Thus, it is also harder to defoam these formulations and microfoam problems (trapped air bubbles) are more acute.
Air that becomes entrained during the preparation of the coating needs time to be defoamed prior to the coating's use.
In contrast, low viscosity inks are easier to defoam
but more susceptible to defect formation; therefore, they require weaker but more compatible defoamers.
To effectively reduce dynamic surface tension and provide a wide compounding latitude for formulators looking for a high-performance surfactant that can both defoam
and act as a wetting agent, EnviroGem ADO1 surfactant is the solution.
Lower viscosity systems are generally easier to defoam
as the air bubbles can rise more easily and the coating has greater flow.
Evonik has found ways to overcome certain physical and chemical limiting factors and now offers multifunctional additives that both wet and defoam
at the same time or are energy curable additives that provide both slip and flow properties.
This explains why conventional defoamers can only defoam
macrofoam, foam at the surface of a liquid where it is relatively static.