A solid catalyst component useful for the (co)-polymerization of olefins is disclosed. The catalyst component is prepared by reacting an activated magnesium halide composite support with a halogenized transition metal compound and a chelating diamide compound in the presence of organo-magnesium as a promoting agent and halogenized silicon or boron compounds as an activator. The catalyst component can be used with an organo-aluminum compound to provide a solid catalyst system that is compatible with slurry and gas phase polymerization processes. Linear low density polyethylene (LLDPE) produced using the catalyst component of the present invention displays a low molecular weight distribution, improved co-monomer incorporation, low content of the low molecular weight component, and excellent morphological properties such as spherical shape and high bulk density.
本发明公开了一种用于烯烃(共)聚合的固体催化剂组分。该催化剂组分是在
有机镁作为
促进剂和卤化
硅或
硼化合物作为活化剂的存在下,通过活化卤化
镁复合载体与卤化过渡
金属化合物和螯合二酰胺化合物反应制备的。催化剂组分可与
有机铝化合物一起使用,以提供一种与浆料和气相聚合工艺兼容的固体催化剂体系。使用本发明的催化剂组分生产的线性低密度聚
乙烯(LLDPE)具有分子量分布低、共聚单体掺合度提高、低分子量组分含量低以及球形和高体积密度等优异的形态特性。