PRELIMINARY POLYMERIZED CATALYTIC COMPOSITION, METHOD FOR ITS PRODUCTION AND METHOD FOR PRODUCTION OF POLYOLEFFINS Russian patent published in 1997 - IPC

FIELD: gas phase (co)polymerization of alpha-oleffins. SUBSTANCE: (co)polymerization is carried out in the presence of preliminary polymerized catalytic composition. Said catalytic composition is prepared by (co)polymerization of C₂-C₁₂-α-olefins which takes place in the presence of catalyst comprising compound of transition metal from IV-VI group of Periodic Table and organometallic compound of metal from II-III group of Periodic Table and additive which is fed at the stage of formation of catalyst. Antistatic agent being chosen of group which comprises salts of C₁₄-C₁₈-alkyl salicic acid, calcium dialkyl sulfosuccinate, copolymer of alkyl methacrylate with 2-methyl-5-vinyl pyridine, chromium-N-alkyl anthranilate and mixture of chromium oleyl anthranilate, CO-N-lauroyl sarconisate and di-tert-butyl phenol is used as mentioned above additive. EFFECT: improved quality of desired product, improved efficiency of the method. 11 cl