Patent ID: 6407188
Filing Date: 2002-06-18
Classification: C07C

Abstract:
A process for preparing a branched polyolefin, comprising the steps of: (1) contacting an ethylene oligomerization catalyst and a first monomer component comprising ethylene, under conditions to oligomerize at least a portion of the ethylene to one or more even &agr;-olefins of the general formula R28CH&boxH;CH2 wherein R28 is alkyl containing an even number of carbon atoms, wherein the ethylene oligomerization catalyst comprises an active Fe complex of a ligand of the formula (I): wherein:R1, R2, R3, R4 and R5 are each independently hydrogen, hydrocarbyl, substituted hydrocarbyl, or an inert functional group, provided that any two of R1, R2 and R3 vicinal to one another, taken together may form a ring; and R6 and R7 are aryl or substituted aryl; and (2) contacting an active transition metal copolymerization catalyst, with a second monomer component comprising ethylene, at least a portion of the &agr;-olefin from step (1) and an odd &agr;-olefin of the formula R18CH&boxH;CH2 wherein R18 is alkyl containing an odd number of carbon atoms, under conditions to copolymerize the ethylene, even &agr;-olefin and odd &agr;-olefin to a branched polyolefin.