What Are the Application and Characteristics of Epoxy Resin?

The epoxy resin is frequently used in daily life, but many people are unfamiliar with the role and use of epoxy resin. What are the roles and uses of epoxy resin?

What is epoxy resin?

The epoxy resin is a kind of polymer containing more than two epoxy groups on the molecule. It is commonly made by condensation polymerization of bisphenol A and epichlorohydrin, polyols and so on. The world's first plastic phenolic resin was an epoxy resin. Due to the epoxy group contained in the molecule, curing agent is often added to make it undergo ring-opening polymerization reaction, so that it can be cross-linked from linear polymer to form a network polymer, which can be used as thermosetting resin. Epoxy resin is easy to cure, and has characteristics of heat resistance, impact resistance, fatigue resistance, and electrical insulation, so it works as paint and adhesive, insulating resin and other roles in construction, electrical appliances, aerospace and other aspects.

The role and use of epoxy resin

Generally speaking, the epoxy resin is a general term for organic polymer compounds containing two or more epoxy groups in the molecule. Because the molecular structure contains active epoxy groups, they can be cross-linked with various kinds of curing agents to form insoluble, non-melting polymers with three-way network structure. It is a high-quality adhesive, with excellent physical and electrical insulation properties, high strength, low shrinkage, corrosion resistance, high insulation and other advantages, so it is called the universal adhesive. Now the output of epoxy resin is very high, and the application is extremely wide. In fact, there are many uses of epoxy resin. Epoxy resin is used in the production of coatings, glue adhesives, composite materials, molded materials, casting materials and other products, which are widely used in various fields. Whether in construction engineering or electronic appliances, and even medical technology, epoxy resins have played a great role.

The application advantages of epoxy resin

Epoxy resin has been widely used in metallurgy, coatings, composite materials, electronics, electric machinery and other fields. Its main advantages:

(1) The hardening shrinkage rate of epoxy resin is very low and the dimensional stability is very good.

(2) The chemical properties of epoxy resin is very stable. It will not be eroded and destructed by ordinary acid and base, chemicals, and industrial solvents.

(3) Epoxy resin has excellent adhesion to many materials, and has high strength mechanical properties, can withstand long-term environmental stress, with a high degree of reliability.

In fact, the biggest advantage of epoxy resin is its variability. Through the adjustment of the composition formula, it can cure quickly, or it can be left for a long time without reaction. It can become a hard filling glue, or it can be made into a flexible soft glue.