Use of optical density and TiO2 light scatterung to identify optimization potential in architectual coatings

Optical density is a technique that evaluates the amount of light scattered by particles in a suspended paint sample, after developing an improvement in it, is now possible to understand the titanium dioxide (TiO2) light scattering efficiency without knowing the complete paint formulation. Spreading rate analyses take into consideration the TiO2 amount to define this material scattering coefficient in the dry paint film. With these analyses it was possible to identify how well the TiO2 was dispersed in the liquid paint and how evenly distributed in the dry paint film it was (dispersion/flocculation problems or crowding effect during drying process) which we called TiO2 dispersion efficiency and formulation efficiency. Some paints presented an opportunity to improve the TiO2 dispersion in almost 20% and the formulation (extenders/fillers, resin, etc.) in 55%. After defining the TiO2 usage efficiency it was possible to compare paints from different countries in Latin America.
Duration: 15:06
Speaker: Abrahao. R.T.
Company: DuPont Company
Conference: European Coatings Congress
Session: Titanium dioxide technology
Location: Nürnberg
Date: 20.04.2015