In the rubber industry, in order to improve the performance of composite materials, it is usually necessary to fill a large amount of inorganic fillers for reinforcement. Carbon black and silica are commonly used reinforcing agents. Among them, silica has the advantages of small particle size and large specific surface area.

It has advantages over carbon black in terms of reducing tire rolling resistance and improving wet skid resistance. However, silica also has some shortcomings: First of all, silica and rubber have chemical properties.

The main advantages of solid sulfur-containing silane coupling agents are:
Solid products are more convenient to weigh and feed; when dispersed in carbon black particles, it can effectively prevent the silane coupling agent from hydrolyzing and self-condensing in the early stage of banburying, which is conducive to the uniform dispersion of the silane coupling agent;
It can be put into the internal mixer at one time without slow feeding.