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TREAD RUBBER COMPOSITION OF TIRE FOR TRUCK AND BUS WITH EXCELLENT TEAR RESISTANCE AND ABRASION RESISTANCE, WHICH COMPRISES POLYBUTADIENE RUBBER ADDUCTED WITH MALEIC ANHYDRIDE
TREAD RUBBER COMPOSITION OF TIRE FOR TRUCK AND BUS WITH EXCELLENT TEAR RESISTANCE AND ABRASION RESISTANCE, WHICH COMPRISES POLYBUTADIENE RUBBER ADDUCTED WITH MALEIC ANHYDRIDE
PURPOSE: A tread rubber composition for the tire for a truck and bus is provided, to improve heat resistance, abrasion resistance and tear resistance without deterioration of other properties. CONSTITUTION: The tread rubber composition comprises 100 parts by weight of a rubber; 5-20 parts by weight of silica; and 1.0-5 parts by weight of a polybutadiene rubber adducted with maleic anhydride. Preferably the polybutadiene rubber adducted with maleic anhydride is obtained by adding a polybutadiene resin to maleic anhydride, and the polybutadiene resin has a number average molecular weight of 2,500-8,500 and contains 25-50 % of 1,2-vinyl part.
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