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Hardeners which show only low or limited reactivity at ambient temperature, but which react with epoxy resins at elevated temperature are referred to as latent hardeners. When using latent hardeners, the epoxy resin and hardener may be mixed and stored for some time prior to use, which is advantageous for many industrial processes.
The left component is Epoxy Base Resin and the right one is Epoxy Hardener. Both are to be mixed thoroughly in equal quantity to get epoxy putty. Epoxy putty refers to a group of room-temperature-hardening substances used as space-filling adhesives. Exact compositions vary according to manufacturer and application.
It is primarily used as a crosslinker ("hardener") in epoxy curing. [ 4 ] [ 5 ] TETA, like other aliphatic amines, react quicker and at lower temperatures than aromatic amines due to less negative steric effects since the linear nature of the molecule provides it the ability to rotate and twist.
Epoxy resins are typically cured by the use of additives, often called hardeners. Polyamines are often used. The amine groups ring-open the epoxide rings. In rubber, the curing is also induced by the addition of a crosslinker. The resulting process is called sulfur vulcanization.
Epoxy functional resins can be homo-polymerized with anionic or cationic catalysts and heat, or copolymerised through nucleophilic addition reactions with multifunctional crosslinking agents which are also known as curing agents or hardeners.
A package of J-B Weld, showing "hardener" (red tube) and "steel" (black tube of resin): equal amounts are squeezed from both tubes and mixed. The J-B Weld Company is an international company that produces epoxy products. The home office is based in Sulphur Springs, Texas. [1]
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