RUBBER COMPOSITION AND TIRE MANUFACTURED USING SAME

摘要

Provided are: a rubber composition which is improved in the dispersibility of silica therein to decrease the viscosity of the unvulcanized rubber and therefore improve the processability of the unvulcanized rubber and which does not cause rubber burning can prevent the occurrence of shrinkage without reducing a vulcanization rate and has good heat resistance; and a tire produced using the rubber composition. As the above mentioned rubber composition a rubber composition can be mentioned which is produced by adding silica and a glycerin fatty acid ester composition to at least one rubber component selected from natural rubbers and diene type synthetic rubbers wherein the amount of the glycerin fatty acid ester composition to be added is 0.5 to 15 parts by mass relative to 100 parts by mass of the rubber component in which the fatty acid has 8 to 28 carbon atoms the composition comprises a glycerin fatty acid monoester and a glycerin fatty acid diester and the content of the glycerin fatty acid monoester in the composition is 85 mass% or less.