METALLOCENES WITH ARYL-SUBSTITUTED INDENYL DERIVATIVES, METHOD OF SYNTHESIS OF OLEFIN POLYMERS AND CATALYST FOR OLEFINS POLYMERIZATION Russian patent published in 1998 - IPC

FIELD: organic chemistry and technology. SUBSTANCE: invention proposes metallocenes with aryl-substituted indenyl derivatives as ligands and a method of their synthesis and using their as catalysts. Effective catalytic system for polymerization or copolymerization of olefins consists of cocatalyst, mainly aluminoxane or aluminoxane applied on backing and metallocene of the formula (I): where M¹ mean Zr or Hf; R¹ and R² mean halogen or alkyl; R³ means alkyl; R⁴-R¹² mean alkyl or hydrogen and R¹³ means (substituted) alkylene bridge or heteroatom bridge. Metallocenes, in part, zirconocens at temperatures 50-80 C form polymers exhibiting very high molecular mass, high stereotacticity and high melting point in combination with high activity of catalyst. Also, method ensures to avoid deposits formation in reactor. EFFECT: improved method of synthesis and quality of polymers. 13 cl, 30 ex