Patent ID: 6962890

Claim:
An olefin polymerization catalyst comprising a transition metal compound which is represented by the following formula (I-b) and in which the net charge parameter of the central metal M is in the range of 1.80 to 1.89: wherein M is a transition metal atom of Group 4 to Group 5 of the periodic table, m is an integer of 1 to 5, A is an oxygen atom, R 1b is an alicyclic hydrocarbon group having at least 7 carbon atoms which may be substituted with an aromatic hydrocarbon group or an aliphatic hydrocarbon group, R 2 and R 7 are each a hydrogen atom, R 6 , R 8 and R 9 may be the same or different, they are each a hydrogen atom, a hydrocarbon group, an oxygen-containing group, a nitrogen-containing group, a sulfur-containing group, a boron-containing group, an aluminum-containing group, a phosphorus-containing group, a halogen-containing group, a heterocyclic compound residual group, a silicon-containing group, a germanium-containing group or a tin-containing group, two or more of them may be bonded to each other to form a ring, and when m is 2 or greater, at least one of groups indicated by R 6 , R 8 and R 9 contained in one ligand and at least one of groups indicated by R 6 , R 8 and R 9 contained in another ligand may be bonded to each other, when m is 2 or greater, R 1b s, R 6 s, R 8 s, or R 9 s may be the same or different, n is a number satisfying a valence of M, and X is a hydrogen atom, a halogen atom, a hydrocarbon group, an oxygen-containing group, a sulfur-containing group, a nitrogen-containing group, a boron-containing group, an aluminum-containing group, a phosphorus-containing group, a halogen-containing group, a heterocyclic compound residual group, a silicon-containing group, a germanium-containing group or a tin-containing group, and when n is 2 or greater, plural groups indicated by X may be the same or different and plural groups indicated by X may be bonded to each other to form a ring.