The rubber composition for tire tread and studless tire of studless tire and the manufacturing method of the rubber composition

摘要

PROBLEM TO BE SOLVED: To provide a rubber composition for studless tire tread having suppressed performance reduction with time while enhancing on-ice breaking performance, a studless tire using the same and a manufacturing method of the rubber composition.SOLUTION: There is provided a rubber composition for studless tire tread containing a diene rubber, a chitosan granular material and a vegetable granular material with 0.5 to 30 pts.mass of the chitosan granular material based on 100 pts.mass of the diene rubber.SELECTED DRAWING: None