Epoxy resin is excellent physical and mechanical and electrical insulating properties, and all kinds of adhesive properties, and its use of materials of flexibility is other thermosetting plastics can not have. Because it can make the coating, composite materials, casting materials, adhesive, die materials and injection molding materials, in the national economy has been widely used in various fields.
Application of epoxy resin in coatings accounted for larger proportion, it can make use of different varieties and distinctive. Its universality:
1, good chemical resistance, particularly alkaline resistance.
2, strong adhesion of paint film, especially for metal.
3, has good heat resistance and electrical insulation.
4, it has good colour retention.
But poor weatherability of bisphenol A type epoxy resin coating, paint film easy pulverization loss in the outdoor light and plump, high unfavorable for outdoor paint and decorative coatings. Therefore epoxy resin coatings are mainly used as primer, insulating paint, anti-corrosion paint, metal but heterocyclic and alicyclic epoxy resin coatings can be used in outdoor.
Second, the adhesive
Epoxy resin in addition to nonpolar plastic bad bonding such as polyolefin, for all kinds of metal materials such as aluminum, steel, iron, copper; Non-metallic materials such as glass, wood, concrete, etc.; And thermosetting plastics such as phenolic resin, amino, unsaturated polyester has excellent adhesive property, therefore is called contact adhesive. Epoxy adhesive is one of the important varieties of structural adhesive.
The main purpose of the epoxy resin adhesive are shown in table 1, table l l - l - 2 and table 3.
Table 1-1 the main purpose of the epoxy resin adhesive
Application field glued materials main characteristics of the main purposes
Civil engineering and construction of concrete, wood, metal, glass, thermosetting plastic, low viscosity, can be cured in wet surface (or water), low temperature curing concrete repair (old and new faces join), outer wall crack repair, panel bonding, the sewer pipe connection, the floor adhesive, building structure reinforcement.
Electronic appliances metal, ceramic, glass, FRP equipotential solid plastic electric insulation, moisture resistant, heat resistant to impact and heat resistance, low corrosive electronic components, integrated circuits, LCD screen, CD, speakers, magnetic head, iron core, battery boxes, parabolic antenna, printed circuit board
Aerospace metal, thermosetting plastic, FRP (fiber reinforced plastic) heat resistance, impact resistance, moisture resistant, fatigue resistance, radiation resistance the same metal, dissimilar metal bonding, honeycomb core and the bonding of metals, composites, panel bonding
Auto mechanical metal, thermosetting plastic, FRP wet resistance, rust, oil surface bonding, wear-resisting body bonding durability (features) of fatigue, thin steel plate reinforcement, FRP bonding, mechanical structure repair, installation
Sporting goods of metal, wood, glass, thermosetting plastic, the durability of FRP, resistance to impact of skis, golf clubs, tennis rackets
He metal, glass, ceramic, low toxicity, no yellowing relics repair, home use
3, electrical and electronic materials
Due to the insulation of the epoxy resin performance is high, the structure strength and sealing performance is good wait for many special advantages, has been in the insulation of the high and low voltage electrical appliances, electrical and electronic components and is widely used on packaging, developing very quickly. Mainly used for:
1, electrical appliances, electrical insulation encapsulation of pouring. Such as electromagnet, contactor coil, transformer, dry type transformer of high and low voltage electrical appliances such as fully sealed insulation wrapped pieces of manufacturing as a whole. In the electrical industry has made rapid development. From the atmospheric pressure casting, vacuum casting has been developed to automatic pressure gel forming. Chinese resin online
Table 1-2 main purpose of the epoxy adhesive on the civil engineering and construction
Adhesive object USES mainly composed of typical engineering category
Rock - based structure
Metal, stone or concrete
Metal - metal reinforcement of loose rock, foundation reinforcement, the embedded bolt, foot, etc., pillars, long pile head, bold, cantilever, the bridge reinforcement, road facilities equipped, diluent, epoxy modified amine
2. Widely used in electronic components and wiring devices, insulation potting. Has become an important and indispensable electronics industry insulation.
3, the electronic level of epoxy molding compound used in the semiconductor components encapsulation. In recent years especially fast. Because of its superior performance, to replace the traditional metal, ceramic and glass packaging trends.
4, epoxy laminate applied very widely in the field of electronics, electrical appliances. With epoxy resin copper clad is especially rapid development, has become one of the basic materials of the electronics industry.
Moreover, epoxy insulation of electric properties insulation coatings, adhesives and adhesive also has a large number of applications.
Four, engineering plastics and composite materials
Epoxy engineering plastics mainly includes epoxy molding compounds for high pressure molding and epoxy laminate, and epoxy foam plastics. Epoxy engineering plastics can also be regarded as a kind of generalized epoxy composite materials. Epoxy composite materials are epoxy glass fiber reinforced plastic composite material (gm) and epoxy composite structure, such as pultrusion profiles, epoxy winding hollow gyro-rotor products and high-performance composite materials. Epoxy composites is high-tech areas like chemical industry, aviation, aerospace and military industry one of the important structural materials and functional materials.
Fifth, civil engineering materials
Mainly used as anticorrosive floor, epoxy mortar and concrete products, advanced pavement, airport runway, rapid repair materials, and strengthening the foundation grouting materials, adhesives and coatings, etc.