2. Modification of white carbon black coupling agent

The principle of coupling agent modification is to use part of the functional groups on the coupling agent to chemically react with the hydroxyl groups on the surface of the silica to change the structure and distribution of the groups on the surface of the silica to improve the compatibility with the matrix. And its own dispersion. Coupling agent modification has the advantages of good modification effect and high reaction controllability, and is one of the most widely used modification methods at present.

Currently, the more widely used coupling agents include silane coupling agents, siloxane coupling agents and silazane coupling agents. In practical applications, the main process of coupling agent modification is divided into four steps: mixing reaction, cooling separation, repeated washing and precipitation.