| abstract |
A rubber composition which comprises: (A) a rubber ingredient comprising 30-100 mass% diene rubber having at least one functional group selected from the group consisting of amino, alkoxysilyl, epoxy, hydroxy, and carboxy in an amount of 0.01-5.0 mmol per 100 g; (B) silica, which is contained in an amount of 5-130 parts by mass per 100 parts by mass of the rubber ingredient; and (C) an aliphatic ingredient having at least one functional group selected from the group consisting of carboxy, hydroxy, amino, and epoxy, the aliphatic ingredient being contained in an amount of 3-15 parts by mass per 100 parts by mass of the silica. This rubber composition and an unvulcanized tire formed therefrom have excellent unsusceptibility to scorching, and are reduced in rolling resistance and excellent in wet skid resistance after vulcanization. |