Evan Montanez holds a B.S. degree in Chemistry from Middle Tennessee University (Murfreesboro, TN). Highly experienced in specialty chemical product development and coatings formulation, Evan joined Coadtech in 2019 as a part of their North American expansion. He is an active member of the Cool Roof Rating Council and the American Coatings Association. He now specializes in promoting next generation technologies, with a focus on the sustainable and the climate resilient.
Silane-treated colloidal silica nanoparticles offer an exciting opportunity for formulators looking to match the performance of sustainable waterborne coatings to that of high-performance solventborne products. The present study explains the chemical treatment and stabilization processes that allow for pH-neutral colloidal silica nanoparticles. The stabilization of the nanoparticles allows for longevity and stability in the formulation over a wide pH range. The ability of the nanoparticles to migrate in the coating is explored in this study, and the effects of this migration are discussed. The study examines how the desirable properties (such as hardness, surface modification, increased friction coefficient) are imparted by waterborne silica nanoparticles without impacting optical properties such as gloss or color. The study compiles tests in several applications to showcase how surface modification and the hydrophilic nature of the nanoparticles can help improve properties such as: surface wetting, corrosion and chemical resistance, drying mechanism, open-time modification, scratch resistance, anti-blocking, early rain resistance, wet and dry adhesion, and dirt pick up.