| abstract |
PROBLEM TO BE SOLVED: To provide a precursor catalyst and a catalyst system for olefin polymerization, an olefin polymer polymerized using the precursor catalyst and a catalyst system, and a process. A method for polymerizing an olefin monomer, which comprises reacting ethylene and optionally one or more olefin monomers in the presence of a catalyst system, wherein the catalyst system contains one or more precursor catalysts. Is a metal-ligon complex of formula (I). (In the formula, M is zirconium, L is substituted or unsubstituted (C1 to C40) hydrocarbylene, or substituted or unsubstituted (C1 to C40) heterohydrocarbylene, Z is O, S, -N [( C1-C40) hydrocarbyl]-or-P [(C1-C40) hydrocarbyl]-) [Selection diagram] None |