Modified titanium white covered by Al₂O₃ and SiO₂ – characteristics and application in acrylic paints

In this study, titanium white was investigated, covered with aluminium oxide and silica. The titanium white was produced by Chemical Works Police S.A. under the catalogue symbol of R‐210. Surface of titanium white was modified with silane coupling agents, such as 3‐methacryloxypropyltrimethoxysilane (A‐174), vinyltrimethoxysilane (U‐611) and N‐2‐(aminoethyl)‐3‐aminopropyltrimethoxysilane (U‐15D). The unmodified and the modified titanium white was subjected to physicochemical analysis. Moreover, tests were performed aiming at defining morphology, surface structure, and dispersion of the particles as related to, first of all, the type of applied modifier. Product evaluation took advantage of modern investigative techniques, including SEM and DLS. Modified and unmodified titanium whites were applied as pigments in acrylic paints. The modified Titanium dioxide in particular improved strength and utility properties of studied paints.