Epoxy resin application technology development trends
Epoxy resin technology development trends in the development of high-performance, high value-added emphasis on environmental protection and production safety. Special structure of epoxy resins and additives product toward the sophisticated, functional, and curing in the special circumstances of development. The cured product with high toughness, high strength, resistance to radiation, the direction of the high and low temperature. This special resin, hardener, thinner varieties will have a greater development, the formation of the pattern of the more varieties of small batch production.
With the recent development of polymer physics, the development of varieties has been focused on the chemical or non-chemical synthesis method, was prepared by blending the alloy means epoxy – thermoplastics, filling a variety of organic and inorganic compounds and epoxy resin inorganic nanocomposites.
1 Paints and Coatings
The development trend of the epoxy resin to reduce pollution and improve the quality and safety, and develop functional. Focus on developing tank with paint, anti-corrosion coatings, functional coatings and environmentally friendly paint application. Especially the varieties of which the water-based epoxy system development and quality, will be in the automobile industry (eg, electrophoretic coating), household appliances industry, food industry (such as cans of paint), the chemical industry (such as anti-corrosion epoxy coatings), the construction industry (such as ping coatings, construction adhesives, epoxy mortar and concrete) and other applications for a breakthrough.
2 Electronic Materials
With the development of electronic equipment to small, lightweight, high performance and high functional electronic device corresponding to the high level of integration of thin multi-layered direction, thus requiring the epoxy seal-like material and CCL heat resistance, dielectric properties and toughness, and lower water absorption and internal stress. The current development focus is high-purity, high heat resistance, low water absorption and high toughness of epoxy resin and curing agent. For example, in the introduction of the naphthalene epoxy resin and curing agent, dicyclopentadiene, biphenyl, diphenyl ether, fluorene skeleton can greatly improve the heat resistance and electrical properties of the epoxy cured, lower water absorption. In addition, the bromine flame retardant epoxy systems research and development also caused great concern at home and abroad.
3 high-performance epoxy composites
The high-performance epoxy composites research focus is to improve the moisture resistance, mechanical properties of compression after impact strength and layers. To improve the moisture resistance, just as epoxy electronic materials, to the introduction of naphthalene epoxy resin and curing agent, dicyclopentadiene, biphenyl, diphenyl ether, fluorene skeleton. Compression in order to improve the impact strength and mechanical properties between layers, can be used to improve the fracture toughness of epoxy curing, usually rubber or heat-resistant thermoplastic resin in the epoxy resin to form the island structure or interpenetrating network structure phase system.
4 fireproof epoxy materials
The vicious fires continue to occur so that people come to realize that the material is only a flame retardant is far from being able to achieve the purpose of fire prevention. First proposed aircraft material should have fire protection requirements, and has a flame retardant (flame retardant), less smoke, low toxicity (gas toxicity), low heat release rate and other performance requirements. Fire resistance of epoxy materials research and development, not only for the aviation, aerospace, vehicles, ships, home appliances, high-level and public places, construction and other areas are of great importance.
5 LCD epoxy resin
The liquid crystal epoxy resin is a polymer and orderly, the depth of crosslinking of the polymer network, which combines the advantages of LCD orderly and network cross-linked, compared with ordinary epoxy resin, its heat resistance, water resistance and are greatly improved impact resistance, can be used to fabricate high-performance composite materials; at the same time, the liquid crystal epoxy resin in the orientation direction of a small expansion coefficient, and its high dielectric strength, dielectric loss, can be used in high performance requirements the field of electronic packaging is a beautiful prospect of structural and functional materials by domestic and international attention.
The late start of the study of liquid crystal epoxy resin, is not yet mature. From a theoretical point of view, the curing process on the system ordered the curing process is an issue worthy of further study. The initial phase of the reaction system can affect the speed of response, speed of reaction affects the degree of order of the cured resin, the exact degree of order and degree of crosslinking of data has yet to solve. From the performance perspective of research and development, no systematic characterization of liquid crystal epoxy resin mechanical and electrical properties reported. At the same time, the use of liquid crystal epoxy modified the ordinary epoxy resin is a feasible way to achieve high performance epoxy resin, has important application value and broad market.
6 epoxy inorganic nanocomposites
Nanomaterials and nanocomposites developed rapidly in the past 20 years a new type of high-performance materials, and vitality in today’s new material, very important areas for future economic and technological development. Japan as a key project in the climbing program, China has also set up nano-materials science group. Nanomaterials is an ultrafine particle material, size 1-100nm. Therefore, the specific surface area and surface of conventional materials with special properties, such as the volume effect, the quantum size effect, macroscopic quantum tunneling effect and dielectric confinement effects. So with microwave absorption properties of nano-materials, high surface activity, strong oxidizing, superparamagnetic, and special optical properties, catalytic properties, photocatalytic nature, photoelectrochemical properties, chemical reactions, the nature of the chemical reaction kinetic properties and special The physical and mechanical properties. The application of nanomaterials is the traditional material, in particular, is a revolution of functional materials. Nano-materials and technologies for the development of epoxy coatings, adhesives, electronic materials, plastics, composites and functional materials to add high-tech, opened up a new way.