Patent ID: 7041756

Claim:
A catalyst component comprising a metallocene compound having a structure defined by the formula: (THI) 2 R″MQ p (1) wherein each THI is a tetrahydroindenyl group and at least one of the THI groups is substituted at the 2- and the 4-position, the substituent at the 4-position having a greater bulk than that or the substituent at the 2-position, R″ is a 1.1′-ethylidene or 1.2′-ethylidene structural bridge extending between the two THI groups, M is a metal selected from Group IIIB, IVB, VB or VIB metals, Q is selected from hydrocarbyl groups having from 1 to 20 carbon atoms, halogen atoms or combinations thereof and p is the valence of M minus 2 wherein the catalyst component is a heterogenous catalyst component.