US3779944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butadiene polymerization catalyst
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1971-08-27
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Granted: 1973-12-18
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Expires: 1991-08-27
Abstract
Abstract Process utilizing Ziegler-type catalyst system for polymerizing butadiene to high molecular weight polybutadienes possessing varying proportions of trans-1,4 units, in the range of 50-90 percent comprising: an organoaluminum compound, a Lewis base, and a Ti(halogen)3.nAlI3 composition. The polymers thus obtained exhibit outstanding properties as elastomers when cross-linked and as thermo-elastic polymers in the uncured state.
Inventors
- 👤 C Cozewith
- 👤 E Tornqvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:45
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
11 words
The catalyst system of claim 1 wherein the TiX3.nAlI3 is TiCl3.nAlI3.
Claim 2
Dependent Claim
15 words
The catalyst system of claim 1 wherein the organo aluminum compound is an aluminum trialkyl.
Claim 3
Dependent Claim
14 words
The catalyst system of claim 1 wherein the organo aluminum compound is aluminum triethyl.
Claim 4
Dependent Claim
14 words
The catalyst system of claim 1 wherein the organo aluminum compound is aluminum triisobutyl.
Claim 5
Dependent Claim
21 words
The catalyst system of claim 1 wherein the mole ratio of the organo aluminum to AlI3 is between 3:1 and 1.4:1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |