Kaplama sektöründe, pigment dispersant has become an indispensable chemical role because of its unique properties and functions. These amazing chemicals are not only oleophilic, but also have a hydrophilic, they are like the balance master in the paint, dominating the dispersion of the pigment in the liquid, preventing the precipitation and condensation of the pigment particles, creating a stable suspension.

Diversity of pigment dispersants
The diversity of pigment dispersants is reflected in the richness of their types, including non-ionic surfactants, anionic surfactants, cationic surfactants and amphoteric surfactants. The choice of these dispersants depends on the nature and use of the paint, and different types of coatings require different types of dispersants.

Anionic surfactants: Anionic surfactants, such as sodium hexametaphosphate, sodium oleate and sodium alkyl sulfate, are commonly used in solvent-based and water-based coatings. They effectively improve the dispersion of pigments and provide good stability for coatings.

Cationic surfactants: Cationic surfactants, such as octadecenamine acetate and alkyl quaternary ammonium salts, are mainly used in non-aqueous dispersion coatings. They help the pigment disperse better in the solvent, improving the overall stability of the paint.

Nonionic surfactants: Nonionic surfactants, including fatty acid polyoxyethylene ester and alkyl phenol polyoxyethylene ether, commonly found in water-soluble coatings. This kind of dispersant has excellent dispersion and wettability, and plays a key role in the dispersion of pigments.

Amphoteric surfactants: Amphoteric surfactants, such as soy lecithin, form bilayer structures by adsorbing to the surface of pigments, increasing the wettability of particles and improving dispersibility. This has a positive effect on the stability and dispersion of the paint.

Pigment dağıtıcıların çalışma prensibi ve kaplama endüstrisindeki uygulamaları

How pigment dispersants work
The working principle of pigment dispersants is based on adsorption and surface activity principles. By adsorbing to the surface of the pigment particles, the pigment dispersant changes the surface properties and energy state of the particles, which is explained by Young’s theorem.

The polymer pigment dispersant forms an adsorption layer on the surface of the particles, which increases the charge on the surface of the particles and enhances the reaction force between the particles. This prevents the electrostatic attraction between the particles, allowing the particles to remain dispersed and preventing precipitation and condensation.

Ek olarak, the pigment dispersant can form a bilayer structure, and the polar end of the outer layer has a strong affinity with water. This increases the wetting degree of the solid particles to the water, generating electrostatic repulsion that pushes the particles away from each other. This ensures the uniformity and stability of the dispersed system.

Common pigment dispersant

There are many kinds of pigment dispersants, including methyl cellulose, silica sol, polyacrylic acid, sodium polyacrylate and trisodium phosphate. Polyethylene glycol dispersants are also widely used in water-based coatings, with good water solubility, which helps to reduce surface tension and improve wettability. These dispersants not only adsorb on the surface of the pigment, producing a steric effect, but also prevent the contact between the pigment particles, prevent harmful flocculation, and keep the dispersion system stable.

Pigment dağıtıcıların çalışma prensibi ve kaplama endüstrisindeki uygulamaları

Pigment dağıtıcıların çalışma prensibi ve kaplama endüstrisindeki uygulamaları

Application of pigment dispersant
Genel olarak, pigment dispersants play an indispensable role in the coating industry. By improving the dispersion of the pigment, the pigment dispersant ensures the performance and quality of the paint. From construction to automotive painting to industrial coatings, coatings in different fields are inseparable from these seemingly tiny but vital dispersants. Their application allows the pigments to function better, ensuring the uniformity and stability of the coating, giving a high quality appearance and long-lasting performance to a variety of coatings.

Gelecekte, with the continuous development of science and technology and the pursuit of environmental performance, the research and innovation of pigment dispersants will continue to promote the advancement of the coating industry. As a master of balance, pigment dispersants will continue to provide more options and solutions for the paint industry, helping the industry to move to a higher level of development.