Certain metallocene compounds are provided that, when used as a component in a supported polymerization catalyst under industrially relevant polymerization conditions, afford high molar mass homo polymers or copolymers like polypropylene or propylene/ethylene copolymers without the need for any α-branched substituent in either of the two available 2-positions of the indenyl ligands. The substituent in the 2-position of one indenyl ligand can be any radical comprising hydrogen, methyl, or any other C
2
-C
40
hydrocarbon which is not branched in the α-position, and the substituent in the 2-position of the other indenyl ligand can be any C
4
-C
40
hydrocarbon radical with the proviso that this hydrocarbon radical is branched in the β-position. This metallocene topology affords high melting point, very high molar mass homo polypropylene and very high molar mass propylene-based copolymers. The activity/productivity levels of catalysts including the metallocenes of the present invention are exceptionally high.
提供了某些
金属茂化合物,当它们作为支持的聚合催化剂的组分在工业相关的聚合条件下使用时,可以得到高摩尔质量的同聚物或共聚物,例如聚
丙烯或
丙烯/
乙烯共聚物,而不需要在茂基
配体的两个可用的2位上任何α-支链取代基。一个茂基
配体的2位上的取代基可以是包括氢、甲基或任何未在α位支链的C2-C40碳氢化合物的任何基团,另一个茂基
配体的2位上的取代基可以是任何C4-C40碳氢化合物基团,但该碳氢化合物基团在β位上支链。这种
金属茂拓扑结构可以得到高熔点、非常高摩尔质量的同聚
丙烯和非常高摩尔质量的基于
丙烯的共聚物。包括本发明的
金属茂烯的催化剂的活性/生产率
水平异常高。