Patent ID: 6677410
Filing Date: 2004-01-13
Classification: C08F

Abstract:
A solid procatalyst prepared by a process comprising the step of contactingi) a soluble species obtained by reacting at least one transition metal compound of empirical formula MX4 wherein M is selected from the group consisting of titanium, zirconium, and hafnium, and X is a halogen selected from the group consisting of fluorine, chlorine, bromine, and iodine, with at least one alkylating agent of the formula LxERnYmHp, where each L is independently a monoanionic, bidentate ligand bound to E by two atoms selected from the group consisting of oxygen, sulfur, selenium, tellurium, nitrogen, phosphorus, arsenic, antimony, and bismuth, or mixtures thereof, E is selected from the group consisting of boron, aluminum, gallium, and indium, each R is independently a hydrocarbyl group, each Y is independently a monoanionic, monodentate ligand, 00, m&gE;0, p&gE;0 and x+n+m+p=3, in at least one aprotic solvent, with ii) a support.