a process for reducing the concentration of epichlorohydrin by - products in the manufacture of polyamide - epichlorohydrin resins , comprising reacting polyaminopolyamide prepolymer in aqueous solution with epichlorohydrin and an immiscible solvent for the epichlorohydrin , continuing the reaction of the prepolymer with the epichlorohydrin to produce the desired viscosity of the aqueous phase , stabilizing the resin product by diluting or acidifying the aqueous phase , separating the solvent from the aqueous resin , and treating the solvent phase with caustic to convert epichlorohydrin by - products to epichlorohydrin for recycling .