Resumen

The invention relates to heterogeneous catalytic systems obtainable by reacting a porous inorganic support with an alumoxane and subsequently supporting at least one metallocene compound thereon, characterized in that the metallocene compound is defined by the following general formulas: wherein: L, equal to or different from each other, is selected from the group comprising: cyclopentadienyl, indenyl, tetrahydroindenyl, fluorenyl, octahydrofluorenyl or benzoindenyl; each R is independently selected from hydrogen, C1-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, C3-C20 alkenyl, C7-C20 arylalkyl, C7-C20 alkylaryl, C8-C20 arylalkenyl, linear or branched, optionally substituted by 1 to 10 halogen atoms, or a group SiR<II>3; each R<I>, equal to or different from each other, is a divalent aliphatic or aromatic hydrocarbon group containing from 1 to 20 carbon atoms, optionally containing from 1 to 5 heteroatoms of groups 14 to 16 of the periodic table of the elements and boron ; preferably it is: C1-C20 alkylene, C3-C20cycloalkylene, C6-C20 arylene, C7-C20 alkenyl, C7-C20 arylalkylene, or alkylarylene, linear or branched, or a group SiR<II>2; each R<II >is independently selected from C1-C20 alkyl , C3-C20 cycloalkyl, C6-C20 aryl, C3-C20 alkenyl, C7-C20 arylalkyl, C8-C20 arylalkenyl or C7-C20 alkylaryl, linear or branched; preferably R<II >is methyl, ethyl, isopropyl; each Q is independently selected from B, C, Si, Ge, Sn; M is a metal of group 3, 4 or 10 of the Periodic Table, Lanthanide or Actinide; preferably it is titanium, zirconium or hafnium; each X is independently selected from: hydrogen, chlorine, bromine, OR<II>, NR<II>2, C1-C20 alkyl or C6-C20 aryl; L&p