D.E.R 321 Epoxy resin Dow Chemical Epoxy Resins >> Bisphenol A based Marine /Anti-Corrosive / Protective >> Marine Marine /Anti-Corrosive / Protective >> Heavy duty (anti-corrosive) D.E.R.* 321 liquid epoxy resin is a reaction product of epichlorohydrin and bisphenol-A modified with an aromatic monofunctional reactive diluent. D.E.R. 321 liquid epoxy resin is an orthocresyl glycidyl ether diluted standard bisphenol-A based liquid epoxy resin, of extremely low viscosity. The low viscosity is advantageous in compounds containing large amounts of filler. D.E.R. 321 has a cure rate similar to unmodified bisphenol-A based liquid epoxy resins. The reactive diluent limits the solvent resistance somewhat. An improved acid resistance can be achieved using D.E.R. 321 resin in place of D.E.R. 331 liquid epoxy resin. D.E.R. 321 liquid epoxy resin exhibits a very low tendency to crystallize. It can be hot or cold cured by blending with polyamine, polyamide and modified versions of these. Elevated temperature cures are necessary and post-cures required to develop full end properties if anhydride or catalytic curing agents are employed. Marine & Protective Coatings Reaction product of epichlorohydrin and bisphenol-A modified with an aromatic monofunctional reactive diluent. Used in marine and protective coatings. Offers low viscosity and a cure rate similar to unmodified bisphenol-A based liquid epoxy resins. Gives a very low tendency to crystallize. Can be hot or cold cured by blending with polyamine, polyamide and modified versions of these.