Hydrogenated Styrene-Butadiene Rubber Tire Composition

The patent applies parameter changes by hydrogenating the conjugated diene rubber to reduce the degree of unsaturation from typical values (e.g., 30-70% hydrogenation) to a high degree of hydrogenation (80-95% or more). This fundamental change in the chemical structure parameter transforms the rubber's properties, enabling simultaneous achievement of low rolling resistance (good fuel economy) and high abrasion resistance, thereby resolving the technical contradiction between fuel economy and abrasion resistance.

The patent employs composite materials by combining highly hydrogenated conjugated diene rubber with specific filler systems (silica and/or carbon black) and coupling agents. This composite approach creates a synergistic effect where the hydrogenated rubber matrix provides both low rolling resistance and enhanced mechanical strength, while the filler-coupling agent system reinforces the structure. The combination resolves the contradiction between fuel economy and tensile strength by creating a multi-component system where each component contributes to both objectives.

The patent applies parameter changes by precisely controlling the hydrogenation degree parameter to fall within the optimal range of 80-95% or more, and by adjusting the filler content parameters (silica: 1-200 parts by mass per 100 parts rubber, carbon black: 3-60 parts by mass per 100 parts rubber). These parameter optimizations ensure that the rubber compound achieves high abrasion resistance through extensive hydrogenation while maintaining low rolling resistance through appropriate filler loading, thereby resolving the contradiction between abrasion resistance and fuel economy.