In the rapidly developing coatings industry, water-based coatings have gradually become the mainstream choice in the market due to their environmental friendliness and low VOC (volatile organic compound) emissions. However, waterborne coatings often face a difficult problem in the production and application process - foam problem. Foam not only affects the construction performance of the coating, but also may cause surface defects of the coating, such as fisheye, pinhole, etc., which seriously affects the final quality and aesthetics of the coating. Therefore, water-based paint defoamers have emerged as a key additive to solve this problem.

Defoamer for water-based coatings is a chemical additive specially designed to inhibit and eliminate foam in water-based systems. By destroying the stability of foam, the bubbles break up quickly and disperse back into the liquid, thus maintaining the uniformity and fluidity of the paint.

Defoamer molecules can quickly diffuse to the surface of foam, reducing its surface tension, making the foam wall thinner and easier to break. part

Defoamer molecules can penetrate into the foam wall, destroy the elasticity of foam film, and accelerate its rupture process. Defoamer can form new and more unstable film by replacing water or other solvents in foam film to promote the elimination of foam. Some defoamers can also increase the viscosity of the paint and slow down the generation of foam. These mechanisms work together to ensure the effective control of foam in the production, storage, transportation and construction of water-based coatings.