Why is my epoxy resin hardener yellow? | How to properly care and store your epoxy resin. скачать в хорошем качестве

Why is my epoxy resin hardener yellow? | How to properly care and store your epoxy resin.

The shelf life of MAS epoxy resins and hardeners is at least one year in sealed containers, but the material can last much longer when stored between 60-90°F in a dry place.  The product should be stored indoors, on a raised surface off the floor and away from exterior walls.  Do not allow epoxy resins or hardeners to freeze during winter storage.  After use, tightly reseal all containers.  With age or when stored improperly, you may encounter issues such as crystallization of the epoxy resin or yellowing of the hardener.  If there is any doubt about the condition of old material, we recommend mixing a small amount in a disposable cup to ensure it hardens before using it for a project. The recommended minimum temperature for clear coating and laminating is 55-60°F, but for bonding anything above 45°F should be sufficient. A chalky white appearance can happen when epoxy coatings have been allowed to gel below the recommended minimum temp. 30-65% relative humidity is ideal for manufacturing, but the MAS 2:1 Epoxy System is not as sensitive to ambient moisture as some other products.  Just be mindful not to let the curing epoxy come in direct contact with moisture while it is gelling, i.e. rain and dew. Be sure to keep containers tightly sealed when not in use to protect material from moisture contamination during storage.  A chalky white appearance can happen when epoxy coatings have been allowed to cure in temperatures below the recommended minimum temp of 55-60°F.  You may be able to turn the coating clear again by heating the area up with a space heater or heat gun, but more than likely you will have to sand off the chalky epoxy and recoat if you want the coating to be clear.  Potential failures down the road of the opaque coating could be a reduced life span and lower overall mechanical properties of the epoxy.  For best results, all materials and working conditions should be maintained at a constant 70°F-80°F. Epoxy is a temperature sensitive material. When cool, it’s thicker and sets slower. When warm, it’s thinner and sets faster. When working in conditions or with material below 70°F, epoxy may become to viscous to properly release air and self level. Working in conditions or with material above 80°F, it may set too quickly and exotherm, become too hot, which could cause it to yellow, distort or crack. Visit www.masepoxies.com Have questions and want to talk directly to one of our chemists? https://masepoxies.answerbase.com/