TREAD RUBBER COMPOSITION FOR RECYCLING TRUCK AND BUS TIRES AND A TIRE REPRODUCED BY USING THEREOF CAPABLE OF IMPROVING DURABILITY, ABRASION RESISTANCE, AND CUT-CHIPPING

摘要

PURPOSE: A tread rubber composition for recycling truck and bus tires and a tire reproduced by using thereof are provided to satisfy abrasion resistance and durability at the same time and improve cut-chipping property compare to existing rubber compositions.;CONSTITUTION: A tread rubber composition for recycling truck and bus tires comprises 100.0 parts by weight of raw rubber which includes 70-90 parts by weight of styrene butadiene rubber and 10-30 parts by weight of butadiene rubber, 50-58 parts by weight of carbon black which has nitrogen adsorption specific area of 118-122 m^2/g, DBP oil absorption of 124-128cc/100g, and tint value of 119-122. The butadiene rubber has more than 96 weight% of cis-1,4-butadiene and glass transition temperature(Tg) is (-104)-(-107) deg. Celsius. The styrene butadiene rubber has 22-25 weight% of styrene, vinyl content of 15-18 weight%, and number average molecular weight(Mn) of 55,000-59,000g/mol.;COPYRIGHT KIPO 2012