Patent ID: 6696380
Filing Date: 2004-02-24
Classification: C08F

Abstract:
A solid procatalyst prepared by contactingi) a soluble species obtained by reacting at least one transition metal compound of empirical formula MLxX4-x wherein M is selected from the group consisting of titanium, zirconium, and hafnium, each L is independently a monoanionic, bidentate ligand bound to M by two atoms selected from the group consisting of oxygen, sulfur, selenium, tellurium, nitrogen, phosphorus, arsenic, antimony, and bismuth, or mixtures thereof, X is a halogen selected from the group consisting of fluorine, chlorine, bromine, and iodine, and 0xERnYmHp, 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, H is hydrogen, 0ii) a support.