Half-metallocene catalyst compositions and their polymer...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

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C526S129000, C526S160000, C526S348000, C526S348200, C526S943000, C502S103000, C502S120000, C502S152000, C502S155000

Reexamination Certificate

active

07884165

ABSTRACT:
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 and copolymerization of olefins are also provided.

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