Patent ID: 6753436
Filing Date: 2004-06-22
Classification: C07F,C08F,Y10S

Abstract:
Olefin polymerization catalyst component comprising an organometallic compound of general formula (I) whereinM is a transition metal selected from the group consisting of groups 3, 4-10, lanthanide, and actinide of the periodic table of the elements; each R is independently a structural bridge rigidly connecting two ligands L1, L2 and L3 and is constituted by 1 to 4 chain atoms selected from the group consisting of carbon, silicon, germanium, oxygen, and boron; m, n and o are 0 or 1, with the proviso that m+n+o is 2 or 3; L1 is a ligand of the cyclopentadienyl-type ligand or is isolobal to cyclopentadienyl; L2 is a ligand of the cyclopentadienyl-type ligand, is isolobal to cyclopentadienyl, or is a monovalent anionic ligand selected from the group consisting of N, P, and B when m+n=2, or L2 is selected from the group consisting of NR1, PR1, BR1, O and S when m+n=1; L3 is a monovalent anionic ligand selected from the group consisting of N, P, and B when n+o=2, L3 is selected from the group consisting of NR1, PR1, BR1, O and S when n+o=1; R1 is hydrogen, C1-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, or C3-C20 alkenyl, optionally comprising 1 to 5 heteroatoms selected from the group consisting of Si, N, P, O, F, Cl, and Br; each X is independently selected from the group consisting of hydrogen, halogen, NR22, and R2, wherein R2 is equal to C1-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, or C3-C20 alkenyl optionally comprising 1 to 5 heteroatoms selected from the group consisting of Si, N, P, O, F, Cl, and Br; q is a number whose value is: 0, 1, 2 or 3, depending on a valency of the metal M; D is a neutral Lewis base; and p is a number whose value is 0, 1, 2 or 3.