Dytek HMD 90 1,6-Hexanediamine 124-09-04 Invista Crosslinking / Coupling / Curing Agents >> Amine Epoxy Resins General Industrial /Maintenance A greater than 99.9% pure aliphatic diamine, available from 70 to 100 wt% concentrations in water. Aqueous solutions of 70 to 80 wt% HMD are liquids. Higher concentrations are solids at room temperature, but shipped (bulk) as warm liquids. epoxy curing agent in industrial coatings Pure aliphatic diamine in water. Used as an epoxy curing agent in industrial coatings. Possesses compatibility with isocyanates, epoxy and polyamide resins.