Patent ID: 6348556
Filing Date: 2002-02-19
Classification: C08F,Y10S

Abstract:
A method for producing an ethylene-aromatic vinyl compound copolymer having an aromatic vinyl compound content of from 1 to less than 55% by molar fraction comprising polymerizing ethylene with from 1 to less than 55% by molar fraction of an aromatic vinyl compound in the presence of a catalyst of a transition metal compound of the following formula (3) or (4) and a cocatalyst: wherein each of Ind1 and Ind2 is an unsubstituted or substituted indenyl group, and Ind1 and Ind2 may be the same or different from each other, Y is a carbon, a silicon, a germanium or a boron atom, which has bonds to Ind1 and Ind2 and which also has substituents, wherein the substituents may be the same or different, or may have a cyclic structure, X is hydrogen, a halogen, an alkyl group, an aryl group, a silyl group or an alkoxy group, and M is Zr, Hf or Ti, wherein Ind is an unsubstituted or substituted indenyl group, Cp is an unsubstituted or substituted cyclopentadienyl group, Y is carbon, a silicon, a germanium or a boron atom, which has bonds to Ind and Cp and which also has substituents, wherein the substituents may be the same or different, or may have a cyclic structure, X is hydrogen, a halogen, an alkyl group, an aryl group, a silyl group, or an alkoxy group, and M is Zr, Hf or Ti.