Highly Saturated Diene Rubber Composition for Tire Tread Grip

The patent changes the chemical composition parameters by using highly saturated diene elastomer (≥85% saturation) combined with specific resin ratios (aromatic resin 10-40 parts, aliphatic resin 10-40 parts per 100 parts elastomer). This parameter optimization achieves both low rolling resistance (tan δ at 23°C ≤0.085) and good wet grip (tan δ integral from -40°C to 0°C ≥0.45), resolving the contradiction between energy loss and reliability.

The patent creates a composite rubber composition by combining highly saturated diene elastomer with a specific blend of aromatic and aliphatic resins. The aromatic resin provides structural integrity and low-temperature flexibility, while the aliphatic resin enhances adhesion and wet grip. This composite approach maintains low rolling resistance (≤0.085 tan δ at 23°C) while achieving good wet grip (≥0.45 tan δ integral), thus resolving the contradiction between energy efficiency and reliability.

The patent optimizes the resin content parameters within specific ranges (aromatic resin 10-40 parts, aliphatic resin 10-40 parts per 100 parts elastomer) to achieve the desired balance between rolling resistance and compound simplicity. By controlling these parameters, the formulation achieves low rolling resistance (tan δ at 23°C ≤0.085) without excessive complexity, and maintains good processability and vulcanization characteristics.