Catalysts that produce polyethylene with broad, bimodal molecular weight distribution
申请人:ExxonMobil Chemical Patents Inc.
公开号:US10882925B2
公开(公告)日:2021-01-05
The present disclosure relates to ansa-metallocene catalyst compounds that include (1) a first indenyl ligand substituted at the 3-position with a substituted or unsubstituted C4-C40 hydrocarbyl group, wherein the hydrocarbyl group is branched at the β-position, and (2) a second indenyl ligand substituted at its 3-position with a substituted or unsubstituted alkyl group or a β-branched alkyl group. Catalyst systems prepared with the catalyst compounds, polymerization methods using such catalyst systems, and polyolefins made using the polymerization methods are also described.
本公开涉及一种ansa-金属环化合物催化剂,其中包括(1)第一个茚基配体,其在3-位被取代或未取代的C4-C40烃基团取代,其中烃基团在β-位分支,并且(2)第二个茚基配体,在其3-位被取代或未取代的烷基团或β-分支烷基团取代。还描述了使用这种催化剂化合物制备的催化系统、使用这种催化系统的聚合方法以及使用聚合方法制备的聚烯烃。