Patent ID: 6653417
Filing Date: 2003-11-25
Classification: C07F,C08F

Abstract:
A catalyst composition comprising an activator and a catalyst precursor represented by the following structure:MXxYyZz wherein M is a Group 4, 5 or 6 metal, X, Y and Z are groups independently bound to M; and x, y and z are each 0 or an integer from 1 to 3, provided that the net charge of the catalyst precursor is zero; wherein:(a) X is a moiety having the formula AR4; wherein A is a Group 13 element and each R is independently selected from the group consisting of hydrogen and C1 to C20 hydrocarbyl radicals; provided that at least one R is hydrogen; (b) Y is a bidentate group having the formula (T)t-Dâ€”(E)eâ€”G forming an independent bidentate ligand bound to M through the D group and the G group, wherein:(i) D is selected from the group consisting of boron, carbon, silicon, nitrogen, phosphorous, oxygen and sulfur; (ii) G represents a mono- or polycyclic radical comprising an atom Q, where Q is selected from the group consisting of nitrogen, oxygen, phosphorous and sulfur; (iii) E is a divalent C1 to C10 hydrocarbon group, where e is 0 or 1; and (iv) T is a hydrocarbon or heteroatom-containing hydrocarbon bound to D, where t is a number sufficient to satisfy the valency of the group D; and (c) Z is selected from the group consisting of halogens, alkyls, aryls, amides, phosphides, sulfides, silylalkyls and carboxylates.