Лако-красочные материалы — производство

Type I epoxy systems are aqueous emulsions of liquid epoxy resins (with epoxy equivalent weight ~200). In this type of waterborne epoxies, no external emulsifiers are used, but rather, curing agents (fatty polyamide type) serve as emulsifiers due to their amphiphilic nature. Liquid epoxy resin and curing agent are mixed in calculated quantities just prior to application and emulsified into water under high-shear conditions (stirring). Emulsion droplets, consisting of resin and cross-linker, are intimately mixed. After application, water evaporates and droplets coalesce to form a film with uniform morphology. Such systems have a shorter pot life (~2 h), and the films have high hardness, low flexibility and low impact resistance.