Methylene bridged metallocenes as olefin-polymerization...

Details Methylene bridged metallocenes as olefin-polymerization... Methylene bridged metallocenes as olefin-polymerization...

2005-03-29

2005-03-29

Lu, Caixia (Department: 1713)

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

Having alkenyl moiety, e.g., styrene, etc.

C585S435000, C585S436000

Reexamination Certificate

active

06872863

ABSTRACT:
A new class of methylene-bridged metallocenes of formula (I), wherein M is a transition metal of group 3, 4, 5, 6, lanthanide or actinide; X is a monoanionic sigma ligand; R1can be alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl radicals; R2can be halogen, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl radical; p is 0-3; m is 0-2; and n is 0-4. Furthermore, the corresponding ligands, a new process for their preparation and catalysts systems containing said methylene-bridged metallocenes are described.

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