METALLOCENE CATALYST HAVING MULTI-NUCLEAR CONSTRAINED GEOMETRY AND COPOLYMER OF ETHYLENE/AROMATIC VINYL COMPOUNDS BY USING THE SAME

摘要

PURPOSE: A metallocene catalyst useful in the production of copolymer comprising ethylene/aromatic vinyl compounds having constrained geometry is provided to enable the copolymer to have high isotacticity and alternating index by connecting at least two transition metal compounds having the constrained geometry. CONSTITUTION: The multi-nuclear constrained geometry metallocene catalyst useable in the production of specific copolymer having excellent isotacticity and alternating index respresents formula 1 (wherein M is same or different and Ti, Zr or Hf; Cp1 is cyclo pentadienyl groups with no substituent and/or having 1-4 alkyl substituent radicals with or without cyclic structure, or indenyl or fluorenyl groups with or without any substituent radicals; Y is hydrogen, C1-C10 sillyl, alkyl, aryl groups or combination of those; A is hetero atom such as N, O, P or S; X is hydrogen, halogen, alkyl or aryl groups or combination of those; and G is C1-C30 alkyl, cycloalkyl, aryl or alkylamine groups) and includes two transition metals in a single molecular by mutual coupling of ligands connected to core metal of the transition metals.