Abstract:
The present invention relates to TiO.sub.2 pigments having TiO.sub.2 particles with substantially discrete inorganic particles dispersed on the surfaces of the TiO.sub.2 particles. Suitable inorganic particles include silica, calcium carbonate, and mixtures thereof. The substantially discrete inorganic particles have an average diameter size within the range of about 5 to about 50 nm and are dispersed on the surfaces of the TiO.sub.2 particles in an amount of less than 20 wt. % based on total pigment weight. This invention also includes coating compositions containing these pigments and processes for making these pigments.
Abstract:
This invention provides new refractory binder compositions comprising silica and titania which can be used to make ceramic bodies, particularly bricks. The refractory binder compositions comprise about 70 to about 92 wt. % silica (SiO.sub.2) and about 8 to about 30% titania (TiO.sub.2). The refractory binder compositions may further comprise alumina and a metal oxide selected from the group consisting of calcium oxide, strontium oxide, and sodium oxide, and mixtures thereof. The refractory ceramic bodies can be used in hot corrosive/erosive environments such as in fluid bed chlorinators in the manufacture of titanium dioxide.
Abstract:
A TiO.sub.2 pigment particle having a surface coating of inorganic particles or mineral particles exhibiting improved light scattering efficiency of TiO.sub.2 at a moderate to high pigment volume concentration (PVC) and a low oil absorption when incorporated in coatings applications is disclosed, and methods of accomplishing the same.