STYRENE-BUTADIENE RUBBER WITH HIGH CONENT OF STYRENE AND VINYL UNITS AND ITS PRODUCTION METHODS Russian patent published in 2017 - IPC C08F236/10 C08F236/06 C08F297/04 C08L9/06 

FIELD: chemistry.

SUBSTANCE: invention relates to styrene-butadiene rubber based on solution with high content of styrene and vinyl units (SSBR) and to its production method. Method of polymerizing a polymer containing monomeric units obtained from a styrene monomer and a 1.3-butadiene monomer is disclosed. Polymerization of the monomeric units is carried out in the presence of an initiator, the first polar agent and the second polar agent. The first polar agent comprises the following structure (I): R^1'R^2'N-Q-NR^3'R^4'. The second polar agent comprises the following structure (II). The polymer has a glass transition temperature between -50°C and 20°C. The polymer obtained by the mentioned method is described as a composition comprising such polymer and an article comprising at least one component formed from such composition.

EFFECT: providing SSBR with high content of styrene and vinyl units with significantly narrowed range of the molecular mass distribution and increased activity of polymer chain at the end of polymerization.

18 cl, 4 dwg, 9 ex