The present invention relates to a new process for preparing a polypropylene using new bis(metallocene) compounds in catalyst compositions. The bis(metallocene) compounds of the invention are homo- or hetero bis(metallocene) molecules in which same or different metallocene moieties are connected by a phenylene bridge. The phenylene bridge is either para-substituted, meta-substituted or ortho-substituted by the two metallocene moieties.
本发明涉及使用新的双(
金属茂)化合物在
催化剂组合物中制备聚
丙烯的新工艺。本发明中的双(
金属茂)化合物是同源或异源的双(
金属茂)分子,其中相同或不同的
金属茂基团通过
苯基桥连接。
苯基桥被两个
金属茂基团取代,可以是对位取代、间位取代或邻位取代。