Water-soluble paint defoamer: the key to improving paint performance

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Water-soluble paint defoamer: the key to improving paint performance
By : Zilibon Chemical

2025/4/11
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In the production and application of water-soluble paint, foam problems often plague paint manufacturers and users. Foam not only affects the appearance and quality of the paint, but also reduces the production efficiency and performance of the paint. Therefore, the application of water-soluble paint defoamers is particularly important.

The generation of water-soluble paint foam is mainly related to the composition and production process of the paint. Solvents, resins, pigments and other components in the paint are easily mixed with air during stirring, mixing, grinding, etc., thus forming foam. In addition, factors such as temperature, pressure, and stirring speed during the production of the paint will also affect the generation of foam.

The working principle of water-soluble paint defoamers is mainly to reduce the strength of the foam film by reducing the surface tension of the liquid, thereby causing the foam to rupture. The defoamer molecules can form a monomolecular film on the surface of the foam film, which will destroy the stability of the foam film, causing the foam film to become thinner and rupture.

In the production and application of water-soluble coatings, there are two main methods for applying defoamers: one is direct addition, that is, adding the defoamer directly to the coating, and making it evenly dispersed by stirring, etc., so as to achieve the purpose of defoaming; the other is indirect addition, that is, adding the defoamer to specific parts of the coating production equipment, such as agitators, grinders, etc., to achieve defoaming through full contact with the coating.

In short, water-soluble coating defoamers play an important role in the production and application of water-soluble coatings. By selecting appropriate defoamers and application methods, the foam in water-soluble coatings can be effectively eliminated, the performance and quality of the coating can be improved, and the production cost and environmental pollution can be reduced.
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