Synthesis and physico-chemical evaluation of water-soluble epoxy ester primer coating

The objective of this paper was to formulate high performance water-based paints by an esterified epoxy resin, synthesized by reacting epoxy resin with pyromellitic dianhydride (PMDA) and pigmented with non-toxic phosphate using varying pigment-volume concentrations (PVCs). The influence of pigment concentrations on some physico-chemical properties was evaluated and assessed for the optimized PVC coating formulation. The structural and thermal stability of the epoxy ester vehicle was also evaluated through FT-IR and thermogravimetric analysis (TGA). Film properties of the coatings were studied and it was found that the coating composition at lower PVCs exhibited better film property over higher PVCs.