abstract |
(57) Abstract: A) rare earth alcoholate, rare earth carboxylate and / or rare earth complex compound with diketone; B) alumoxane; and C) specific area of not less than 10 m 2 / g and 0.3 to 15 ml / catalysts, which are particularly suitable for use in the polymerization of conjugated dienes, in particular butadiene, in the gas phase. |