PROCATALYST COMPRISING BIDENTATE LIGAND, CATALYST SYSTEM, AND USE IN OLEFIN POLYMERIZATION

摘要

PROBLEM TO BE SOLVED: To provide solid procatalysts which provide catalyst systems suitable for olefine polymerization or interpolymerization with cocatalysts.SOLUTION: The solid procatalyst is prepared by reacting at least one transition metal compound of empirical formula MLX(in the formula, M is titanium, zirconium, or 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 fluoride, chloride, bromide, or iodide, and 0x≤4) with at least one alkylating agent of formula LERYH(in the formula, 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 boron, aluminum, gallium, or indium; each R is independently a hydrocarbyl group; each Y is independently a monoanionic, monodentate ligand, where 0x≤2, n0, m≥0, p≥0, and x+n+m+p=3) in at least one aprotic solvent to provide a soluble species which is subsequently contacted with a support.