METHOD FOR PRODUCING BUTADIENE POLYMERS OR BUTADIENE COPOLYMERS WITH STYRENE WITH LOW CONTENT OF 1,2-UNITS IN BUTADIENE PART Russian patent published in 2018 - IPC C08F36/06 C08F136/06 C08F236/10 C08F2/38 

FIELD: chemistry.

SUBSTANCE: invention relates to the production of butadiene and butadiene-styrene rubbers with a low content of 1,2-units in the butadiene part and a narrow molecular weight distribution. Process for the preparation of such polymers is carried out in a hydrocarbon solvent medium using an initiating system containing an aluminum and an organolithium compound and a polar agent, as the organolithium compound use R₁Li, where R₁ an alkyl group, as the polar agent, an aminoalkyl ester of the formula:

where R₂-R₈ – alkyl group or hydrogen, as an organoaluminum compound use an organoaluminum compound AlR₉R₁₀R₁₁, where R₉-R₁₁ – alkyl group or hydrogen, wherein the molar ratio of aminoalkyl ether : organolithium compound is [0.01÷1.0]:1.0, and the molar ratio of organoaluminum compound: organolithium compound is [0.01÷1.0]:1.0.

EFFECT: achieved high polymerization activity of the initiating system based on the organolithium compound, aminoalkyl ether and organoaluminum compound and the preparation of polymers of butadiene and copolymers of butadiene with styrene containing 1,2-units in the butadiene part of 5–15% and a narrow molecular weight distribution M_w/M_n=from 1 1/5 to 1 ½.

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