US3242156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of cis-1, 4-polybutadiene
Assignee: Snam SpA
•
Filing: 1962-04-13
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Granted: 1966-03-22
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Expires: 1982-04-13
Abstract
No abstract record available.
Inventors
- 👤 Marconi Walter
- 👤 Beranger Alessandro
- 👤 Malde Marcello De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:03
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PROCESS FOR THE PRODUCTION OF A LINEAR POLYBUTADIENE CONTAINING AT LEAST 88% OF THE 1,4-CIS ISOMER WHICH CONSISTS IN (A) FORMING A CATALYST BY REACTING TOGETHER IN AN AROMATIC HYDROCARBON AT AN ELEVATED TEMPERATURE AND UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS (1) A TITANIUM CHLORIDE SELECTED FROM THE GROUP CONSISTING OF TITANIUM TRICHLORIDE AND TITANIUM TETRACHLORIDE, (2) A HYDRIDE OF ALUMINUM AND AN ALKALI METAL WHICH IS INSOLUBLE IN THE DILUENT AND IS INTRODUCED IN THE SOLID STATE, AND (3) IODINE, THE MOLAR RATIO OPF TI TO I2 BEING WITHIN THE RANGE 1:1 TO 20:1, AND THE MOLAR RATIO OF A1 TO I2 BEING WITHIN THE RANGE 1:1 TO 10:1, (B) POLYMERIZING MONOMERIC BUTADIENE IN THE PRESENCE OF SAID CATALYST, AND (C) THEREAFTER ISOLATING POLYBUTADIENE PREDOMINATING IN THE 1,4-CIS ISOMER FROM THE RACTION PRODUCT.
Claim 2
Dependent Claim
133 words
A PROCESS FOR THE PRODUCTION OF A LINEAR POLYBUTADIENE CONTAINING AT LEAST 88% OF THE 1,4-CIS ISOMER WHICH CONSISTS IN (A) FORMING A CATALYST BY REACTING TOGETHER IN AN AROMATIC HYDROCARBON AT AN ELEVATED TEMPERATURE AND UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS (1) A TITANIUM CHLORIDE SELECTED FROM THE GROUP CONSISTING OF TITANIUM TRICHLORIDE AND TITANIUM TETRACHLORIDE, (2) A HYDRIDE OF ALUMINUM AND AN ALKALI METAL WHICH IS INSOLUBLE IN THE DILUENT AND IS INTRODUCED IN THE SOLID STATE, AND (3) IODINE, THE MOLAR RATIO OPF TI TO I2 BEING WITHIN THE RANGE 1:1 TO 20:1, AND THE MOLAR RATIO OF A1 TO I2 BEING WITHIN THE RANGE 1:1 TO 10:1, (B) POLYMERIZING MONOMERIC BUTADIENE IN THE PRESENCE OF SAID CATALYST, AND (C) THEREAFTER ISOLATING POLYBUTADIENE PREDOMINATING IN THE 1,4-CIS ISOMER FROM THE RACTION PRODUCT.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |