Research on oil absorption of titanium dioxide at home and abroad is in its infancy

At present, the research on the oil absorption of titanium dioxide at home and abroad is still in the initial stage.
The influencing factors of the oil absorption are systematically studied from the aspects of grinding volume, grinding time, coating process, etc.
, and the method of reducing oil absorption is explained in combination with the actual situation.
Du Hongtao et al.
studied the method of determining the oil absorption of aluminum hydroxide for fillers, and studied the factors such as particle size, temperature, and time
.


Pigment is a kind of colored fine particle powder material, generally insoluble in water, and can be dispersed in various oils, solvents, resins and other media
.
The application of pigments is very wide, and various colored products are basically added with pigments
.
Pigments have several important indicators, such as dispersibility, tinting power, hiding power, oil absorption, etc.
The oil absorption represents the minimum amount of oil required when 100g of the pigment is fully wetted
.


Oil absorption is a manifestation of the relationship between the pigment powder and the vehicle.
It not only reflects the mixing ratio, wetting degree, and dispersion performance between the pigment powder and the vehicle, but also relates to the formulation of the coating and the film formation.
Multiple properties
.


For solvent-based coatings, plastics and other fields, high oil absorption will greatly increase the application of base materials and cause thickening.
Therefore, high oil absorption will cause many disadvantages in these fields
.


However, in fields such as flat emulsion paints, in order to achieve high dry hiding power, pigments with large oil absorption must be used to meet the requirements
.
In these fields, titanium dioxide with a high amount of loose silicon treatment on the surface is usually used.
The oil absorption of these titanium dioxide is usually 35 or even more than 40
.