Patent ID: 6228960
Filing Date: 2001-05-08
Classification: C08F

Abstract:
A process for the preparation of an ethylene-propylene (EPM) or an ethylene-propylene-diene (EPDM) elastomeric copolymer in liquid phase, comprising preparing said EPM or EPDM in the presence of;(a) a catalyst consisting essentially of:a compound of vanadium having formula (II)V(L).sub.p (II)wherein p is 3 or 4, and L is a bidentate ligand derived from a 1,3-diketone,a cocatalyst of trimethyl aluminum, anda prepolymer of ethylene, propylene or a mixture thereof; and(b) optionally an activator;wherein said catalyst is insoluble in the reaction environment, and wherein said catalyst is a suspension obtained by mixing, in an atmosphere of ethylene, propylene or a mixture thereof said compound of vanadium having formula (II) and a hydrocarbon solution of trimethyl aluminum.