Study on bisphenol formaldehyde/resorcin copolymerization epoxy resin cured with dicyandiamide

The bisphenol formaldehyde /resorcin copolymerization epoxy resin(BPF/R EP) was synthesized by using bisphenol formaldehyde、resorcin and epichlorhydrin in order to obtain the better epoxy resin.Curing reactions of BPF/R EP system containing dicyandiamide were studied with differential scanning calorimetry(DSC),and the curing systems and curing condition were studied systematically with 2-ethyl-4-methyl imidazole(2E4MZ) accelerating dicyandiamide(DICY),which affected the property of BPF/resorcin copolymerization epoxy resin condensate.The results suggested that the best curing craft was that BPF/R EP with the ratio of BPF/ resorcin 20:80,2E4MZ was 4%,DICY was 6%,and curing temperature was 110℃and curing time was 3hours.