Divided into organic and inorganic 2 categories.
Inorganic matting agent is mainly silica matting agent, its chemical composition is ultra-fine silica, divided into 2 types of surface treated with organic substances and untreated.
Pigment dispersion is an important process in the production of coatings, inks, plastic processing, and daily cosmetics.
Pigment dispersion refers to the wetting, crushing and dispersing of pigment particles into the vehicle under the action of external force in order to obtain a stable suspension. In the production of coatings and inks, pigment dispersion is related to the properties of pigments, resins, and solvents and their interactions with each other.
Pigment dispersion includes three inseparable and closely linked processes: wetting, crushing, and stabilizing. Wetting is actually the replacement process of the pigment surface, which refers to the use of resins or surfactants to replace adsorbents, air, water, etc. on the pigment surface to enhance the compatibility of the pigment and the vehicle. Crushing refers to the use of mechanical force to crush the agglomerated secondary agglomerates to fine particles required by the process to form a suspended dispersion.
Stability means that the suspension dispersion made can be in a stable state without any external force, and amide wax emulsion no agglomeration or sedimentation will occur.
There are a variety of different forces in the dispersion system, the reasons for which are different. The stability of the dispersion system is determined by the combined force of various forces.
Regarding the stabilization mechanism of the pigment dispersion, there are mainly charge repulsion theory and steric hindrance effect.
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