Explanation

It is a kind of olefin polymerization catalyst mainly composed of dicyclopentadienyl coordinated metal complexes and promoter methylaluminoxane or boron compounds. metallocene catalyst has the advantages of high catalytic activity, multiple monomer, single active site and precise control of polymer structure. The microstructure of special polymer can be designed by changing the structure of metallocene ligand. For example, the catalyst composed of dicyclopentadienyl zirconium dichloride and flat aluminoxane is ten times more active than Ziegler catalyst for ethylene polymerization. metallocene catalyst can synthesize a series of new polyolefin products, such as metallocene polyethylene, metallocene polypropylene and metallocene polystyrene, syndiotactic polypropylene, syndiotactic polystyrene, cycloene copolymer, optically active oligomer, polymethylene, etc.

Classification