Epoxy resin is a thermosetting resin with good chemical stability, corrosion resistance, good adhesion, and excellent flexibility. The substance formed by epoxy resin has extremely high hardness, which can reach the hardness of engineering plastics, and is commonly used to manufacture structural parts, moulds and complex machine parts, etc.; Epoxy resin also can be used to prepare a variety of coatings, for adhesives to make composite materials, injection moulding materials, etc.