Mono-metallocene catalyst as well as preparation method and application thereof

The invention provides a single metallocene catalyst as well as a preparation method and application thereof. The single metallocene catalyst has a structure as shown in a general formula (I). Compared with other types, the half-metallocene catalyst with the specific structure (the types of X1, X2, R1, R2, E, R3, R4, J and R5 are strictly limited in the application range) has better catalytic activity, the copolymerization activity of ethylene and alpha-olefin can be improved when the half-metallocene catalyst is applied to the field of copolymerization reaction, insertion of a large-steric-hindrance alpha-olefin chain segment is facilitated, and the copolymerization reaction efficiency is improved. Therefore, the content of alpha-olefin chain segments in a polymerization product is increased, and the comprehensive performance of the polymerization product is improved. # imgabs0 # 本发明提供了一种单茂茂金属催化剂、其制备方法及应用。该单茂茂金属催化剂具有通式(I)所示结构。相比于其它种类，具有本申请特定结构(严格限制X1、X2、R1、R2、E、R3、R4、J和R5的种类在本申请范围内)的单茂茂金属催化剂具有更好的催化活性，将其应用在共聚