Titanium dioxide（Tio2） is a white compound used as an important pigment in the coating industry which is quite efficient because it scatters visible light resulting in increased brightness, whiteness and opacity. Due to these characteristics it is widely used in the paints and coatings industry.
Titanium dioxide has two commercial crystal structures. One is anatase tio2 and the other is rutile tio2. Rutile titanium dioxide pigments are preferred over the former due to better efficiency in scattering the light. They are also more durable and stable as compared to tio2 anatase pigments.
The appearance of titanium dioxide is determined by particle size and surface composition coated. Physical, chemical and photochemical properties entirely depend on these two characters. Titanium dioxide pigments are dispersed accordingly due to their insolubility in coating vehicles. On a commercial scale, titanium dioxide coated with organic and inorganic surface modifiers. Inorganic surface modifiers are forms of alumina and silica precipitates.
Inorganic surface treatments:
Good performance properties
Dispersion in varieties of organic liquids and water
Hiding powder
Resistance for discoloration by heat reduction
Chalk resistance
Organic surface treatments improves:
Dispersion in water-based and oil-based coatings
Its usage value in coating formulation by varying combinations