The clear coat containing UV absorbers and light stabilizers

Epoxy materials are used frequently in industrial coatings. Despite the advantages of these properties there is one major drawback with using epoxy materials.  Discoloration may occur over a relatively short period of time when epoxies are exposed to Ultra Voilet (UV) light radiation from indoor lightening, or natural sunlight. The clear coat containing UV absorbers and light stabilizers is commonly applied to the surface for protection. EVERSORB EP4, a blend of UV absorber and HALS, is developed specifically for solvent borne epoxy coats.

Waterborne epoxy coatings - the green coatings - have been developed to replace conventional high VOC and solvent-based coatings.  It has overcome the disadvantages of traditional solvent-based coatings. It could be a challenge when light stabilizers are required to protect coatings to UV degradation.
EVERSORB EP5, a blend of UV absorber and HALS, is developed specifically for water borne epoxy coats. This paper is a comparison study of three different light stabilizers to disperse in water and waterborne epoxy coating. Design of Experiment (DOE) was used in this study. Our data confirmed that by increasing the concentration of EVERSORB EP5 in the top coat can effectively protect from UV light degradation. Furthermore, data also showed that by increasing the coating thickness, but not as effective as adding light stabilizers in the coating.