METHOD OF PRODUCING VULCANISED RUBBER MIXTURE, VULCANISED RUBBER MIXTURE AND STUDLESS TIRE MADE USING SAID RUBBER MIXTURE Russian patent published in 2019 - IPC C08J3/22 C08L9/00 C08K3/36 C08L91/00 B60C1/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a vulcanised rubber mixture and to a studless tire. Vulcanised rubber mixture production method involves the following: (a) a step for producing a master batch comprising butadiene rubber and silicon dioxide, (b) a step for producing a master batch comprising isoprene rubber and silicon dioxide, (c) a step for plasticising the master batch obtained in step (a) and the master batch obtained in step (b) and (d) a step of curing the plasticized product obtained in step (c), where the obtained vulcanised rubber mixture contains a phase of the BR and a phase of the IR which are immiscible with each other. Vulcanised rubber mixture contains not less than 0.5 pts.wt terpene-based resins per 100 pts.wt rubber components. Relative content α silicon dioxide in BR phase satisfies ratio of 0.3 ≤ α ≤ 0.7 (ratio 1), and fraction β butadiene rubber meets ratio of 0.4 ≤ β ≤ 0.8 (ratio 2).

EFFECT: invention allows improving the ice characteristics, wet road surface characteristics and abrasion resistance of the vulcanised rubber mixture and tire tread in a well-balanced manner.

9 cl, 2 dwg, 3 tbl