Nano-Particle Reinforced Latex Dispersions With Modified Colloidal Silica

By Peter Greenwood

The impact of adding epoxysilane-modified colloidial silica to water-based coating formu­lations on the mechanical properties of resin films was studied. In general, the effect of the sil­ica particles depended strongly on the resin and other components of the coating formulation but very significant improvements of hardness could be observed.

The effect on the abrasion re­sistance of the coatings was less clear but still noticeable in many coating systems. Also, the modification ensures good compatibility with the resins and that the aesthetic properties of the coating (gloss and haze) are not compromised

Addition of silica particles to waterborne wood lacquers enhances the grain structure in a manner similar to solventborne lacquers.