Precipitated silica is used in carbon black filled passenger tire tread rubber to greatly improve the performance of the tire.

The combination of precipitated silica with high dispersibility and special solution polymer and silane coupling agent, together with the best mixing process, can overcome the hysteresis loss of the tread rubber, and the wet road grip performance Reduced defects. The tread rubber, which is completely filled with silica as a filler, can reduce the rolling resistance of the tire by 20%, which means that the tread hysteresis loss is reduced by about 50% and the fuel consumption is reduced by at least 3%.

36 parts of precipitated silica was used, and a hydrazine-based silane coupling agent corresponding to 3% of the white carbon black of the precipitation method was added to form a filling system with a total amount of filler of 72 parts. After testing, the tire was styrene-butadiene rubber/ The rolling resistance of the polybutadiene rubber tread rubber decreased by about 25%, and the traction performance of the dry and wet pavement did not decrease significantly.

Filling 20 parts of precipitated silica and 40 parts of N339 carbon black tread rubber, if TESPT coupling agent is used, the equilibrium vulcanization effect can be obtained, and the rolling resistance of the tire is reduced by 9%, and the tread wear performance is minimal.

Partially replacing the carbon black with the precipitation method (40% to 60% of the amount of the original carbon black), and using the coupling agent (accounting for 13.6% of the amount of the white carbon black in the precipitation method), the test results show that the oil is naturally The rubber/polybutadiene-based passenger tire tread has an increase in ice traction of 5%, a rolling resistance of 18%, and a wet road traction equal to that of a comparative tire. There is almost no change in tread wear performance. In the study of natural rubber/styrene-butadiene rubber/polybutylene rubber tread rubber, it was found that increasing the amount of precipitated silica, and using organosilane, while reducing the amount of carbon black, can greatly reduce the tread rubber at 60 ° C. The loss tangent value. This value has been considered as a measure of the expected rolling resistance.

300% modulus, resilience and hardness values when using 3,3'-dithiodipropionate as a silane coupling agent in a carbon black-filled natural rubber compound mixed with precipitated silica There is an increase in the loss tangent of the tread rubber at 60 °C. Using diaminodipropionate (2 parts) as a coupling agent and replacing the natural rubber in the original formulation with cis 1,4-polyisoprene synthetic rubber, it was found that the elongation at break increased and the loss occurred. The tangent value decreases.


Overfilled precipitated white carbon in styrene-isoprene-butadiene (SIBR) rubber/butadiene rubber tread rubber and SIBR/cis-butadiene/isoprene-butadiene rubber tread rubber In the black study, the laboratory test results show that the tread rubber filled only with the precipitated silica is less than the tread rubber filled with carbon black/precipitated silica, and the loss tangent at 50 °C is reduced. The loss tangent at -20 °C increases, which means that the rolling resistance is reduced and the wet road surface has improved slip resistance.


In the longitudinal direction, the performance of the tire is directly related to the amount of precipitated silica in the tread rubber, that is, the performance of the subsequent increase in the amount of the coating. Especially when it is used in its entirety, the effect obtained by carbon black is the best. At present, the amount of precipitated silica in the tire tread of a passenger tire is 65 parts.