Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | HCID 86733047 | HCID 86733047 | — |
| Reactant | Butyllithium | HCID 178418339 | — |
| Catalyst | Nickel | HCID 935 | — |
| Solvent | Hexane | HCID 8058 | — |
| Product | Isoprene | HCID 6557 | — |
| Product | 1,3-Butadiene | HCID 7845 | — |
Reaction Conditions
| Temperature | 160 fahrenheit |
|---|
Reaction Steps
To a 20-gallon reactor forty pounds of hexane and 110.7 ml. of 15% n-butyllithium are charged. Then the temperature of the mixture is raised to 160°F. and metering of a blend of isoprene/butadiene/hexane (20/30/50) is started. Over a 3 hour period total of 45 pounds of the blend is charged with the temperature maintained at 160°F. The polymer obtained by this method is hydrogenated with Ni catalyst to complete hydrogenation level. The resulting polymer does not show properties of a thermoplastic elastomer. Differential thermal analysis shows that the polymer has a Tg of -55°C but no melting point. These results demonstrate that a copolymer obtained by the simultaneous copolymerization of butadiene and isoprene does not have the desirable properties obtained in the multiblock copolymer obtained in Example III.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
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| Patent number | US03937760 |
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| Source dataset | uspto-grants-1976_02 |
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| ORD ID | ord-b5bc8b8bdeb34346911bde99380786d3 |
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| Source note | uspto-grants-1976_02 |
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