Epoxy resin's excellent physical, mechanical and electrical insulation properties, bonding properties with various materials, as well as the flexibility of its use of technology is not available in other thermosetting plastics. Therefore, it can be made into coatings, composites, casting materials, adhesives, molding materials and injection molding materials, in all areas of the national economy has been widely used.
1、Paint
Epoxy resin in the application of coatings accounted for a large proportion, it can be made into a variety of characteristics, the use of different varieties. Its commonality:
(1) Excellent chemical resistance, especially alkali resistance;
(2) Strong adhesion of paint film, especially to metals;
(3) good heat resistance and electrical insulation;
(4) good color retention of the paint film.
However, the weather resistance of bisphenol A type epoxy resin coating is poor, the paint film is easy to chalk in the outdoor light loss and lack of fullness, should not be used as outdoor coatings and high decorative coatings. Therefore, epoxy resin paint is mainly used as anti-corrosion paint, metal primer, insulating paint, but heterocyclic and alicyclic epoxy resin paint can be used outdoors.
2、Adhesive
Epoxy resin in addition to non-polar plastics such as polyolefin bonding is not good, for a variety of metal materials such as aluminum, steel, iron, copper; non-metallic materials such as glass, wood, concrete, etc.; as well as thermosetting plastics such as phenolics, amines, unsaturated polyester, etc. have excellent adhesive properties, so there is a universal adhesive known as. Epoxy adhesive is an important variety of structural adhesive.
3、Electrical and electronic materials
Due to the many unique advantages of epoxy resin such as high insulating properties, high structural strength and good sealing performance, it has been widely used in high and low voltage electrical appliances, motors and electronic components insulation and encapsulation, and is developing rapidly. Mainly used for:
(1) Pouring of electrical appliances, motor insulation and encapsulation parts. Such as solenoids, contactor coils, mutual inductors, dry-type transformers and other high and low voltage electrical appliances, such as the manufacture of the whole fully sealed insulation package. In the electrical appliances industry has been rapid development. From atmospheric pressure casting, vacuum casting has developed to automatic pressure gel molding.
(2) Widely used in devices equipped with electronic components and lines of potting insulation. Has become an important insulation material indispensable to the electronics industry.
(3) Electronic grade epoxy molding compound for semiconductor component sealing. In recent years, the development is very fast. Because of its superior performance, there is a trend to replace the traditional metal, ceramic and glass packaging.
(4) Epoxy laminated plastics in the field of electronics, electrical appliances are widely used. Epoxy laminate development is particularly rapid, has become one of the basic materials of the electronics industry.
In addition, epoxy insulating coatings, insulating adhesives and electrical adhesives also have a large number of applications. 4, engineering plastics and composite materials
Epoxy engineering plastics mainly include epoxy molding plastics and epoxy laminating plastics for high-pressure molding, as well as epoxy foam. Epoxy engineering plastics can also be regarded as a broad epoxy composite materials. Epoxy composites are mainly epoxy FRP (general-purpose composites) and epoxy structural composites, such as pultruded epoxy profiles, winding molded hollow rotary products and high-performance composites. Epoxy composite material is an important structural and functional material in chemical industry and aviation, aerospace, military industry and other high-tech fields.
5、Civil construction materials
Mainly used as anticorrosive flooring, epoxy mortar and concrete products, advanced pavement and airport runway, quick repair materials, reinforcement of foundation foundation grouting materials, construction adhesives and coatings.