In Part 1 of this series, ceramic microspheres and glass bubbles were evaluated in a high-solids, two-part epoxy coating for industrial applications and other end uses such as concrete floor coatings. Benefits included higher volume loadings and lower VOCs at lower viscosities, in addition to better film integrity, as manifested by improved abrasion resistance. Part 2 of this series evaluates the same ceramic microspheres, silica matting agents and nepheline syenite in a waterborne, UV-curable polyurethane dispersion. Conventional silica matting agents are commonly used for these coatings. Ceramic microspheres and nepheline syenite are crystalline silica-free pigments. Properties such as matting efficiency, scratch resistance and viscosity control were studied in addition to the effect each material had on clarity and haze. All of these properties are important in obtaining a final finish that is both decorative and functional.
Learn more about Functional Fillers for Matting and Performance Enhancements in Waterborne, UV-Curable Coatings (PDF, 1.6 Mb)