Coating Compositions for a Can and their Properties

Special requirements are currently imposed on paints and varnishes for the food can insides, associated primarily with the resistance to sterilization in various corrosive environments. Epoxy-phenolic coatings, including those that do not contain bisphenol A, replaced by low-toxic bisphenol E, meet these requirements. Coatings based on such materials possess a number of valuable properties, including good resistance to aggressive environments, drawability, hardness, etc. However, epoxy-phenolic coatings also have a number of disadvantages, which arise from spontaneous conglomeration and association processes that visually can be traced as a viscosity increase at storage. This paper is to evaluate the contribution of each polymer component of the composition in order to eliminate the negative effects of side processes that occur in epoxy-phenolic coatings during storage.