Лако-красочные материалы — производство

An effective defoamer must counteract the foam stabilization mechanism. Defoamers are low surface-tension liquids that have a controlled insolubility or incompatibility in the system to be defo — amed, along with positive penetration and a positive spreading coefficient. When they enter the foam lamella and spread across the interface, the stabilizing surfactant molecules are displaced, resulting in lower cohesive strength of the lamella, which leads to rupture and collapse of the foam. The effect of such liquid defoamers can be boosted by adding finely dispersed hydrophobic particles, which help in destabilization by reducing the cohesive forces.