At present, the classification of epoxy resin is not uniform. Generally classified by strength, heat resistance grade and characteristics. The main varieties of epoxy resin are 16, including general adhesive, structural adhesive, high-temperature adhesive, low-temperature adhesive, water-wet adhesive, conductive adhesive, optical adhesive, spot welding adhesive, epoxy resin film, foam adhesive, strain adhesive, soft material adhesive, sealant, special adhesive and latent curing.
As an anticorrosive material, epoxy resin not only has the characteristics of compactness, water resistance, good leakage resistance and high strength, but also has good manufacturability such as strong adhesion, normal temperature operation, simple construction and the price is moderate.
Extended data:
Epoxy resin is generally used with additives at the same time to obtain application value. Additives can be selected according to different uses. Commonly used additives are: curing agent; Modifier; Filler; Diluent; Others.
Curing agent is an essential additive, and curing agent should be added whether it is used as adhesive, coating or castable, otherwise epoxy resin cannot be cured.
Due to different performance requirements, the requirements for epoxy resin and additives such as curing agent, modifier, filler and diluent are also different.
The reaction between epoxy resin and curing agent is carried out by direct addition reaction or ring-opening polymerization reaction of epoxy groups in resin molecules, and no water or other volatile by-products are released. Compared with unsaturated polyester resin and phenolic resin, they show very low shrinkage (less than 2%) during curing.
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