naphthalene naphthalene sulfonate (NNO) is used as a dispersant in pigment and dye formulations:
- Paints: NNO keeps inorganic pigments like iron oxides, chromates, carbon blacks dispersed in water-based and solvent-based paints.
- Printing inks: It disperses various dye and pigment particles uniformly in ink formulations for screen, gravure, flexo printing.
- Coatings: Used to disperse colorants in water-based and solvent-based coating systems like architectural, automotive coatings.
- Plastics: Enables uniform coloration of plastics by dispersing dyes/pigments that would otherwise flocculate during processing.
- Textile dyes: Important dispersant for dispersible and reactive dyes applied to fabrics via exhaust dyeing process.
- Inkjet inks: Key role in stabilizing nano-pigment dispersions for high-resolution printing applications.
- Toners: Disperses colorant particles in liquid and dry toner formulations used in photocopiers, laser printers.
- Ceramic glazes: Aids even color distribution by preventing clay particle agglomeration in glaze slips.
- Cosmetics: Provides stable dispersions of inorganic pigments in makeup, nail polish and personal care formulations.
