Dispersant (Dispersant) is a kind of interfacial active agent which has two opposite properties of oleophilic and hydrophilic in the molecule. It can uniformly disperse the solid and liquid particles of inorganic and organic pigments that are difficult to dissolve in liquid, and also prevent the sedimentation and condensation of particles to form amphiphilic reagents required for stable suspension.

The function of the dispersant is to use the wetting dispersant to reduce the time and energy required to complete the dispersion process, stabilize the dispersed pigment dispersion, modify the surface properties of the pigment particles, and adjust the movement of the pigment particles [2]. It is reflected in the following aspects:

1, improve the luster, increase the leveling effect luster actually depends on the paint surface of the light scattering (that is, a certain degree of flatness can be. Of course, it is necessary to determine whether the testing instrument is smooth enough, not only considering the number of primary particles, shape, and consider their combination), when the particle size is less than 1/2 of the incident light (this value is uncertain), it is reflected as refracted light, and the gloss will not be improved, and the covering power will not increase depending on scattering to provide the main covering power (except carbon black mainly by absorbing light). Organic paint forgot). Note: The incident light refers to the range of visible light leveling can not be said; However, note that the reduction of the primary number of particles is to reduce its structural viscosity, but the increase of the surface will reduce the number of free resins, whether there is a balance point is not good, but the general powder coating leveling is not the finer the better.

2, prevent floating color hair flower.

3, improve the coloring force Note that the coloring force in the automatic color system is not the higher the better.

4, reduce viscosity, increase pigment load.

5, reducing flocculation is such, but the finer the surface energy of the particles, the higher the adsorption strength of the dispersant is needed, but the adsorption strength of the dispersant is too high may cause adverse effects on the film performance.

6, increase the storage stability in fact, the reason is similar to the above, once the stability of the dispersant is not enough, but the storage stability is worse (of course, from your picture is no problem).

7, increase the color display, increase the color saturation, increase the transparency (organic pigments) or hiding power (inorganic pigments).

TEGO Dispers wetting dispersants help to moisten and stabilize pigments, prevent flashedness and pigment settling, maintain stable pigment covering power and color strength during storage, while ensuring maximum color gain and minimum grinding steps. Because these additives reduce viscosity and can be dispersed to the highest pigment concentration, the production of coatings and pigment concentrates is more cost-effective. An excellent dispersant should meet the following requirements: 1, good dispersion performance, prevent the packing particles from gathering together; 2. Suitable compatibility with resin and filler; Good thermal stability; 3. Good fluidity during molding processing; Does not cause color drift; 4, does not affect the performance of the product; Non-toxic and inexpensive. The amount of dispersant is generally 5% of the mass of the masterbatch.