Commercial grades of titanium dioxide are rarely pure. Most consist in multilayer
inorganic structures with a TiO2 core. In some cases, an organic treatments
is deposited on the surfaces of the TiO2 particles to improve compatibility
and dispersability. The number and the nature of the layer combined with a controlled
particle size distribution are parameters differentiating a grade from an other.
It is then possible to control optical properties (Opacity, undertone) or performances
such as dispersability, processability or durability.
The interactive picture below illustrates the typical structure of a commercial TiO2 suitable
for plastics.
