Patent ID: 6531556
Filing Date: 2003-03-11
Classification: C08F

Abstract:
A process for radical polymerization or copolymerization of ethylene, which comprises (co)polymerizing monomer(s) comprising ethylene under high pressure in the presence of at least one initiating free radical (Zâ€¢) and of at least one controlling stable free radical (SFRâ€¢) which comprises an indoline nitroxide backbone represented by the formula (I): in which A is an aromatic ring including two carbon atoms which also form the nitrogenous ring, this ring A may carry substituent(s) or may carry one or more rings placed side by side, which rings are aromatic or aliphatic and optionally substituted, and the carbon atoms forming the nitrogenous ring in the alpha- and beta-position with respect to the nitrogen atom may carry hydrogen atoms or substituents: