New ligands and compositions with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, propylene or styrene. The catalysts also polymerize propylene into isotactic polypropylene.
新的
配体和含有桥联双芳香
配体的组合物被披露,这些
配体催化单体聚合成聚合物。这些带有
金属中心的催化剂具有高性能特征,包括更高的共聚单体并入
乙烯/烯烃共聚物中,其中这些烯烃例如为1-
辛烯、
丙烯或
苯乙烯。这些催化剂还将
丙烯聚合成同构聚
丙烯。