Development of Low Viscosity Waterborne Epoxy Curing Agent Derived from Isophorone Diamine
In this paper,waterborne epoxy amine curing agents were synthesized using isophorone diamine,polyethylene glycol diglycidyl ether,bisphenol A-type epoxy resin E51,and isooctyl acrylate.The impact of varying dosages of E51 and isooctyl acrylate on the viscosity of the curing agents was investigated.The structure of the synthesized curing agents was characterized by Fourier infrared spectroscopy.Furthermore,the surface drying time of waterborne epoxy coatings formulated with different curing agents,as well as the hardness,media resistance,and corrosion resistance of the cured coatings,was explored.Additionally,the salt spray resistance of epoxy zinc-rich coatings with varying zinc powder contents was examined.Results indicated that higher dosages of isooctyl acrylate led to lower viscosity of the synthesized curing agent,slower surface drying time,lower hardness of the cured coating,improved dielectric resistance,reduced water absorption rate,and enhanced corrosion prevention properties.The results also revealed that the higher zinc powder content in the coating,the better the salt spray resistance.
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