Metallocene compounds

Details Metallocene compounds Metallocene compounds

2007-03-05

2010-12-28

Choi, Ling-Siu (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

active

07858717

ABSTRACT:
A bridged metallocene compound of formula (I)wherein:M is an atom of a transition metal selected from those belonging to group 3, 4, or to the lanthanide or actinide groups in the Periodic Table of the Elements;X, equal to or different from each other, is a hydrogen atom, a halogen atom, a R, OR, OSO2CF3, OCOR, SR, NR2or PR2group; L is a divalent bridging group;R1and R2, equal to each other, are C1-C40hydrocarbon radical; R3 is hydrogen or a are C1-C40hydrocarbon radical and W is an aromatic 5 or 6 membered ring.

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