METALLOCENE COMPOUNDS, CATALYSTS COMPRISING THEM, PROCESS FOR PRODUCING AN OLEFIN POLYMER BY USE OF THE CATALYSTS, AND OLEFIN HOMO- AND COPOLYMERS
申请人:Dimeska Anita
公开号:US20120329964A1
公开(公告)日:2012-12-27
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,可以产生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,而不需要在两个可用的茚基配体的任一2-位置中引入任何α-支链取代基。一个茚基配体的2-位置的取代基可以是包括氢、甲基或任何其他不在α-位置支链的C2-C40烃基的任何基团,另一个茚基配体的2-位置的取代基可以是任何C4-C40烃基,条件是这个烃基在β-位置有支链。这种金属茂拓扑结构可以产生高熔点、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化合物的催化剂的活性/生产率水平异常高。