| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a vinyl-cis-polybutadiene having a further improved tensile stress being an excellent characteristic of a conventional vinyl-cis-polybutadiene. SOLUTION: The method for producing a vinyl-cis-polybutadiene comprises a process for subjecting 1,3-butadiene to 1,2-polymerization in a mixture comprising a hydrocarbon-based organic solvent as a main component into which a syndiotactic-1,2-polybutadiene having a particle diameter of 20-100 nm is dispersed and in which a cis-1,4-polybutadiene is dissolved in the presence of a catalyst obtained from a soluble cobalt compound, an organoaluminum compound represented by the general formula AlR<SB>3</SB>(R is a 1-6C alkyl group, a phenyl group or a cycloalkyl group) and carbon disulfide. COPYRIGHT: (C)2008,JPO&INPIT |
