A homogeneous earth catalyst and its application in the conjugated diene polymerization

The present invention relates to a homogeneous catalyst and Application of a rare earth, particularly relates to a novel rare earth catalysts and homogeneous in the conjugated diene polymerization. With this homogeneous rare earth catalyst, while ensuring a high catalytic activity and stable catalytic performance at the same time, by varying the ratio of each component of the catalyst and polymerization conditions can be prepared cis 1,4 structure content of greater than 98%, a weight-average molecular weight the adjustable range of 40 to 2,000,000 molecular weight distribution of 1.5 to 3.0, and a relatively low viscosity of the polymer system.