| 摘要 |
A high cis-1,4-polybutadiene is produced, with reduced gel formation, by preparing a catalyst from (A) a cobalt compound, (B) a trialkyl (C1-10) aluminum compound, (C) a halide compound selected from those of formulae (1) and (2): (1) AlR2mX3-m, and (2) R3-X, wherein R2=C1-10 hydrocarbon, X=halogen, m=0 to 2, R3=C1-40 hydrocarbon, and (D) water in an amount of 0.77 to 1.45 moles per mole of total Al in components (B) and (C); and polymerizing 1,3-butadiene in the presence of the resultant catalyst in a polymerization medium including an alkane, cycloalkane and/or olefin hydrocarbon.
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