The invention to be, more particularly, to improvements in the desired physical properties in both the organic filler is carbon can act as a coupling agent in Black's inorganic and organic fillers according to the diene-based rubber composition reinforced with organic fillers, especially carbon black by introducing the zirconate coupling agent of the carbonate system it can be achieved, in particular, to the physical strength of the rubber composition as well as the improvement of the (tensile strength, tear strength, elongation, etc.) on the adhesive strength is also improved rubber composition.
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