As environmental pressures continue to drive more sustainable coatings, polyaspartic coatings solutions have come more into focus with low to zero VOC and excellent performance characteristics. With broader adoption of this technology, there is now a greater need for matte finishes. However, this coating type is very difficult to matte.
Low to zero VOC coatings, such as polyaspartic systems have minimal film shrinkage, requiring higher levels of matting agents to obtain a matte finish. In addition, the typical application of polyaspartic coatings, on floors or steel beams, requires higher film build. This increases the silica loading needed for gloss reduction adversely effecting viscosity, making the coating difficult to handle.
This paper highlights a specially engineered synthetic silica matting agent ideal for matting polyaspartic systems. This silica technology is compared to other silica matting agent types of various manufacturing processes, physical properties, and treatment chemistries. The results provide an understanding of the effects of silica in these coatings and demonstrates the advantages of this unique matting agent technology in polyaspartic systems.
Bob is an Applications Manager with Evonik Corporation’s Silica Business Line. He has twelve years of coatings experience in both polymers and industrial coatings with DeSoto, Inc. and Valspar Corporation. He has worked on the application of silica and carbon black in coatings for over twenty years. He received his B.S. in Chemistry from University of Illinois.