Metallocene compounds, catalysts comprising them, process for producing an olefin polymer by use of the catalysts, and olefin homo- and copolymers
申请人:Lammus Novolen Technology GmbH
公开号:US08299287B2
公开(公告)日:2012-10-30
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 C2-C40 hydrocarbon which is not branched in the α-position, and the substituent in the 2-position of the other indenyl ligand can be any C4-C40 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.
本发明提供了一种特定的金属茂化合物,当作为支持聚合催化剂中的组分,在工业相关的聚合条件下使用,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,而不需要在茂基配体的两个可用2位之一中的任何一个α-支链取代基。其中一个茂基配体的2位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烃基的任何基团,而另一个茂基配体的2位取代基可以是任何C4-C40烃基,前提是该烃基在β位支链。这种金属茂拓扑结构可以提供高熔点、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/生产率水平非常高。