Zigma processes aluminum silicate clay mineral - Kaolinite used by the coatings industry. Superior Kaolin grades from exclusive mines is water washed to remove mineral impurities then bleached,classified and calcined at higher degree of temperature to attain bright white pigmentation properties.
These grades are made even more versatile through chemical modification available with dispersant coatings for easy dispersion in water, as well as stearate or silane surface treatment for improved compatibility with organic matrices.
Rubber Industry uses various fillers at each step from rubber vulcanization to color, reinforce, extend, and to reduce the cost of compounds.
The primary use of brighter Kaolin in coatings is as a titanium-di-oxide extender in water-borne architectural paints. Calcined Kaolin clays generally provide the best brightness, titanium dioxide extension and dry hide. Water washed and processed grades contribute to extension and dry hide, as well as covering power and gloss control.
