LANTHANIDE BIS-IMATIN COMPLEX, CATALYTIC SYSTEM CONTAINING THE INDICATED BIS-IMINE COMPLEX, AND METHOD FOR (CO)POLYMERIZATION OF CONJUGATED DIENES Russian patent published in 2017 - IPC C07F5/00 C08F4/52 C08F4/54 C08F136/06 C08F136/08 C08F136/00 C08F36/00 

FIELD: chemistry.

SUBSTANCE: complex has general formula (I): , in which Ln is metal of lanthanide series, selected from neodymium (Nd), lanthanum (La), praseodymium (Pr); N is 0; R₁ and R₂ are identical or different from each other and represent hydrogen atom; or they are selected from linear or branched C_1-C₂₀ alkyl groups; R₃ and R₄ are the same and selected from linear or branched C_1-C₂₀ alkyl groups, optionally substituted cycloalkyl groups, optionally substituted aryl groups; or R₁ and R₃ may be optionally linked to each other for formation with other atoms to which they are linked, saturated, unsaturated or aromatic ring containing from 3 to 6 carbon atoms, optionally substituted with linear or branched C_1-C₂₀ alkyl groups, such as oxygen, sulfur, nitrogen, silicon, phosphorus, selenium; X₁, X₂ and X₃ are the same, represent a halogen atom, such as chlorine, bromine, iodine. Catalyst system for (co)polymerization of conjugated dienes, method for (co)polymerization of conjugated dienes and method for polymerization of 1,3-butadiene or isoprene are proposed as well. This bis-imine complex of lanthanides can be used in catalytic systems that allow to obtain (co)polymers of conjugated dienes with a high content of 1,4-cis units.

EFFECT: increased quality of output.

7 cl, 9 dwg, 3 tbl, 97 ex