| abstract |
The present invention relates to novel bridged hafnium transition metal metallocene catalyst compounds having two indenyl ligands having a C1 - C10 alkyl group substituted at the 4-position, wherein the 3-position is hydrogen (assuming the bridging position counts as the 1-position) ) and the bridging atom is carbon or silicon incorporated into a cyclic group containing 3, 4, 5 or 6 silicon and/or carbon atoms forming the cyclic ring. |