RUBBER COMPOSITION, VULCANIZED RUBBER AND TIRE Russian patent published in 2022 - IPC C08L7/00 C08L9/00 C08L9/06 C08K3/04 C08K3/36 B60C1/00 

FIELD: tire production.

SUBSTANCE: invention relates to rubber compositions for the production of tires. A rubber composition is proposed, including a rubber component containing natural rubber, polybutadiene rubber, and styrene-butadiene copolymer rubber, and from 50 to 90 parts by weight of a filler containing silicon dioxide per 100 parts by weight of the rubber component, in which weight n of natural rubber in the rubber component is 40% by weight or more, weight n, weight b of polybutadiene rubber, and weight s of styrene-butadiene copolymer rubber satisfy the ratio: s≤b≤n, provided that, when n=b, s<b, and 50% by weight or more of silicon dioxide is contained in a phase including polybutadiene rubber and styrene-butadiene copolymer rubber, wherein either one or both of polybutadiene rubber and styrene-butadiene copolymer rubber are modified with a modifying functional group, which contains at least one atom selected from a group consisting of a nitrogen atom, a silicon atom, an oxygen atom, and a tin atom. Vulcanized rubber obtained by vulcanization of the proposed rubber composition, and a tire containing it are also proposed.

EFFECT: proposed rubber composition allows for obtaining a tire, in which a small elasticity module at low temperatures is combined with high hysteresis losses at low temperatures, and which has excellent efficiency of braking on ice.

13 cl, 2 dwg, 2 tbl, 5 ex