| 摘要 |
PURPOSE: A tire tread rubber composition is provided to improve the physical property of the tire tread rubber of a bus and truck for driving on both paved and rough roads, thereby improving resistivity against a cutting and chipping phenomenon. CONSTITUTION: A tire tread rubber composition contains 2-10 parts by weight of the mixture between an aliphatic resin and an aromatic resin and 40-60 parts by weight of carbon black based on 100.0 parts by weight of natural rubber and the raw rubber composed of solution-polymerized styrene butadiene rubber. The styrene content of the solution-polymerized styrene butadiene rubber is 30-50 weight%. The vinyl content is 15-25 weight%, and the glass transition temperature is (-60)-(-25)°C. The iodine adsorption of the carbon black is 100-130mg/g, and the dibutyl phthalate adsorption of the carbon black is 80-120ml/100g. |
