Incorporation of elastomeric secondary phase into epoxy matrix influences mechanical properties of epoxy coatings

Abstract There are two parts by which epoxy coatings are generally packaged. These two parts which are mixed before application consist of (1) an epoxy resin be cross-linked and (2) a toughening agent or hardener. The formulation of epoxy coatings is done on the basis of performance required for the end product. On proper catalyzation, a hard, chemical and solvent resistant finish can be produced by epoxies. To protect concrete and steel from water, alkali and acids, epoxy coatings are generally given on them. Unfortunately, it is seen that highly cross-linked networks are brittle in nature and as a result, they cannot be applied widely for the cases where high impact fracture strength is required. This limited utility can be overcome by toughening the easily broken composites through the incorporation of rubbery materials into them. Specific selection and combination of the epoxy and the hardener are the key factors to determine the characteristics and suitability of epoxy coating for a given situation.