Patent ID: 6372869
Filing Date: 2002-04-16
Classification: C08F,Y10S

Abstract:
An improved process for the polymerization of a polymerizable olefin consisting essentially of one or more of ethylene, propylene or an &agr;-olefin of the formula R150CH&boxH;CH2, wherein R150 is n-alkyl containing 2 to about 20 carbon atoms, using as a polymerization catalyst a complex of a bidentate ligand of a metal selected from the group consisting of nickel, iron, and cobalt, wherein the improvement comprises, using as a chain transfer agent:hydrogen in an amount of about 0.01 to about 50 mole percent of the olefin present; CBr4 in a molar ratio of transition metal compound:CBr4 of about 0.01 to about 1000; or a silane of the formula R1R2R3SiH, wherein R1 is alkyl, R2 is alkyl, and R3 is hydrogen or alkyl, in a molar ratio of transition metal compound:silane of about 0.01 to 100,000.