Metallocene catalyst compositions and polymerization process therewith
This invention relates bisindenyl metallocene catalyst compounds having long (at least 4 carbon atoms) linear alkyl groups substituted at the two position and substituted or unsubstituted aryl groups at the four position and process using such catalyst compounds, particularly in the solution process at higher temperatures.
1. A metallocene catalyst compound represented by one or more of the following formulas:
2. The metallocene catalyst compound of claim 1 , wherein the rac/meso ratio is 10:1 or greater.
3. A catalyst system comprising activator and the metallocene compound of claim 1 , and optional support.
4. The catalyst system of claim 3 , wherein the activator comprises alumoxane, non-coordinating anion activator, or alumoxane and a non-coordinating anion activator.
5. A process to polymerize olefins comprising contacting one or more olefins with the catalyst system of claim 3 .