FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing a vulcanised rubber composition, a vulcanised rubber composition and a studless tire. Method of producing a vulcanised rubber composition includes: (a) a step for producing a master batch of butadiene rubber and silicon dioxide, (b) a step for producing a master batch of isoprene rubber and silicon dioxide, (c) a step for kneading the master batch obtained in (a) and the master batch obtained in (b), and (d) a step of vulcanising the kneaded product obtained in (c), wherein the formed vulcanised rubber composition includes a phase of the BC and a phase IR, which are immiscible with each other. Relative content α silicon dioxide in BK phase satisfies ratio of 0.3 ≤ α ≤ 0.7, and fraction β butadiene rubber meets ratio of 0.4 ≤ β ≤ 0.8.
EFFECT: invention improves operational characteristics on the icy coating and increases resistance to abrasive wear of the vulcanised rubber composition.
9 cl, 2 dwg, 2 tbl
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