Metallocene compositions

Details Metallocene compositions Metallocene compositions

2005-05-03

2005-05-03

Bell, Mark L. (Department: 1755)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

C556S012000, C556S022000, C556S023000, C556S043000, C556S053000, C556S058000

Reexamination Certificate

active

06888017

ABSTRACT:
This invention relates to bridged indenyl metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization. The bridge may be represented by the formula:wherein: R17to R24are identical or different, and are one of a hydrogen atom, a C1-C10alkyl group, a C1-C10alkoxy group, a C6-C10aryl group, a C6-C10aryloxy group, a C2-C10alkenyl group, a C7-C40arylalkyl group, a C7-C40alkylaryl group, a C8-C40arylalkenyl group, or a halogen atom, or together are a conjugated diene which is optionally substituted with one or more hydrocarbyl, tri(hydrocarbyl)silyl groups or hydrocarbyl, tri(hydrocarbyl)silylhydrocarbyl groups, said diene having up to 30 atoms not counting hydrogen;or two or more adjacent radicals R17to R24, including R20and R21, together with the atoms connecting them form one or more rings; and M2is carbon, silicon, germanium or tin.

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