The curing rate and the degree of the curing reaction of epoxy resin were characterized with the hardness of coating film. The effects of content of six accelerators(hexamethylenetetramine,triethylamine,triethanolamine,urea, N,N-dimethylformamide and triethyl benzyl ammonium chloride)on the curing rate of dicyandiamide-epoxy resin curing system and of the six accelerators at optimum content on the curing temperature and time, storage time at room temperature of dicyandiamide-epoxy resin, water absorption ratio and swelling degree of the coating film were investigated. The results showed that the optimum content of accelerators was 1.5%~2.5%;the promoting effect of triethylamine on the curing of dicyandiamide-epoxy resin was the greatest and the curing temperature of dicyandiamide-epoxy resin was reduced to 120℃;the room temperature storage time of dicyandiamide-epoxy resin curing system with triethyl benzyl ammonium chloride was over 2 months;and, the water absorption ratio and swelling degree of the coating film were reduced by the six accelerators.
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water absorption rate