OLEFIN POLYMERIZATION CATALYST HAVING NEW POLYDENTATE LIGAND

摘要

PROBLEM TO BE SOLVED: To provide a transition metal-based olefin polymerization catalyst having a new polydentate ligand, giving high polymer yield per catalyst weight, affording a high-molecular weight olefinic polymer, having high stability under polymerization conditions, enabling the molecular weight of the polymer to be controlled by hydrogenation, and capable of reducing the amount of a cocatalyst alkyl aluminoxane or the like to be used. SOLUTION: This catalyst consists of at least one transition metal compound selected from groups 3, 4, 5, 6, 7 and 8 transition metal compounds including lanthanum series and having the new polydentate ligand L1containing a group 5B or 6B element and a ligand L2; wherein the combination of these two ligands is such that the ligand L1is a trispirazolyl tridentate ligand and the ligand L2is an alkapolyenyl ligand having aσ-bond and at least twoπ-bonds. COPYRIGHT: (C)2003,JPO