In the field of architectural decoration, water-based architectural coatings have become the darling of the market with its many advantages such as environmental protection and safety. However, in the production and use of water-based architectural coatings, the foam problem is often a headache. At this time, the water-based architectural coating defoamer is like a silent "guard" and plays a vital role.
The reason why water-based architectural coating defoamers can effectively eliminate foam is due to their unique working principle. Generally speaking, defoamers have low surface tension and can quickly penetrate into the surface of the foam film. When the defoamer contacts the foam, it spreads on the foam surface to form a thin liquid film.
As the defoamer molecules continue to penetrate into the foam, the foam wall gradually becomes thinner and eventually breaks and disappears. At the same time, some defoamers also have the function of inhibiting the re-generation of foam, by changing the interfacial properties of the coating system and preventing the formation of new foam nuclei, thereby achieving a continuous defoaming effect.
When choosing a defoamer for water-based architectural coatings, multiple factors need to be considered comprehensively. First of all, we should choose according to the specific formula and performance requirements of the coating. Different types of water-based architectural coatings, such as latex paint, real stone paint, etc., may have different requirements for defoamers.
Although the defoamer of water-based architectural coatings may seem inconspicuous, it plays an indispensable role in the production and application of water-based architectural coatings. By deeply understanding the foam problem, the working principle, type and selection method of the defoamer, we can better play the role of the defoamer, ensure that the water-based architectural coating is presented in a perfect state in the architectural decoration project, and create a beautiful and durable architectural space for us.