A zinc complex catalyst containing bispyrazolyl ligand for polymerization of ring ester monomers, a method of preparation thereof and a method of preparation of polymer by using the same

摘要

The present invention relates to a zinc complex catalyst containing a non-spirazolyl ligand for producing monomers having a cyclic ester group, in particular lactide, a process for preparing the same, and a process for producing a polymer using the same, and more particularly, A catalyst for the production of a polymer of a monomer having a cyclic ester group consisting of a zinc complex which does not contain a chiral center, wherein the zinc halide compound is bonded to a non-spirazolyl ligand which does not contain a high-tacticity To a method for producing a polymer having a cyclic ester group excellent in conversion ratio, particularly a polylactide.