Aluminiumhydroxid, Zusammensetzung einer Reifenlauffläche und Luftreifen enthaltend Aluminiumhydroxid

摘要

Aluminium hydroxide having specific characteristics, and a tyre tread rubber composition and a pneumatic tyre employing the aluminium hydroxide, which allow grip performance and abrasion resistance to increase and rolling resistance to decrease and are superior in processibility, are provided. The aluminium hydroxide has a loosed bulk density of not more than 0.60g/cm<3>, a DOP oil absorption of at least 70cm<3>/100g and less than 250cm<3>/100g, and a BET specific surface area of at least 30m<2>/g and not more than 350m<2>/g. 5-150 parts by weight of the aluminium hydroxide is blended with 100 parts by weight of a rubber component to obtain the tyre tread rubber composition. The rubber component preferably includes at least 60 parts by weight of styrene-butadiene rubber having a styrene content of 20-60% by weight.