| 摘要 |
<p>A high cis-1,4-polybutadiene is produced, with a 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 the formulae (1) and (2): AlR<2>mX3-m(1), R<3>-X(2), wherein R<2> = C1-10 hydrocarbon, X = halogen, m = 0 to 2, R<3> = C1-40 hydrocarbon, and (D) water in an amount of 0.77 to 1.45 moles per mole of total Al in the component (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.</p> |
