Patent ID: 7598329

Claim:
A process of manufacturing ultra high molecular weight ethylene polymers comprising predominantly polyethylene, wherein the process comprises reacting ethylene in the presence of a catalyst system which includes a compound of Formula I to produce a polymer having a viscosimetrically determined molecular weight of greater than 1×10 6 g/mol 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 equal to hydrogen or a C 1 -C 20 -carbonaceous group or a halogen atom; R 2 is equal to hydrogen or a C 1 -C 20 carbonaceous group or a halogen atom; R 3 , R 10 are each identical or different and are a C 1 -C 20 carbonaceous group, provided that at least one radical R 3 or R 10 is a C 2 -C 20 carbonaceous group; R 4 , R 5 , R 6 , R 7 , R 8 , R 11 , R 12 , R 13 , R 14 , R 15 are each identical or different and are a 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 the following formulas: whereby: M 2 is either silicon, germanium or tin; and R 16 , R 17 are each identical or different and are each hydrogen or a C 1 -C 20 carbonaceous group or a halogen atom.