Novel metallocene compounds are provided which are useful as polymerization catalysts, particularly in the polymerization of addition polymerizable monomers such as olefinic or vinyl monomers. Preferred polymer compositions prepared using the novel catalysts are bimodal or multimodal in nature, typically having a bimodal or multimodal molecular weight distribution. The metallocenes are binuclear or multinuclear, and contain two or more chemically distinct active sites. Methods for synthesizing the novel catalysts are also provided, as are methods for using the novel compounds as homogeneous or heterogeneous polymerization catalysts.
提供了一种新型的
金属茂化合物,可用作聚合催化剂,特别适用于加成聚合单体(如烯烃或
乙烯单体)的聚合反应。使用这种新型催化剂制备的优选聚合物组成具有双峰或多峰性质,通常具有双峰或多峰分子量分布。这些茂
金属化合物是双核或多核的,含有两个或更多
化学上不同的活性位点。还提供了合成新型催化剂的方法,以及将新型化合物用作均相或非均相聚合催化剂的方法。