Precipitation method of white carbon used in carbon black filled passenger tire tread rubber can greatly improve the performance of various tires.

Combining precipitation carbon dioxide with high dispersibility with special solution polymers and silane coupling agents, combined with the best mixing process, can overcome the reduction in hysteresis loss of the tread rubber, and the wet road gripping performance will follow. Reduced defects. The tread rubber completely using white carbon as a filler can reduce the tire rolling resistance by 20%, which means that the tread lag loss is reduced by about 50%, and the fuel consumption is reduced by at least 3%.

Using 36 parts of precipitation method white carbon black and blending with 3% mercaptosilane coupling agent equivalent to the amount of precipitation method white carbon black to form a filling system with a total amount of filler of 72 parts. After testing, passenger tire styrene-butadiene rubber / The rolling resistance of the polybutadiene rubber tread rubber decreased by about 25%, while the traction performance on dry and wet roads did not decrease significantly.

Filled with 20 parts of precipitation method white carbon black and 40 parts of N339 carbon black tread rubber, if the use of TESPT coupling agent, you can get a balanced vulcanization effect, and the tire rolling resistance is reduced by 9%, the change in tread wear performance is minimal.

The carbon black was partially replaced by precipitation method (40% to 60% of the original carbon black), and a coupling agent (13.6% of the amount of white carbon black of the precipitation method) was used. The experimental results showed that Rubber / polybutadiene rubber-based passenger tire treads have a 5% increase in traction on ice and a 18% decrease in rolling resistance. The wet road traction is equivalent to that of a comparative tire. There is almost no change in tread wear performance. In the research of natural rubber / styrene-butadiene rubber / polydibutylene rubber tread rubber, it was found that increasing the amount of carbon black used in the precipitation method and using organosilanes while reducing the amount of carbon black can greatly reduce the tread rubber at 60 ° C. The loss tangent of. This value has been considered a measure of expected rolling resistance.

In the study of carbon black filled natural rubber compound with precipitation silica, using 3,3'-dithiodipropionate as a silane coupling agent, 300% set elongation stress, resilience and hardness values It has increased, and the loss tangent of the tread rubber decreases at 60 ° C. Diaminodipropionate (2 parts) was used as the coupling agent, and cis 1,4-polyisoprene synthetic rubber was used to replace the natural rubber in the original formula. As a result, it was found that the elongation at break increased and the loss was increased. The angle tangent decreases.

Overfilled precipitation method for styrene-isoprene-butadiene (SIBR) rubber / butadiene tread rubber and SIBR / cis butadiene / isoprene-butadiene rubber In the study of black, the laboratory test results show that the tread angle rubber filled with precipitation method silica only has a lower loss tangent at 50 ° C than the tread rubber filled with carbon black / precipitation method silica. The tangent value of the loss angle at -20 ° C increases, which means that the rolling resistance is reduced, and the slip resistance of the wet road is improved.

As mentioned above, the performance of the tire is directly related to the amount of precipitation method silica in the tread rubber, that is, its performance is increased by the increase of the amount of the latter. In particular, the effect obtained when all the carbon blacks are used is the best. At present, the amount of precipitated silica in passenger tire treads is 65 parts.