Due to its good color absorbing capability, the distribution of particle size and adhering properties kaolin clay is the best for the paint industry and can also be used as a reasonable and cost effective extender pigmenting agent in the paint industry. Among them TiO2 is the best one to use. The china clay of the paint industry is distributed in different grades.
Properties
The physical properties China clay or kaolin clay is:
- It has a tint of faded yellow.
- It has low iron content.
- It is viscous
- It had high content of kaolin (hence the name)
- It is chemically inert
Advantages
- It helps in controlling the gloss
- It helps in adjusting the viscosity
- It also improves the strength of the coating
- Increases the resistance from, abrasion.
- Improves adhesion for the inner coat and lastly,
- It toughens and reinforces the coating.
Calcinated kaolin clay was used for ceramic paint. Calcinated kaolin is also used in the manufacture of paints, paper, rubber, plastics, pigments, pesticides, fertilizers etc. Hence are many Chemical Company in India who extract and specifically manufacture kaolin clay.
Kaolin clay is used as extenders for the formulations of paint the transformation of calcinated kaolin from kaolin. Calcinated Kaolin affects the properties which are crucial in a good paint, like scrub resistance, mud crack resistance sheen and gloss and a specific type of effect on opaque object.
