Patent US3499882A successfully refreshed from Google Patents.
US3499882A
Expired / Lapsed
US
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Diene polymerization process and catalyst therefor
Assignee: SYNPOL Inc A CORP OF DEL
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Filing: 1966-09-13
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Granted: 1970-03-10
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Expires: 1986-09-13
Abstract
No abstract record available.
Inventors
- 👤 Walter Nudenberg
- 👤 Dudley B Merrifield
- 👤 Edward Axel Delaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:18
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR PREPARING POLYBUTADIENE OF CONTROLLED CIS-1,4 STRUCTURE AND CONFIGURATION WHICH COMPRISES CONTACTING BUTADIENE IN A HYDROCARBON MEDIUM INERT TO POLYMERIZATION AT A TEMPERATURE BETWEEN -10* AND 90*C. WITH A CATALYST COMPRISING TITANIUM TETRAHALIDE AND AN ETHER-FREE ORGANOMAGNESIUM COMPOUND OF THE FORMULA R2MG AND RMGX WHEREIN R IS A HYDROCARBYL RADICAL CONTAINING 1-30 CARBON ATOMS, AND X IS SELECTED FROM THE GROUP CONSISTING OF BROMINE, IODINE AND CHLORINE, SAID CATALYST BEING FORMED OF SAID ORGANOMAGNESIUM COMPOUND AND SAID TITANIUM TETRAHALIDE IN A MOL RATIO OF 1:10 TO 10:1 TO GIVE AN ACTIVE FRESH HYDROCARBYLTITANIUM TRIHALIDE COMPLEX CATALYST, WHEREIN AN OXIDIZING AGENT AS A THIRD COMPONENT IS ADDED TO KEEP THE TITANIUM IN THE TETRAVALENT STATE.
Claim 2
Dependent Claim
116 words
A PROCESS FOR PREPARING POLYBUTADIENE OF CONTROLLED CIS-1,4 STRUCTURE AND CONFIGURATION WHICH COMPRISES CONTACTING BUTADIENE IN A HYDROCARBON MEDIUM INERT TO POLYMERIZATION AT A TEMPERATURE BETWEEN -10* AND 90*C. WITH A CATALYST COMPRISING TITANIUM TETRAHALIDE AND AN ETHER-FREE ORGANOMAGNESIUM COMPOUND OF THE FORMULA R2MG AND RMGX WHEREIN R IS A HYDROCARBYL RADICAL CONTAINING 1-30 CARBON ATOMS, AND X IS SELECTED FROM THE GROUP CONSISTING OF BROMINE, IODINE AND CHLORINE, SAID CATALYST BEING FORMED OF SAID ORGANOMAGNESIUM COMPOUND AND SAID TITANIUM TETRAHALIDE IN A MOL RATIO OF 1:10 TO 10:1 TO GIVE AN ACTIVE FRESH HYDROCARBYLTITANIUM TRIHALIDE COMPLEX CATALYST, WHEREIN AN OXIDIZING AGENT AS A THIRD COMPONENT IS ADDED TO KEEP THE TITANIUM IN THE TETRAVALENT STATE.
References Cited (Backward Citations)
US3424736A
Cited
US3206447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |