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Knowledge about epoxy resin

Epoxy resin refers to a general term for a class of polymers containing more than two epoxy groups in the molecule. It is a polycondensation product of epichlorohydrin and bisphenol A or polyol. Due to the chemical activity of the epoxy group, a variety of compounds containing active hydrogen can be used to open the ring, solidify and crosslink to form a network structure, so it is a thermosetting resin.

Bisphenol A epoxy resin not only has the largest output and the most complete varieties, but also the new modified varieties are constantly increasing, and the quality is constantly improving.

China has conducted research on epoxy resins since 1958 and has put it into industrial production at a rapid rate. It has been developing vigorously throughout the country. It also produces various types of new epoxy resins to meet the urgent needs of national defense construction and various sectors of the national economy.

The classification of epoxy resins has not yet been unified. Generally, they are classified according to strength, heat resistance, and characteristics. There are 16 main types of epoxy resins, including general-purpose adhesives, structural adhesives, high-temperature resistant adhesives, low-temperature resistant adhesives, water, and wet surfaces. 16 types of glue, conductive glue, optical glue, spot welding glue, an epoxy resin film, styrofoam, strain glue, soft material bonding glue, sealant, special glue, latent curing glue, civil construction glue.

The classification of epoxy resin adhesives in the industry also has the following divisions:

1. According to its main composition, it is divided into pure epoxy resin adhesive and modified epoxy resin adhesive;
2. According to its professional use, it is divided into epoxy resin adhesives for machinery, epoxy resin adhesives for construction, electronic epoxy resin adhesives, epoxy resin adhesives for repair, traffic adhesives, and marine adhesives. Wait;
3. According to its construction conditions, it is divided into normal temperature curing adhesive, low temperature curing adhesive and other curing adhesives;
4. According to its packaging form, it can be divided into single-component glue, two-component glue, and multi-component glue;
There are other sub-methods, such as solvent-free glue, solvent-based glue, and water-based glue. However, the application of component classification is more.

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