Patent ID: 7141527
Filing Date: 2006-11-28
Classification: C08F,Y10S

Abstract:
1. A catalyst system for polymerizing olefins comprising a product obtained by contacting: (A) a metallocene complex of formula (I): wherein (ZR 1 m ) n is a divalent group bridging Cp and A; Z is selected from C, Si, Ge, N or P; R Cp is a substituted or unsubstituted cyclopentadienyl group, optionally condensed to one or more substituted or unsubstituted, saturated, unsaturated or aromatic rings, containing from 4 to 6 carbon atoms, optionally containing one or more heteroatoms; A is selected from —O—, —S—, or —N(R M is selected from a transition metal belonging to group 3, 4, 5, or 6, or a lanthanide or actinide metal of the Periodic Table; L being equal or different from each other, is a monoanionic sigma ligand selected from the group consisting of hydrogen, halogen, —R m is 1 or 2; n is an integer ranging from 0 to 4; r is 0 or 1, with the proviso that n is 0 when r is 0; p is an integer equal to an oxidation state of M minus 2 when r=1, and minus 1 when r=0, and ranges from 1 to 4; (B) an organometallic aluminum compound of formula (II): wherein Ar is a substituted aryl group corresponding to formula (III): wherein R 6 , R 8 and R 10 are selected from the group consisting of hydrogen, halogen, —C(O)R 3 , —OR 3 , —SR 3 , —NR 3 2 and —NO 2 ; R R R x is 2 or 3; y=3 minus x; and (C) water; wherein a molar ratio between the organometallic aluminium compound (B) and the water (C) is between 1:1 and 100:1.