A eco-friendly epoxy emulsifier was synthesized from citraconic anhydride

itaconic anhydride

polyethylene glycol and epoxy resin without catalyst. The aqueous epoxy emulsion was prepared by phase inversion method. The structure and particle size distribution of the emulsifier and emulsion were characterized by 1H-NMR

IR

GPCand laser particle size analyzer. It was found that the emulsion have narrow particle size distribution and excellent stability. The waterborne epoxy coating was prepared with the aqueous epoxy emulsion. The performance and morphology of the coating were characterized using a thermogravimetric analyzer

scanning electron microscopy

and contact angle measurement instrument

and test the conventional performance and corrosiveness of the coating. The results show that the drying time of the waterborne epoxy coating is 20 minutes (surface dry) and 12 hours (solid dry)

and the mechanical properties of the coating are excellent. The volatile organic compound (VOC) content is 22 g/L

and it exhibits excellent water resistance (1000 hours) and corrosion resistance (800 hours for neutral salt spray test).