Process for polymerizing 1,3-butadiene
US4504639A · kind A · utility
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2References
26Claims
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Key dates
| Filing date | Aug 19, 1982 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | Aug 19, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F136/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for polymerizing 1,3-butadiene, comprising bring into contact a 1,2-polymerization catalyst consisting essentially of a soluble cobalt compound, an organic aluminum halide, an organic lithium compound, and carbon disulfide or phenyl isothiocyanate with 1,3-butadiene in a polymerization medium. The process can be applied particularly advantageously in the preparation of 1,2-polybutadiene, and the resultant 1,2-polybutadiene has a content of syndiotactic 1,2-structural units of not less than 90%, a melting point of 200.degree. C. to 220.degree. C., and an intrinsic viscosity [.eta.] of 1.2 to 7.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.