Design and Application of Water-Borne Resins for Coating Purpose

Abstract

Water-borne coatings help to slash the emission of volatile organic compounds during coating process. Their developments, however, have frequently met serious problems as to their applicability and water-resistance because water has peculiar properties such as slow volatility and extremely high polarity. Since resins comprising water-borne coatings are usually organics, they form disperse system in water medium. The heterogeneity allows new design of resin from a stereoscopic viewpoint and of cross-linking system with the help of water, whereas water-borne resins, especially polyesters should be used with due attention to their hydrolytic stability. This article provides a perspective on design of water-borne resins and cross-linking system on the basis of our studies, together with trends in typical branches of water-borne coatings.