Rubber Composition and Tire Using the Same

摘要

This invention provides a rubber composition having an excellent low loss factor and capable of imparting a wear resistance and a fracture resistance to a tire, which is formed by compounding carbon black having a toluene coloring transmittance of not less than 90% and satisfying a relationship between hydrogen emission ratio (% by mass) and cetyltrimethylammonium bromide adsorption specific surface area (CTAB) (m²/g) of the following equation: Hydrogen emission ratio>0.260-6.25x10^-4xCTAB into a modified natural rubber formed by adding a polar group-containing monomer to a natural rubber latex to graft-polymerize the polar group-containing monomer onto a natural rubber molecule in the natural rubber latex and then coagulating and drying.