D.E.R 664U Epoxy resin 25036-25-3 Dow Chemical Epoxy Resins >> Bisphenol A based Coatings >> Powder Coatings Powder coating >> Architectural / Decorative D.E.R.* 664U solid epoxy resin is a medium molecular weight reaction product of liquid epoxy resin and bisphenol-A. D.E.R. 664U epoxy resin is a medium molecular weight solid epoxy resin used mainly in powder coatings. It can be incorporated in both decorative and functional coatings to provide improved viscosity characteristics and greater flexibility. D.E.R. 664U epoxy resin can also be used for epoxy esters, with the addition of an appropriate catalyst. This product is suitable for use in powder coating applications. Medium molecular weight reaction product of liquid epoxy resin and bisphenol-A. Used in powder coatings for decorative and functional coatings. Provides improved viscosity characteristics and great flexibility.