申请人:ExxonMobil Chemical Patents Inc.
公开号:US20170015767A1
公开(公告)日:2017-01-19
This invention relates to novel bridged a hafnium transition metal metallocene catalyst compounds having two indenyl ligands substituted at the 4 position, preferably 4 and 7 positions, with a C
1
to C
10
alkyl, where the 2 and 3 positions are hydrogen (assuming the bridge position is counted as the one position) and the bridging atom is carbon or silicon which is incorporated into a cyclic group comprising 3, 4, 5, or 6 silicon and/or carbon atoms that make up the cyclic ring.