COMPOSITION OF POLYMERISATION CATALYST, METHOD OF PRODUCING SYNTHETIC POLYISOPRENE AND SYNTHETIC POLYISOPRENE Russian patent published in 2016 - IPC C08F4/54 C08F4/605 C08F36/08 

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