Epoxy Resin

Definition - What does Epoxy Resin mean?

Epoxy resin refers to a type of reactive prepolymer and polymer containing epoxide groups. These resins react either with themselves in the presence of catalysts, or with many co-reactants like amines, phenols, thiols, etc.

Epoxy resin has many industrial applications for a variety of purposes. It possesses higher mechanical properties and more thermal and chemical resistance than other types of resin. Therefore, it has exclusive use in making aircraft components.

Epoxy resin is also called polyepoxides.

Corrosionpedia explains Epoxy Resin

Epoxy resin is a type of resin that possesses tough mechanical properties, good chemical resistance, and high adhesive strength, which makes it highly useful for various applications. Epoxy resin's uses are:

  • Metal coatings
  • Use in electronic and electrical components
  • Electrical insulators
  • Fiber-reinforced plastic materials
  • Structural adhesives

Epoxy resin also finds uses in caulking and casting compounds, sealants, varnishes and paints, and other industrial applications.

Epoxy resin is superior to other types of resins because it has low shrink during cure, and excellent moisture and chemical resistance. It is impact resistant, it has good electrical and insulating properties, and a long shelf life. The various combinations of epoxy resins and reinforcements gives a wider range of properties obtainable in molded parts.

Epoxy resin is different from polyester resins with regard to curing. It is cured by a curing agent called "hardener" rather than a catalyst.

Although some epoxy resins bond better than others to different materials, all epoxies are not waterproof. Some are not recommended for long-term submersion or for use below the water line in marine applications.

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