Epoxy resin E-51 and diethanolamine were selected for ring-opening addition,hydrophilic groups were introduced into hydrophobic epoxy resin molecules,and a aqueous epoxy resin system was obtained after adding acid to form salt.The products were analyzed by FT-IR and TGA.The effects of reaction temperature,reaction time,etc.on the reaction products were studied,the optimal reaction temperature was 80 ℃ and the optimal reaction time was 3 hours.The surface drying time,adhesion,hardness and flexibility of hydrophilic modified epoxy resin film were studied,and the results showed that the surface products had good application value.
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