USABLE SUPPORTED SOLID CATALYST FOR THE POLYMERISATION OF CONJUGATED DIENOS, PROCEDURE FOR ITS PREP

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Supported solid catalyst, usable for the polymerisation of conjugated dienos, characterized because a complex represented by formula M includes the product of the reaction of A) (Ar) (AlX4) 3, in which M is a rare earth metal, selected between the metals that have a included atomic number between 57 and 71 in the periodic system of elements of Mendeleev, in which Ar is an aromatic hydrocarbon dissolvent, in which To it is an aluminum atom, and in that X is an atom of a halogen that can be fluorine, chlorine, bromine or iodine; B) a solid support that includes an inorganic metallic oxide compound, at least.