Half-metallocene compounds and catalyst compositions

摘要

The present invention provides polymerization catalyst compositions employing half-metallocene compounds with a heteroatom-containing ligand bound to the transition metal. Methods for making these hybrid metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins also are provided.

主权项

1. A catalyst composition comprising a hybrid metallocene compound and an activator, wherein the hybrid metallocene compound has the formula:wherein:
M is Zr or Hf; X1 and X2 independently are a halide or a substituted or unsubstituted aliphatic, aromatic, or cyclic group, or a combination thereof; and X3 is a substituted or unsubstituted cyclopentadienyl, indenyl, or fluorenyl group, wherein any substituents on X3 independently are a hydrogen atom or a substituted or unsubstituted aliphatic, aromatic, or cyclic group, or a combination thereof.