Patent ID: 7579416
Filing Date: 2009-08-25
Classification: C08F

Abstract:
1. A catalyst system for olefin polymerization comprising: an organic transition metal compound selected from the group consisting of transition metal complexes with at least one ligand of the formulae (IVa) to (IVe): where the transition metal is selected from the group consisting of Ti, Zr, Hf, Sc, V, Nb, Ta, Cr, Mo, W, Fe, Co, Ni, Pd, Pt and the elements of the rare earth metals, E R R R R where R 6B and R 5B or R 8B and R 9B may together form a ring system, R R R R R R n n where M Z where: E A R where L k X R R n m where: R X R n m L y [1,3,5-tri(methyl)-1,3,5-triazacyclohexane]chromium trichloride, [1,3,5-tri(ethyl)-1,3,5-triazacyclohexane]chromium trichloride, [1,3,5-tri(octyl)-1,3,5-triazacyclohexane]chromium trichloride, [1,3,5-tri(dodecyl)-1,3,5-triazacyclohexane]chromium trichloride and [1,3,5-tri(benzyl)-1,3,5-triazacyclohexane]chromium trichloride; a cocatalyst comprising: an ionic compound made up of anions of the formula (Ia), where the radicals R Li an inorganic or organic support.