Catalyst system comprising magnesium halide

摘要

A supported catalyst system comprising the product obtainable by contacting an adduct of formula (I) MgT_2a.yAlQ_j(OU)_3-j (I) wherein T is chlorine, bromine, or iodine; U is a linear or branched C₁-C₁₀ alkyl radical, y ranges from 6.00 to 0.05; j ranges from 3 to 0.1; Q substituents, are hydrocarbon radicals containing from 1 to 20 carbon atoms; with at least one compound selected from the compounds of formula (II), (III) and (IV) wherein M¹ is a transition metal atom selected from Groups 3-11 of Periodical Table; each R¹, R², R³, R⁴, R⁵ and R⁸ is a hydrogen atom, a halogen atom or a hydrocarbon group; L and L¹ are divalent or trivalent hydrocarbon groups; T¹ is a Lewis base; A1 and A2 are oxygen sulfur or nitrogen containing groups and X is hydrogen halogen or hydrocarbon group.