摘要：Paint uneven? One trick to make pigments behave! Why do inorganic pigments and fillers in paint always love to clump together? It

Paint uneven? One trick to make pigments behave! Why do inorganic pigments and fillers in paint always love to clump together? It turns out that their dispersion goes through three stages: wetting, disaggregation, and stabilization.

These hydrophilic inorganic particles often adsorb water on their surfaces, making it difficult for the non-polar hydrophobic resin base to wet them. But after surface modification with a coupling agent, a magical change occurs - the coupling agent replaces the water molecules on the particle surface, forming a hydrophobic oily protective layer with R groups arranged outward.

The base resin molecules then insert into the particle gaps, thoroughly dispersing them and preventing precipitation and caking. After treatment with a coupling agent, the pigment fillers not only significantly reduce the viscosity of the paint, eliminate flocculation, but also maintain fluidity while increasing the amount added. More importantly, the more evenly the particles are dispersed, the stronger the final paint film's hiding power, color expression, and tinting strength will be!

来源：躺平闲聊天