What is the Oil Absorption of Titanium Dioxide?
Oil absorption is not a pigment characteristic of titanium dioxide, but an indicator to evaluate the pigment merit of titanium dioxide for pigment. Titanium dioxide for pigments requires the lower the oil absorption, the better, to save the base material for the paint. The so-called oil absorption is the minimum number of grams of oil required to wet 100g of titanium dioxide completely. The amount of oil used to bond the pigment to the oil is the first oil absorption, and the amount of oil needed to paint the consistency of the avenue is the second oil absorption. In water-based paints this is called water absorption. If the pigment particles are fine, the specific surface area is large, there are more particles for coagulation and flocculation, the gap between particles is large, the oil absorption will be high, close to the spherical particles then the oil absorption is low.
In general, the oil absorption of anatase titanium dioxide is ≤22k/100g and rutile titanium dioxide is ≤20g/100g. It is worth noting that for some applications the lower the oil absorption does not mean the better.
