Definition:
Silicone resin (also known as polysiloxane) is a general term for a class of polymers whose skeletons are composed of alternating silicon atoms and oxygen atoms, and different organic groups are linked to silicon atoms. The structure of silicone resin contains both "organic groups" and "inorganic structures". This special composition and molecular structure make it a combination of organic properties and inorganic functions.


Application:
Silicone resin is mainly used as insulating varnish (including varnish, enamel, color paint, impregnation paint, etc.) to impregnate H-class motors and transformer coils, and to impregnate glass cloth, glass cloth silk and asbestos cloth to make motor casings, electrical insulation windings, etc. Large-area mica sheet insulation materials can be made by bonding mica with silicone insulating varnish, which is used as the main insulation of high-voltage motors. In addition, silicone resin can also be used as heat-resistant and weather-resistant anti-corrosion coatings, metal protective coatings, waterproof and moisture-proof coatings for construction projects, release agents, adhesives, and secondary processing into silicone plastics, which are used in the electronics, electrical and defense industries as semiconductor packaging materials and insulating materials for electronic and electrical components.


Curing method:
There are roughly three ways to cure and crosslink silicone resin: one is to use the hydroxyl groups on the silicon atoms to shrink, polymerize and crosslink to form a network structure, which is the main way to cure silicone resin; the second is to use the vinyl groups connected to the silicon atoms and use organic peroxides as catalysts, similar to the vulcanization of silicone rubber; the third is to use the vinyl groups connected to the silicon atoms and the silicon-hydrogen bonds for addition reactions, such as mixing solvent-free silicone resin with a foaming agent to produce foam silicone resin. Therefore, silicone resin can be roughly divided into several categories according to its main use and crosslinking method, such as silicone insulating paint, silicone coating, silicone plastic and silicone adhesive.


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