US3177183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of cispolybutadiene
Assignee: Phillips Petroleum Co
•
Filing: 1961-02-23
•
Granted: 1965-04-06
•
Expires: 1981-02-23
Abstract
No abstract record available.
Inventors
- 👤 Floyd E Naylor
- 👤 Jr Ralph C Farrar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:34
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06; C08F2410/00; C08F2410/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN A PROCESS FOR THE POLYMERIZATION OF 1,3-BUTADIENE IN THE PRESENCE OF AN INITIATOR SYSTEM FORMED BY ADMIXING (A) AN ORGANOMETAL COMPOUND CORRESPONDING TO THE FORMULA RNM, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL, CYCLOALKYL, ARYL, ARALKYL AND ALKARYL RADICALS CONTAINING FROM 1 TO 20, INCLUSIVE, CARBON ATOMS, M IS A METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, MAGNESIUM AND LEAD, AND N IS EQUAL TO THE VALENCE OF THE METAL, (B) TITANIUM TETRACHLORIDE, AND (C) A COMPONENT SELECTED FROM THE GROUP CONSISTING OF (1) TITANIUM TETRAIODIDE, AND, WHEN M IS ALUMINUM AND MAGNESIUM, (2) IODINE, THE IMPROVEMENT COMPRISING CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF A SMALL AMOUNT OF ISOPRENE SUFFICIENT TO IMPROVE THE PROCESSABILITY OF THE POLYMERIZATION PRODUCT BUT NOT EXCEEDING 5 PARTS BY WEIGHT PER 100 WEIGHT PARTS OF BUTADIENE.
Claim 2
Dependent Claim
138 words
IN A PROCESS FOR THE POLYMERIZATION OF 1,3-BUTADIENE IN THE PRESENCE OF AN INITIATOR SYSTEM FORMED BY ADMIXING (A) AN ORGANOMETAL COMPOUND CORRESPONDING TO THE FORMULA RNM, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL, CYCLOALKYL, ARYL, ARALKYL AND ALKARYL RADICALS CONTAINING FROM 1 TO 20, INCLUSIVE, CARBON ATOMS, M IS A METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, MAGNESIUM AND LEAD, AND N IS EQUAL TO THE VALENCE OF THE METAL, (B) TITANIUM TETRACHLORIDE, AND (C) A COMPONENT SELECTED FROM THE GROUP CONSISTING OF (1) TITANIUM TETRAIODIDE, AND, WHEN M IS ALUMINUM AND MAGNESIUM, (2) IODINE, THE IMPROVEMENT COMPRISING CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF A SMALL AMOUNT OF ISOPRENE SUFFICIENT TO IMPROVE THE PROCESSABILITY OF THE POLYMERIZATION PRODUCT BUT NOT EXCEEDING 5 PARTS BY WEIGHT PER 100 WEIGHT PARTS OF BUTADIENE.
References Cited (Backward Citations)
US2959576A
Cited
US2979488A
Cited
US3005811A
Cited
US2938019A
Cited
US3036056A
Cited
US3076795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |