COMPOUNDS FORMED BY COMBINING TRANSITION METAL HALIDES OR OXYHALIDES, OR ALUMINIUM CHLORIDE, WITH ALKALINE EARTH METAL HALIDES

摘要

Novel salt-like compounds adapted to be used as component of catalytic systems in the polymerization of ethylenically unsaturated monomers are disclosed: these compounds are obtained by reacting halides of transition metals or of aluminium with halides of alkaline earth metals, in the presence of phosphorous oxychloride or one of its derivatives of the following formulas: or where R, R', R" , RIII and RIV, which are the same or different, can be a halogen atom sample or substituted alkyl or aryl radicals or oxyalkyl or oxyary, radicals, and n is a whole number between 1 and 10; which have the function of solvating agents. Also oxyhalides of transition metals lie within the scope of the invention.