Silica used in truck tires to improve the puncture resistance and tear resistance of the tread. Precipitation method is particularly suitable for its tread because it not only reduces rolling resistance, but also has low driving temperatures. For truck tires, low or low heat generation is extremely important.

The combination of precipitation method white carbon and carbon black can improve the performance of various tire treads. In the study of natural rubber tread rubber for heavy-duty tires filled with 60 parts of N231 carbon black, 30 parts of precipitation method white carbon black was used to directly replace the carbon black, and then a mercaptosilane coupling agent (the amount used was the amount of the white carbon black 1%, that is, the actual amount is 3 parts), as a result, the anti-cut-burst performance of the tread rubber is improved. On this basis, the amount of white carbon black by precipitation method was increased, and a mercaptosilane coupling agent was used at the same time. The test results show no adverse effects on heat generation and tread wear. In general, the precipitation performance of heavy duty tires is reduced when the precipitation method is used. Based on this, at present, the amount of white carbon black in its tread compounds is generally 15 parts.

In another completed test of natural rubber tread rubber for truck tires, partially replacing carbon black with white carbon black showed that highly dispersive white carbon black improves the wear resistance, tensile strength and tear strength of tread rubber It has obvious advantages. It is effective regardless of the amount used. When 20 parts of precipitation method white carbon black was used to replace the N234 carbon black in the tire styrene butadiene rubber tread rubber formula, the rolling resistance was reduced and the tear strength was improved.

In natural rubber truck tire tread rubber, when white carbon black modified with silane coupling agent is used instead of N220 carbon black, the rolling resistance is reduced by 30%, the traction on wet roads remains unchanged, and the tread wear index is only reduced. 5%. The use of TESPT and silica to reduce the rolling resistance of truck tire tread compounds was first reported by S. Wolff in 1986.

In the absence of a silane coupling agent, silica will destroy the sulfur / accelerator vulcanization mechanism, leading to prolonged scorch time, reduced vulcanization rate, and reduced crosslinking density.