METHOD OF OBTAINING COPOLYMERS OF CONJUGATED DIENS IN PRESENCE OF CATALYTIC SYSTEM INCLUDING BISIMIN COMPLEX OF COBALT Russian patent published in 2017 - IPC C08F36/06 C08F136/06 C08F4/70 C08F4/80 C08F4/609 

FIELD: chemistry.

SUBSTANCE: method for the preparation of conjugated diene polymers involves the polymerization of at least one conjugated diene in the presence of a catalytic system comprising at least one bis-imine cobalt complex having the general formula (I), where: n is 0 or 1, Y is an unsubstituted divalent aromatic group_, R₁ and R₂ are the same or different and represent a hydrogen atom or a methyl group, R₃ and R₄ are the same or different and represent a hydrogen atom, or they are selected from unbranched or branched C₁-C₃ Alkyl groups, cycloalkyl groups; Optionally substituted with unbranched or branched C₁-C₄ Alkyl groups of aryl groups, or R₂ and R₄ can optionally be joined together to form, together with the other atoms to which they are attached, an unsubstituted pyridine ring, or R₁ and R₃ may optionally be connected to each other to form, together with the other atoms to which they are attached, an unsubstituted pyridine ring, X₁ and X₂ represent a halogen atom such as chlorine, bromine, iodine.

EFFECT: method provides the preparation of polydienes with a high content of 1,4-cis-units.

16 cl, 1 tbl, 12 dwg