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.
US9938364B2
申请人:——
公开号:US9938364B2
公开(公告)日:2018-04-10
Avila, David V.; Davies, Alwyn G.; Li, Elizabeth R., Journal of the Chemical Society. Perkin transactions II, 1993, # 3, p. 355 - 362
作者:Avila, David V.、Davies, Alwyn G.、Li, Elizabeth R.、Ng, Kai M.