Epoxy resins may be reacted (cross-linked) either with themselves through catalytichomopolymerisation, or with a wide range of co-reactants including polyfunctional amines, acids (and acid anhydrides), phenols, alcohols and thiols (sometimes called mercaptans). These co-reactants are often referred to as hardeners or curatives, and the cross-linking reaction is commonly referred to as curing.
Reaction of polyepoxides with themselves or with polyfunctional hardeners forms a thermosetting polymer, often with favorable mechanical properties and high thermal and chemical resistance. Epoxy has a wide range of applications, including metal coatings, composites,[2] use in electronics, electrical components (e.g. for chips on board), LEDs, high-tension electrical insulators, paintbrush manufacturing, fiber-reinforced plastic materials, and adhesives for structural[3] and other purposes.[4][5]
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