PRODUCTS BY FUNCTION
- Many industries, from paint and coatings to pulp and paper and ceramics, deal in slurry created from solid particles dispersed in water or other dispersion medium. Dispersants are additives which improve the efficiency of the dispersion process by uniformly dispersing solid particles within slurry to assist in lowering viscosity, enhancing stability (preventing settling/agglomeration of solid particles) or increasing concentration.
Dispersants are broadly divided into high-molecular weight dispersants and low-molecular weight dispersants. As seen in the figure, high-molecular weight dispersants adsorb to the surface of the solid particles and, through steric or electrostatic repulsion, disperse them to prevent against re-agglomeration.
Oppositely, low-molecular weight dispersants dramatically lower the interfacial tension between solid particles and the solvent. This lowered interfacial tension then improves the wetting of the solid particles with the dispersion medium, harnessing the dispersion effect. The combined use of both low-molecular weight dispersants for assisting dispersion and high-molecular weight dispersants for preventing the re-agglomeration of dispersed particles is also quite common.
Dispersants for Pigments
The pulp and paper and paint and coatings industries use calcium carbonate, titanium oxide, kaolin, clay, carbon black and a variety of other pigments as fillers and coloring materials. In the majority of cases, these pigments are used after being made into slurry using dispersants, with the appropriate dispersants selected and utilized based on the pigment type and application.
We offer a full lineup of dispersants from ones with exceptional toning properties and excellent water resistance to others used in improving toning and increasing the efficiency of grinding/dispersion.
Inorganic materials are generally used as the raw materials for ceramics. In terms of formability and functionalization, these inorganic materials highly control purity and particle diameter as well as size distribution and shape and are used in high concentration in the form of slurry. Our dispersants for ceramics leave no ash (metallic elements) after firing, giving them a high quality that further assists in the dispersion and formation processes of inorganic materials during the production of ceramics and contributing to improvements in overall quality and production efficiency.