Читать книгу Additives for Water-borne Coatings - Wernfried Heilen - Страница 86

Defoamer concentrates with 100 % active content or strongly hydrophobic defoamers require high shear forces for incorporation to generate defoamer droplets of sufficiently fine particle size. If it is not possible to apply high shear forces it is better to use more compatible pre-emulsified defoamer emulsions or solutions of defoamer actives in solvents.