Bridged metallocene catalysts with a pendant group 13 element, catalyst systems containing same, processes for making a polymer product using same, and products made from same
申请人:ExxonMobil Chemical Patents Inc.
公开号:US10851187B2
公开(公告)日:2020-12-01
A metallocene catalyst compound can comprise a structure represented by formula (F-MC) below comprising a first cyclopentadienyl ring with carbon atoms directly connected with R1, R2, R4, and R5, and a second cyclopentadienyl ring with carbon atoms directly connected with R10, R11, R12, and R13, and a bridging group (BG) directly connecting the first and second cyclopentadienyl rings
A catalyst system can include the metallocene compound, a non-coordinating anion type activator comprising a supported alumoxane or aluminum alkyl, and optionally a scavenger. A process for making a polymeric product can comprise: contacting a C2-C22 alpha-olefin feed with the catalyst system to obtain a polymerization reaction mixture; and obtaining a polymer product from the polymerization reaction mixture. A polymer product can be made by the process to exhibit at least an Mn from 7000 g/mol to 70000 g/mol and a PDI from 4.1 to 9.0.
一种茂金属催化剂化合物可以包括以下由下式(F-MC)表示的结构,其中包括第一个环戊二烯基环,其碳原子直接连接到R1、R2、R4和R5,以及第二个环戊二烯基环,其碳原子直接连接到R10、R11、R12和R13,以及直接连接第一个和第二个环戊二烯基环的桥接基团(BG)。
催化剂体系可以包括茂金属化合物,一种非配位阴离子型活化剂,包括支撑的氧化铝烷氧化物或铝烷基,以及可选的清除剂。制备聚合物产品的方法可以包括:将C2-C22α-烯烃原料与催化剂体系接触,以获得聚合反应混合物;并从聚合反应混合物中获得聚合物产品。通过该方法可以制备聚合物产品,其至少具有从7000克/摩尔到70000克/摩尔的Mn和从4.1到9.0的PDI。