Patent US3222348A successfully refreshed from Google Patents.
US3222348A
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Polymerization of conjugated diolefins with a cobalt or nickel compound-aluminum halide-tin hydrocarbyl hydride catalyst
Assignee: Shell USA Inc
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Filing: 1962-04-25
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Granted: 1965-12-07
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Expires: 1982-04-25
Abstract
No abstract record available.
Inventors
- 👤 Edward W Duck
- 👤 Jacques A Waterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:24
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F136/00; C08F136/02; C08F136/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A PROCESS FOR THE PREPARATION OF AN ELASTOMER HAVING A CIS 1,4-CONTENT IN EXCESS OF ABOUT 90%, WHICH COMPRISES POLYMERIZING A C4-5 CONJUGATED DIENE AT TEMPERATURES FROM -- 40* TO 150*C. IN THE PRESENCE OF A CATALYST COMPRISING THE REACTION PRODUCT OF ALUMINUM CHLORIDE, A TIN ALKYL HYDRIDE HAVING THE GENERAL FORMULA SN(R)4-X(H)X WHEREIN R IS AN ALKYL RADICAL HAVING 2-6 CARBON ATOMS AND X IS 1-2, AND A HYDROCARBON-SOLUBLE COBALT SALT OF A CARBOXYLIC ACID HAVING AT LEAST 8 CARBON ATOMS PER MOLECULE, THE ATOMIC RATIO OF ALUMINUM TO TIN BEING BETWEEN 0.1:1 AND 5:1 AND THE ATOMIC RATIO OF ALUMINUM PLUS TIN TO COBALT BEING BETWEEN ABOUT 10:1 AND 100,000:1, SAID CATALYST BEING PREPARED IN THE PRESENCE OF A HYDROCARBON DILUENT AND BEING SOLUBLE IN SAID DILUENT.
Claim 2
Dependent Claim
129 words
A PROCESS FOR THE PREPARATION OF AN ELASTOMER HAVING A CIS 1,4-CONTENT IN EXCESS OF ABOUT 90%, WHICH COMPRISES POLYMERIZING A C4-5 CONJUGATED DIENE AT TEMPERATURES FROM -- 40* TO 150*C. IN THE PRESENCE OF A CATALYST COMPRISING THE REACTION PRODUCT OF ALUMINUM CHLORIDE, A TIN ALKYL HYDRIDE HAVING THE GENERAL FORMULA SN(R)4-X(H)X WHEREIN R IS AN ALKYL RADICAL HAVING 2-6 CARBON ATOMS AND X IS 1-2, AND A HYDROCARBON-SOLUBLE COBALT SALT OF A CARBOXYLIC ACID HAVING AT LEAST 8 CARBON ATOMS PER MOLECULE, THE ATOMIC RATIO OF ALUMINUM TO TIN BEING BETWEEN 0.1:1 AND 5:1 AND THE ATOMIC RATIO OF ALUMINUM PLUS TIN TO COBALT BEING BETWEEN ABOUT 10:1 AND 100,000:1, SAID CATALYST BEING PREPARED IN THE PRESENCE OF A HYDROCARBON DILUENT AND BEING SOLUBLE IN SAID DILUENT.
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |