Patent ID: 8034886

Claim:
A process of manufacturing high, very high, and ultra high molecular weight polymers comprising predominantly ethylene monomers, wherein the process comprises reacting ethylene monomers, and optionally additional olefin monomers, in the presence of a catalyst system which includes a catalytic compound of Formula I to produce a polymer having a viscosimetrically-determined molecular weight of 0.7×10 6 g/mol or greater whereby: M 1 is a transition metal of the 4 th to 6 th group of the periodic table, wherein the oxidation level of said transition metal does not equal zero; R 1 is hydrogen or a C 1 -C 20 -carbonaceous group or a halogen atom; R 2 is hydrogen or a C 1 -C 20 carbonaceous group or a halogen atom; R 3 and R 10 are each identical or different and are each a C 1 -C 20 carbonaceous group; R 4 , R 5 , R 6 , R 7 , R 8 , R 11 , R 12 , R 13 , R 14 , and R 15 are each identical or different and are each hydrogen or a halogen atom or a C 1 -C 20 carbonaceous group, whereby, optionally, two or several consecutively form a cyclic system; and R 9 is a bridge between the ligands, which is represented by one of the following formulas: whereby: M 2 is either silicon, germanium or tin; and R 16 and R 17 are each identical or different and are each hydrogen or a C 1 -C 20 carbonaceous group or a halogen atom; with the proviso that when R 5 or R 12 constitutes a phenyl group supporting an alkyl group, the alkyl group is present in a para position.