COMPOSITION OF POLYMERISATION CATALYST, METHOD OF PRODUCING SYNTHETIC POLYISOPRENE AND SYNTHETIC PO

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FIELD : chemistry. SUBSTANCE : invention relates to a polymerisation catalyst composition. Composition contains a rare earth element compound (component (A)) represented by general formula (i) : wherein M is at least one element selected from a lanthanide, scandium and yttrium, and NQ1, NQ2, and NQ3 is an amide group and can be identical or different from each other, and there is an M-N bond; at least one compound (component (B)) selected from an ionic compound; compound (component (C)) represented by general formula (X) : where Y is a metal selected from group 13 of Periodic Table; R1 and R2 are a hydrocarbon group with 1-10 carbon atoms or a hydrogen atom; R3 is a hydrocarbon group with 1-10 carbon atoms; R1, R2 and R3 may be identical different from each other; a, b and c are all equal to 1; and a compound capable of being substituted with an amide group of component (A) (component (D)). Invention also discloses a method of producing synthetic polyisoprene and synthetic polyisoprene. EFFECT : invention provides effective synthesis of high-molecular polyisoprene in industrial conditions and enables to obtain a rubber mixture, which has excellent longevity in severe conditions. 5 cl, 2 tbl, 8 ex