Advanced instrumentation methodologies to quantify dry film appearance and visual hiding

 
Formulators of decorative coatings around the world place high value on maximizing visual hiding while minimizing formulation cost. Single coat hide remains an elusive goal for many. Reduction of application defects and improvement of film uniformity requires both a macro and micro approach. While conventional rheology measurements coupled with drawdowns can predict flow and leveling performance, they are not fully representative of all application methods and shear conditions (spray, brush & roll). Traditional dry film analysis methods utilize visual comparisons against standards and are compromised by individual rater?s qualitative assessments. This paper presents a truly quantitative and comprehensive approach to achieving superior applied hiding via advanced rheology, surface profilometry and digital image analysis. The methodology enables formulators to optimize combinations of rheology modifiers and chemistries in any binder system for film uniformity and lower formulation cost. In addition, physical work to apply paint can be quantified & minimized.