Complex polymerization catalysts for the homopolymerization of ethylene and for the copolymerization of ethylene.

摘要

complex catalysts for ethylene homopolymer and ethylene for copolymerization with another unsaturated monomer, characterized in that they have the following formula ** ** wherein: M is Ni, X is halogen, Y is selected from N, O and S, r, and R, same or different, are selected from hydrogen, linear or branched alkyl groups, cycloalkyl and aryl, said groups containing 1 to 10 carbon atoms, being optionally halogenated, R r, and the same or different, are selected from hydrogen and aryl groups or are linked together to form a fused benzene ring, said aryl or said fused benzene ring optionally substituted with linear or branched groups groups containing from 1 to 10 carbon atoms being.