US2791618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing alkali-metal catalyzed polymers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-02-10
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Granted: 1957-05-07
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Expires: 1975-02-10
Abstract
No abstract record available.
Inventors
- 👤 Moise James Edward
- 👤 Segura Marnell Albin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:48
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A PROCESS FOR PRODUCING LIQUID POLYMER OIL WHICH COMPRISES CHARGING A MIXTURE OF 50 TO 100 PARTS OF BUTADIENE, 50 TO 0 PARTS STYRENE, ABOUT 1 TO 100 PARTS OF AN ETHER HAVING 4 TO 8 CARBON ATOMS PER MOLECULE CHOSEN FROM THE GROUP CONSISTING OF ALKYL ETHERS AND CYCLIC DIETHERS HAVING THE OXYHEN ATOMS SEPARATED BY AT LEAST TWO CARBON ATOMS AND ABOUT 1.0 TO 2 PARTS OF FINELY DIVIDED ALKALI METAL CATALYST TO A FIRST POLYMERIZATION ZONE, MAINTAINING AN EQUALILBRIUM MONOMER CONCENTRATION OF BETWEEN 40% TO 60% ON A 100% MONOMER FEED BASES, IN SAID FIRST ZONE, HEATING THE MIXTURE AT A TEMPERATURE BETWEEN 50 AND 70*C. UNTIL 40 TO 60% CONVERSION OF MONMERS IS REACHED, CONTINUOUSLY PASSING THE POLYMERIZED MIXTURE TO AT LEAST ONE ADDITIONAL POLYMERIZATION ZONE AT A TEMPERATURE BETWEEN 70 AND 105*C., ADDING BETWEET 50 TO 500 PARTS BASED ON THE TOTAL REACTION MIXTURE OF AN INERT HYDROCARBON DILUENT BOILING BETWEEN 20 AND 250*C. TO AT LEAST ONE OF SAID ADDITIONAL
Claim 2
Dependent Claim
166 words
A PROCESS FOR PRODUCING LIQUID POLYMER OIL WHICH COMPRISES CHARGING A MIXTURE OF 50 TO 100 PARTS OF BUTADIENE, 50 TO 0 PARTS STYRENE, ABOUT 1 TO 100 PARTS OF AN ETHER HAVING 4 TO 8 CARBON ATOMS PER MOLECULE CHOSEN FROM THE GROUP CONSISTING OF ALKYL ETHERS AND CYCLIC DIETHERS HAVING THE OXYHEN ATOMS SEPARATED BY AT LEAST TWO CARBON ATOMS AND ABOUT 1.0 TO 2 PARTS OF FINELY DIVIDED ALKALI METAL CATALYST TO A FIRST POLYMERIZATION ZONE, MAINTAINING AN EQUALILBRIUM MONOMER CONCENTRATION OF BETWEEN 40% TO 60% ON A 100% MONOMER FEED BASES, IN SAID FIRST ZONE, HEATING THE MIXTURE AT A TEMPERATURE BETWEEN 50 AND 70*C. UNTIL 40 TO 60% CONVERSION OF MONMERS IS REACHED, CONTINUOUSLY PASSING THE POLYMERIZED MIXTURE TO AT LEAST ONE ADDITIONAL POLYMERIZATION ZONE AT A TEMPERATURE BETWEEN 70 AND 105*C., ADDING BETWEET 50 TO 500 PARTS BASED ON THE TOTAL REACTION MIXTURE OF AN INERT HYDROCARBON DILUENT BOILING BETWEEN 20 AND 250*C. TO AT LEAST ONE OF SAID ADDITIONAL
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) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |