MQ silicone resin is a kind of silicone resin with unique structure. , M) silicone grease with three-dimensional spherical structure generated by co-hydrolysis-polycondensation reaction of organosilicon compounds. Its molar mass is generally 1000-8000 g/mol, with a state from viscous fluid to solid powder, hard and brittle, and a wide range of glass transition temperature (Tg).

It is generally believed that MQ silicone resin is a compact spherical body with a double-layer structure, in which the core is a cage-like SiO2 with Si-O chain connection, high density and a degree of polymerization of 15-50, and the spherical shell is a low-density R3SiO1/2 layer .

MQ silicone resins have many different types due to the difference in the organic group R on the spherical shell:
When R is all methyl, it is called methyl MQ silicone resin or MQ silicone resin for short; when part of R is H, it is called methyl hydrogen-containing MQ silicone resin; there are also methyl phenyl MQ silicone resin, vinyl MQ resin Silicone, Phenyl MQ Silicone, Fluorine MQ Silicone, MDQ, MTQ Silicone, etc. The performance of MQ silicone resin and its application range mainly depend on its synthesis process conditions and the type and number of organic groups in the molecule, that is, the number ratio of M chain units and Q chain units; the organic group R is mainly increased with other groups. The compatibility of the components plays a role in increasing the viscosity, and the SiO4/2 chain link mainly improves the strength of the composite material and plays a reinforcing role.

Silicone adhesives are divided into adhesives based on silicone resin and adhesives based on room temperature vulcanized silicone rubber. The former is mainly used for bonding metals and heat-resistant non-metallic materials. Use within the temperature range of 120 °C; the latter is mainly used for bonding heat-resistant rubber, bonding rubber and metal, and bonding other non-metallic materials.

Silicone resin is a cross-linked semi-inorganic polymer with silicon-oxygen-silicon as the main chain and organic groups connected to the silicon atom. It is made of polyfunctional silicone by hydrolysis and polycondensation. Under the action of a catalyst, it can be further converted into an insoluble and infusible thermosetting resin with a three-dimensional structure. Silicone resins can be divided into methyl silicone resins, phenyl silicone resins, methyl phenyl silicone resins and the like according to the different connecting groups on the silicon atoms.