FIELD: chemistry.
SUBSTANCE: rubber mixture for lateral rubber contains 35-55 pts.wt filler which contains at least soot with dibutylphthalate absorption coefficient not lower than 105 mg/100 g and nitrogen adsorption specific surface area of not less than 40 m2/g per 100 pts.wt rubber component consisting of at least two or more of natural rubber, synthetic polyisoprene rubber and another diene-based synthetic rubber. The rubber mixture additionally contains a curing agent and the amount of said soot in the mixture is between 15 and 55 pts.wt and tan δ at 25°C and total amount of filler in the mixture satisfies the following relationship (I): tan δ/total amount of filler in the mixture ≤ 0.0025 …(I).
EFFECT: disclosed rubber mixture has good processability and low hysteresis loss without deterioration of longevity of the side rubber and the pneumatic tyre has low rolling resistance.
4 cl, 3 tbl, 2 ex
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