Dispersant is a surfactant with two opposite properties, lipophilicity and hydrophilicity, in the molecule. It can evenly disperse the solid and liquid particles of inorganic and organic pigments that are difficult to dissolve in liquids, and at the same time prevent the sedimentation and coagulation of particles, forming the amphiphilic reagent required for a stable suspension.

Dispersant is a coating additive that can improve and improve the dispersibility of solid or liquid materials. It is a polymer surfactant with high anti-flocculation ability. Among the components of coatings, there are film-forming substances, solvents (water), pigments and fillers, and additives. Among them, coating dispersants are very important components of coating products, and play a very critical role in improving and improving the performance of coatings and coatings.

Coating dispersants are light yellow transparent liquids, slightly acidic, and can form latex in water. They are used to disperse pigments and fillers in oil black, paints, and coatings, shorten grinding time, prevent the coagulation and coarsening of pigment and filler particles, and have an anti-settling effect.

The characteristics of coating dispersants are as follows:

  1. It can ionize into charged groups of various structures to improve the wettability of pigments, prevent the pigments and fillers in the coating from sinking to the bottom and agglomerating, and facilitate redispersion; coating dispersants have low acidity and are particularly effective for the mixed system of pigments and fillers in complex color coatings;
  2. Coating dispersants are effective in dispersing carbon black, can eliminate the white mist on the surface of black paint, and can eliminate the floating color and blooming caused by the color matching of carbon black and titanium dioxide;
  3. In water-based coatings, it can effectively eliminate the swelling of pigments and fillers, reduce the viscosity of the system, and increase the number of fillers in the primer;
  4. Coating dispersants have a certain anti-settling effect and can be used in combination with organic bentonite to prepare pre-gels with excellent performance.

High-quality coating dispersants should have the following conditions:

  1. Good dispersing performance to prevent the aggregation of filler particles;
  2. Appropriate compatibility with resins and fillers; good thermal stability;
  3. Good fluidity during molding; No color drift;
  4. No impact on the performance of the product; Non-toxic and inexpensive.

Application scope of coating dispersants: Used in the dispersion of pigments and fillers in oil black, paint, and coatings, shortening the grinding time, preventing the aggregation and coarsening of pigment and filler particles, and also having an anti-settling effect.