METALLOCENE COMPOUNDS, CATALYSTS COMPRISING THEM, PROCESS FOR PRODUCING AN OLEFIN POLYMER BY USE OF THE CATALYSTS, AND OLEFIN HOMO- AND COPOLYMERS
申请人:Sell Thorsten
公开号:US20110230630A1
公开(公告)日:2011-09-22
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 substituent in the 2-position of the other indenyl ligand can be any C
5
-C
40
hydrocarbon radical with the proviso that this hydrocarbon radical is branched in the β-position and that the β-carbon atom is a quarternary carbon atom and part of a non-cyclic hydrocarbon system. This metallocene topology affords high melting point, very high molar mass homo polypropylene and very high molar mass propylene-based copolymers. Furthermore, the activity/productivity levels of catalysts comprising the metallocenes of the present invention are exceptionally high.
提供了某些金属茂化合物,当其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,可以获得高摩尔质量的同聚物或共聚物,如聚丙烯或丙烯/乙烯共聚物,而不需要在茂环配体的两个可用的2位上的任何一个中引入任何α-支链取代基。其中一个茂环配体的2位上的取代基可以是包括氢、甲基或任何其他未在α位支链的C2-C40碳氢化合物的任何基团,另一个茂环配体的2位上的取代基可以是任何C5-C40碳氢化合物基团,但须满足这个碳氢化合物基团在β位支链,并且β碳原子是一个季铵碳原子,并且是非环烃体系的一部分。这种茂金属拓扑结构可以获得高熔点、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。此外,本发明的金属茂催化剂的活性/生产率水平异常高。