Patent US3962130A successfully refreshed from Google Patents.
US3962130A
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Butadiene polymerization catalyst
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1975-01-02
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Granted: 1976-06-08
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Expires: 1995-01-02
Abstract
Abstract Ziegler-type hydrocarbon-soluble catalyst systems for the polymerization of conjugated diolefins, or mixtures thereof, to obtain high molecular weight polymers possessing varying proportions of trans-1,4 units, in the range of 50-90%. The catalyst systems are based on a non-reduced salt of titanium, an organometallic compound, and an iodine-containing compound, or iodine corresponding to the generalized formula Ti(halide) 4 -M n I m -AlR a X 3 -a, where M is aluminum or tetravalent tin, n is 0 or 1, m is the valence of M and where n is 0, m is 2, X is Cl, Br or I, a is 2 to 3, R is alkyl, halide is Cl, Br or I, and where halide is I, M n I m may be omitted.
Inventors
- 👤 Erik G. M. Tornqvist
- 👤 Charles Cozewith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:50
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A hydrocarbon-soluble catalyst system consisting essentially of: a. TiCl 4 -AlI 3 ; b. an aluminum trialkyl where the alkyl has from 1-12 carbon atoms, the molar ratio of aluminum trialkyl to TiCl 4 -AlI 3 being in the range of from about 1.5:1 to about 4.5:1; and c. a Lewis base selected from the group consisting of tetrahydrothiophene, tetrahydropyran, tetrahydrofuran, tetrahydrothiopyran, and 2,5-dimethyl tetrahydrofuran, the mole ratio of Lewis base to TiCl 4 being in the range of 10:1 to 200:1.
Claim 2
Dependent Claim
82 words
A hydrocarbon-soluble catalyst system consisting essentially of: a. TiCl 4 -AlI 3 ; b. an aluminum trialkyl where the alkyl has from 1-12 carbon atoms, the molar ratio of aluminum trialkyl to TiCl 4 -AlI 3 being in the range of from about 1.5:1 to about 4.5:1; and c. a Lewis base selected from the group consisting of tetrahydrothiophene, tetrahydropyran, tetrahydrofuran, tetrahydrothiopyran, and 2,5-dimethyl tetrahydrofuran, the mole ratio of Lewis base to TiCl 4 being in the range of 10:1 to 200:1.
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) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |