Patent ID: 6063726
Filing Date: 2000-05-16
Classification: C08F,Y10S

Abstract:
A catalyst for vapor-phase polymerization of ethylene or copolymerization of ethylene with an .alpha.-olefin selected from the group consisting of 1-butene, 1-hexene, 4-methyl-1-pentene and 1-octene, said catalyst comprising:(A) a solid catalyst component obtained by supporting a zirconium compound on a porous inorganic oxide treated with a halogenated aluminoxane represented by formula (II) or (III) ##STR12## wherein R is a methyl group, ethyl group, propyl group or butyl group,X is a chlorine or bromine atom, anda and b, independently from each other, are numbers of 3 to 30, ##STR13## wherein R, X, a and b are as defined with regard to formula (II); and (B) an aluminoxane.