In addition to the rational use of dispersants, the dispersion of pigments, pH, cationic electrolyte and dispersion time, strength, humidity, etc. also have a great influence on the dispersion of pigments.

A. The influence of dispersant on pigment dispersibility: For some pigment particles, it is difficult to use a single dispersant to meet the dispersion requirements. If two dispersants are used in combination, the dispersion effect will be significantly improved, and the amount of dispersant has not increased. This situation is common in the dispersion of pigments, not only can improve the dispersion effect, but also increase the stability. However, it should be noted that when mixing pigments dispersed by different dispersants, care must be taken to avoid flocculation and sudden increase in viscosity.

B. The influence of PH value on pigment dispersion: The pH value is also an important factor affecting pigment dispersion. When the pigment is dispersed, there is a suitable PH value range. Beyond this range, the rheology of the pigment will change, and the viscosity will change. increase.

C. The influence of cationic electrolyte on pigment dispersibility: The influence of electrolyte on pigment dispersibility is mainly realized by changing the electric double layer structure of pigment particles. It can weaken the counter ion layer and move it to the particle surface, causing the particles to interact with each other. Close; it can also compress the electronic layer, reduce the potential surface charge, and cause the flocculation of pigment particles.

D. The influence of time, stirring intensity and humidity on the dispersibility of pigments: Dispersion time and stirring intensity are also an important factor affecting the dispersion effect of pigments, mainly by supplementing energy, changing the surface energy of the pigment particles and making them fully wetted. Dispersion effect. Generally speaking, with the increase of speed and the passage of time, the particles become finer and the dispersion effect is better (the coarse particles are reduced), but at the same time it may increase the bubbles and increase the energy consumption, so it should be considered. It depends on the dispersion effect.