... ,3,6-tetrahydrophthanlic anhydr Nadic anhydrideName: Nadic anhydride, Carbic anhydride, 5-Norbornene-2, 3-dicarboxylic anhydride, 3,6-Endomethylene- 1,2,3,6 ... , smoothness, electrical property, corrosion resistance and mechanical strength than phthalic anhydride and THPA Used for epoxy resin curing agents in casting ...