| abstract |
A rubber composition comprises a polar group-containing diene polymernsynthesized through an emulsion polymerization as a rubber component, and anninorganic filler represented by a formula of mM·xSiO y ·zH 2 O wherein M is a metalnselected from the group consisting of aluminum, magnesium, titanium and calcium, annoxide or a hydroxide of such a metal or an hydrate thereof, m is an integer of 1 to 5, x isnan integer of 0 to 10, y is an integer of 2 to 5 and z is an integer of 0 to 10. |