SUPPORTED METALLOCENE-ALUMOXANE CATALYSTS FOR THE PREPARATION OF POLYETHYLENE HAVING A BROAD MONOMODAL MOLECULAR WEIGHT DISTRIBUTION

摘要

The present invention relates to the production of high density polyethylene homopolymers or copolymers having a broad and monomodal molecular weight distribution wherein the polymerization process is conducted in the presence of supported metallocene-alumoxane catalysts wherein the metallocene is bridged, comprises at least a hydrogenated indenyl or fluorenyl and is isolated on its support under the form of all its conformers.