Resins

Epoxy Resin

Their various physical and chemical properties and electrical characteristics make epoxy resins a material of choice for use in electro-technical and electronic applications. 

Preparing of the resin

  • Epoxy resins are generally available in the form of two components reacting together either at room temperature or when heated.
  • Possibly heat the resin to around 50°C to avoid the phenomenon of cold crystallisation.
  • Mix the fillers together by slow mechanical agitation at the bottom of the pot, to avoid including air (avoid decanting the fillers).
  • Add the hardener in the proportions indicated in the table and mix together with a slow mechanical action taking care to avoid including air.

Using the resin

Depending on the type of resin and according to its use, it is recommended to:
  • Preheat the parts to remove any moisture and promote penetration of the resin by reducing its viscosity.
  • Pour the resin at room temperature and atmospheric pressure.
  • In certain cases, to optimise the resin’s characteristics, it may be used in a vacuum, especially in the case of high voltage equipment. The absence of solvents allows use in extreme vacuums (a few mbars).

Precautions concerning the hardener

  • By virtue of the chemical properties of the hardener, we recommend not leaving it too long in contact with the air because of its sensitivity to humidity, and closing the package after use.

Storage conditions

  • Three to six months, depending on the product being kept closed in its original packing, out of the sun and away from heat sources (store at less than 25°C).

Packaging

  • In tubs of 1, 5, 12 and 30 litres and drums of 220 litres.
Impregnation / Potting / Encapsulation
Epoxy resins are distinguished by the following properties:
  • Ability to withstand heat.
    Resistance to thermal shocks.
  • Penetration (wettability).
  • Adhesive property.
  • Resistance to chemical agents.
  • Self-extinguishing.
  • Thermal conductivity through the addition of appropriate fillers.

Résine

Health and safety
Epoxy resins present no particular toxic character. However, we advise working in a ventilated area and avoiding all contact with the skin.

Refer to the CRAM brochure for the use of epoxy resins and their hardeners.

 
Content casting Epoxy resins