PROCESS OF OBTAINING POLYMERISATE INVOLVING CONJUGATED DIENES AND VINYL AROMATIC COMPOUNDS, POLYMERISATES OBTAINED THEREOF AND THEIR APPLICATION Russian patent published in 2008 - IPC C08F236/10 C08F4/48 C08F2/26 

FIELD: chemistry.

SUBSTANCE: invention concerns process of obtaining polymerisate by anion polymerisation involving conjugated dienes and vinyl aromatic compounds. It describes obtaining of statistic polymerisates by anion polymerisation involving conjugated dienes and vinyl aromatic compounds, in inert medium, in the presence of at least one lithium-organic compound; at least one dialkyl ester represented by the formula: R¹-O-CH₂-CH(R³)-O-R² (where R¹ and R² independently denote alkyl residues from methyl, ethyl, n- and isopropyl group, as well n-, iso-, di- and tributyl group, with different number of carbon atoms, while total amount of carbon atoms in both alkyl residues R¹ and R² comprises 5 to 7, and R³ stands for hydrogen, methyl or ethyl group); and at least one organic alkali compound at the ratio of more that 0.5 mol for one mol of lithium in organic lithium compound. As an organic alkali compound alkali metal alkoholate of formula M-OR is taken, where R is an alkyl group with 1-10 carbon atoms, and M is sodium.

EFFECT: production of vinyl order rubber with high styrol content with sufficient monomer randomisation.

13 cl, 1 tbl, 10 ex