TIRE FOR WHEELS OF VEHICLES Russian patent published in 2020 - IPC B60C1/00 

FIELD: chemistry.

SUBSTANCE: invention relates to winter tires. Tire (100) includes a tire component comprising a cross-linked elastomer material obtained by cross-linking a crosslinkable elastomeric composition, where the elastomeric composition contains a polymer mixture containing (a) from 50 to 95 wt. % of first elastomeric polymer and (b) from 5 to 50 wt. % of second elastomeric polymer based on the total weight of the polymer mixture. Second elastomeric polymer (b) can be obtained (i) by anionic polymerisation of at least one conjugated diene monomer and one or more α-olefin monomer(s) in the presence of a polymerisation initiator in an organic solvent and (ii) bonding polymer chains obtained in (i) through a binding agent. Second elastomeric polymer (b) has a weight average molecular weight (M_w) in range of 5,000–40,000 g/mol and a degree of binding, at least 50 % by weight.

EFFECT: improved balance of characteristics of tires on wet and snowy ground, especially winter tires, and simultaneously achieving same or better characteristics from the point of view of braking on dry surfaces.

20 cl, 1 dwg, 5 tbl