MQ silicone resin is a kind of organic silicone resin with a relatively unique structure. It is a three-dimensional spherical silicone resin generated by the co-hydrolysis and polycondensation reaction of an organic silicone compound containing a tetrafunctional siloxane chain (SiO4/2, Q) and an organic silicone compound containing a monofunctional siloxane chain (R3SiO1/2, M). It is generally believed that MQ silicone resin is a double-layered tight sphere, the core of which is a cage-like silica with a high density of silicon-oxygen bonds and a polymerization degree of 15-50, and the shell is a low-density R3SiO1/2 layer. MQ silicone resin has many different types due to the different organic groups R on the shell: when all R are methyl, it is called methyl MQ silicone resin or simply MQ silicone resin; when part of R is vinyl, it is called methyl vinyl MQ silicone resin; when part of R is H, it is called methyl hydrogenated MQ silicone resin; there are also methyl phenyl MQ silicone resin, vinyl MQ silicone resin, phenyl MQ silicone resin, fluorine-containing MQ silicone resin, MDQ, MTQ silicone resin, etc.