MQ silicone resin is usually prepared by sol-gel process. The main raw materials of M chain are six methyl two siloxane (MM) or three methyl chlorosilane, and Q chain is mainly composed of sodium silicate or sodium tetraethyl orthosilicate (TEOS). Due to the different raw materials of Q-LINK, it is mainly divided into TEOS method and water glass method. The product made from TEOS has good performance, but its cost is high, which limits its application scope; the raw material of water glass process is cheap and easy to obtain, and the product performance is also good, which has a great market value.
Silicone rubber has a variety of excellent properties, but its mechanical properties such as compressive strength and tear strength are poor, which can not meet the requirements of the process, so it is necessary to add fillers to modify and strengthen it. When MQ silicone is used as reinforcing filler, it can not only increase the strength of rubber matrix, but also increase the viscosity of the system too fast, which is conducive to the subsequent operation, and the vulcanizate prepared has good transparency.