Dispersant

Surfactant. Surfactants are composed of lipophilic and hydrophilic groups and are amphipathic molecules, including long-chain fatty acids, cetyltrimethylammonium bromide (CTAB), etc. The main function of this type of dispersant is the steric hindrance effect. The hydrophilic group is adsorbed on the surface of the powder and the hydrophobic chain extends into the solvent, which has a good effect on improving the rheology of the slurry. CTAB and dioctadecyldimethylammonium chloride (DDAC) can significantly improve the dispersion of bentonite in water.

Dispersant is a surfactant that has two opposite properties: lipophilic and hydrophilic in the molecule. It can be used to evenly disperse inorganic and organic solid particles that are difficult to dissolve in liquids. It can also be used to prevent the settling and agglomeration of solid particles. , forming a stable suspension. As a common chemical additive, dispersants have various functions such as dispersion, stabilization, and wetting. They are widely used in coatings, printing inks, medicine, cosmetics, agriculture, textiles, food and other industries.

Dispersant is a common chemical additive that is widely used in chemicals in various fields and has various functions such as dispersion, stabilization, and wetting. It can disperse solid particles evenly in the liquid and avoid the aggregation and precipitation of particles in the liquid, thus improving the quality and stability of the product. The application range of dispersants is very wide. Let’s take a look at the functions and uses of dispersants.

Dispersant is one of the commonly used surfactants in many industries today, especially in the pigment industry, where the application of dispersants is particularly important. Dispersants can improve the overall gloss of the pigment surface, prevent color floating, reduce viscosity, increase pigment loading, reduce flocculation, increase color development and many other functions.

Powdered disperse dyes have a higher dispersant content, accounting for about 60% of the total dye, and are mostly anionic; while liquid disperse dyes have a lower dispersant content, accounting for about 20% of the total dye. Available dispersant types There are many, including nonionic, anionic and hyperdispersants. Compared with powdered disperse dyes, the dispersant content of liquid disperse dyes is greatly reduced. Although it brings advantages to printing and dyeing such as increased dye uptake and reduced pollutants in printing and dyeing wastewater, it will also reduce dye grinding efficiency and liquid dye stability. Therefore, choosing the appropriate dispersant is critical for the preparation of liquid disperse dyes.

The main function is to disperse the particles that need to be dispersed in the water-based paint on the surface so that they have better stability. Gloss-improving dispersants can improve the gloss of water-based paints, improve the flatness of the surface of water-based paints, and maintain a certain level of stability. In this way, when sunlight hits the wall, the water-based paints will emit good gloss. Increase color transparency and saturation

The main difference between dispersants and surfactants is that dispersants improve the separation of particles in a suspension, while surfactants are substances that reduce the surface tension between two phases of a substance. Dispersants are a form of surfactant. But all surfactants are not dispersants. In addition to acting as dispersants, surfactants can also act as detergents, wetting agents, emulsifiers, and foaming agents. Usually, they are organic compounds.

Wetting and dispersing agents are actually a type of dispersant. They have a wetting effect, and this wetting effect mainly acts on the pigment particles, reducing the surface energy of the pigment particles and reducing the intermolecular force. In this …

The dispersion process of pigments in paint is generally measured using a his method determines the coarsest pigment particles present in the pigment dispersion. Different coating products have different fineness indicators that they should achieve.