IMPROVED VINYL CONTENT MODIFIER COMPOSITION AND METHODS OF USING SAID COMPOSITION Russian patent published in 2015 - IPC C08F2/38 C08F36/04 C08F236/04 

FIELD: chemistry.

SUBSTANCE: present invention relates to an oxolanyl compound-containing composition and use thereof. Described is a vinyl content modifier composition which contains at least one oxolanyl compound selected from a group consisting of: where R₁ and R₂ are independently hydrogen or an alkyl group and the total number of carbon atoms in -CR₁R₂- ranges from 1 to 9 inclusively; R₃, R₄ and R₅ are independently -H or -C_nH_2n+1, where n=1-6, wherein said at least one oxolanyl contains at least 52 wt % of the meso-isomer of the at least one oxolanyl compound, wherein a residue is formed from D- and L-isomers. Described also is a polymerisation method, which includes a step of polymerising at least one conjugated diene monomer in the presence of at least one organometallic anionic initiator and said composition comprising to obtain a polydiene polymer characterised by vinyl content in the range of 10% to less than 100%. Described also is a polydiene (co)polymer obtained using said method, a tyre containing said polydiene (co)polymer. Described is polymerisation method, which includes polymerising 1,3-butadiene in the presence of an oxolanyl compound 2,2-di(2-tetrahydrofuryl)propane, which contains at least 52 wt % of a meso-isomer, wherein the residue is formed from D- and L-isomers, wherein said method leads to the production of a polydiene polymer, characterised by vinyl content in the range of 10% to 100%, using an organolithium anionic initiator, and carrying out the method such that the peak polymerisation temperature is in the range of 85°C to 120°C. Also described is a tyre containing a polydiene (co)polymer.

EFFECT: high activity of the composition which contains an oxolanyl compound when used as a vinyl content modifier in polymerisation methods.

24 cl, 6 dwg, 5 tbl, 6 ex