In the production process of paints, materials such as emulsions, dispersants, thickeners, leveling agents, wetting agents, emulsifiers, etc. are actively used, causing the paint to be prone to foaming. Moreover, these bubbles have a stable and long-lasting effect. In particular, emulsifiers are added to water-based latex paints, and the use of these emulsifiers can greatly reduce the surface tension of the emulsion system, causing bubble problems. At this time, a certain amount of defoamer is needed to improve the situation.

The hazards of air bubbles in water-based coatings:

1. The air in the foam will hinder the dispersion of pigments or fillers;

2. The generated bubbles will lead to under-utilization of the equipment and affect the production quality;

3. Foaming will also affect the mixing speed, prolonging the mixing time;

4. Bubbles will prevent the pigments and fillers from being fully wetted;

5. It will also cause problems such as underfilling and uneven weight in continuous filling production lines;

6. Foaming will cause water-based coatings to develop problems such as pits and holes in the coating film during use.

What are the characteristics of a good defoamer?

1. Eliminate or inhibit foam:

Defoamers can cause bubbles to burst, thereby effectively reducing foam formation.

2. Improve paint fluidity:

Defoamers can significantly improve the fluidity of water-based paints, making them smoother to spray and brush. This not only prevents uneven spraying caused by foam, but also improves construction efficiency and ensures the quality of the coating.

3. Enhance paint adhesion:

The use of defoamers can enhance the adhesion of the paint, reduce peeling and flaking of the coating, and thus prolong the service life of the coating.

4. Improve the appearance of the paint:

By reducing the generation of foam, defoamers can prevent defects such as bubbles and holes on the surface of the coating, ensuring the smoothness and evenness of the coating.

5. Improve the drying speed of the paint:

The use of defoamers can promote the bursting of bubbles and reduce the interference of bubbles in the drying process, thereby increasing the drying speed of the paint and production efficiency.

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