin during the reaction.
Claim 2
Dependent Claim
77 words
A supported titanium-containing olefin polymerization catalyst comprising, as a cocatalyst component, a composition formed by reacting a trialkylaluminum or a dialkylaluminum hydride, in which the alkyl groups each contain 2 to 4 carbon atoms, with a diolefin selected from the group consisting of 1,3-pentadiene and 1,4-pentadiene, at a molar ratio of aluminum compound to diolefin of approximately 1:1, at a temperature of from about 85° C. to about 150° C., while removing evolved olefin during the reaction.
Claim 3
Dependent Claim
16 words
An olefin polymerization or copolymerization catalytic system according to claim 1 further comprising a trialkylaluminum compound.
Claim 4
Dependent Claim
12 words
A catalyst as claimed in claim 1 wherein the diolefin is 1,3-pentadiene.
Claim 5
Dependent Claim
12 words
A catalyst as claimed in claim 1 wherein the diolefin is 1,4-pentadiene.
Claim 6
Dependent Claim
12 words
A catalyst as claimed in claim 3 wherein a trialkylaluminum is reacted.
Claim 7
Dependent Claim
13 words
A catalyst as claimed in claim 3 wherein a dialkylaluminum hydride is reacted.
Claim 8
Dependent Claim
12 words
A catalyst as claimed in claim 4 wherein a trialkylaluminum is reacted.
Claim 9
Dependent Claim
13 words
A catalyst as claimed in claim 4 wherein a dialkylaluminum hydride is reacted.
References Cited (Backward Citations)
US3149136A
Cited
US3135809A
Cited
US3325524A
Cited
US4232139A
Cited
US4311816A
Cited
US4324691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-24 | 1993-01-23 | 1993-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-24 | 1997-01-23 | 1997-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-24 | 2001-01-23 | 2001-07-25 | $7700.00 | Window Closed / Lapsed |