Catalyst to polymerize olefins and conjugated dienes in heterogeneous phase, process for obtaining and using the same

A catalyst for the heterogeneous phase olefins and conjugated dienes polymerization, comprising:

• a) a pre-catalyst consisting of a mixture of metallocene hydride-alumohydride compounds represented by the following formulae:
• (CpRx)Ty(CpR′z)MHAlH4 (I)
• [(CpRx)Ty(CpR′z)MHAlH4]2 (II)
• [(CpRx)Ty(CpR′z)MH]2AlH5 (III)
• wherein, M is a transition metal selected from the group consisting of Ti, Zr and Hf in its oxidation state of +4;
• Cp is either i) a cyclopentadienyl ring, unsubstituted or substituted with R or R′;
• or ii) a cyclopentadienyl ring wherein two neighboring rings are attached forming from 4 to 20 carbon atoms cycles such that saturated or unsaturated polycyclic cyclopentadienyl links are formed;
• R and R′ are cyclopentadientyl ring substituents which are selected from the group consisting of hydrocarbon radicals wherein one or more hydrogen or carbon atoms are replaced heteroatoms containing radicals selected from the 13 to 17 groups of the periodic table, and heteroatoms substituted with hydrogen or substituted with hydrocarbon radicals;
• R and R′ are the same or different;
• “x” and “z” are integers ranging from 0 to 5, and denoting the substitution level for the cyclopentadienyl rings.
• T is a straight or branched, cyclic or acyclic, bridged covalent group bonding the cyclopentadienyl rings (Cp);
• and,
• “y” is an integer which may be 0 or 1;
• b) a modified silica to immobilize the pre-catalyst;
• and,
• c) a co-catalyst selected from methylaluminoxane (MAO), modified methylaluminoxane (MMAO) and a boride compound of the general formula B(C6H5-KFk)3 or PB(C6H5-KFk)4;
• wherein K is an integer ranging from 0 to 5;
• and, P is a cation capable of taking off an hydride atom forming a neutral species not showing a Lewis' basic functionality.