Olefin polymeric catalyst with multidentate ligand


Application Number  00129479 Application Date  2000.12.29
Publication Number  1322763 Publication Date  2001.11.21
Priority Information   1993/3/23 JP 086833/1993; 1993/7/9 JP 170194/1993  
International
Classification
 C08F4/642;C08F10/00  
Applicant(s) Name  Asahi Kasei K.K.  
Address    
Inventor(s) Name  Aoki Choya;Kanashima Setsutaka  
Patent Agency Code  11038 Patent Agent  li yong
AbstractDisclosed is an olefin polymerization comprising a transition metal and ligands L1 and L2 bonded thereto, wherein a combination of L1 and L2 is (1) a combination of ligand L1 which is a group containing one phosphorus-containing group and ligand L2 which is a ligand having a sigma -bond, or a ligand having a sigma -bond and a bond selected from at least one pi -bond and at least one lone electron pair donative bond; (2) a combination of ligand L1 which is a 5-membered heterocyclic pentadentate ligand and ligand L2 which is a ligand having a sigma -bond, or a ligand having a sigma -bond and a bond selected from at least one pi -bond and at least one lone electron pair donative bond, provided that when the pentadentate ligand contains only one heteroatom, L2 is a ligand having a sigma -bond, or a ligand having a sigma -bond and at least one lone electron pair donative bond; and (3) a combination of ligand L1 which is a trispyrazolyl tridentate ligand and ligand L2 which is an alkapolyenyl ligand, and wherein each L1 contains an element of Group VB or Group VIB. By the method of the present invention, a desired olefin polymer can be produced efficiently with a high productivity per unit by weight of the catalyst.