In the production and application of waterborne coatings, foam has always been one of the key factors affecting the performance of coatings. As a chemical additive specially designed to solve the foam problem, the defoamer for water-based coatings plays an irreplaceable role in improving the performance of coatings. This article will explore in detail how water-based coating defoamers can improve coating performance from the following aspects:

Control the production of foam. During the mixing, transportation and construction of water-based coatings, due to the reduction of surface tension and the mixing of air, it is very easy to produce a large number of foam. These foam will not only waste paint raw materials, but also affect the stability and uniformity of the paint. The defoamer for water-based coatings can rapidly penetrate into the foam system, reduce the stability of foam, effectively control the production of foam, and ensure the stability of coating quality.

Treatment of existing foam, for the generated foam, water-based paint defoamer also performs well. It can quickly diffuse to the surface of foam, reduce the surface tension of foam, and make bubbles burst quickly and disperse back into the liquid. This process not only eliminates the interference of foam on the coating construction, but also ensures the uniformity and fluidity of the coating, laying a good foundation for the subsequent coating process.

To improve the leveling adhesion, the presence of foam will seriously affect the leveling of the coating, resulting in uneven coating surface. The defoamer for water-based coating can make the coating spread more evenly on the surface of the substrate and improve the leveling property of the coating by eliminating foam. Meanwhile, defoamers can also improve the wetting and permeability of coatings, enhance the adhesion between coatings and substrates, and improve the adhesion and durability of coatings.

To enhance the film performance, the defoamer of water-based coatings can not only eliminate foam, but also improve the film forming performance of coatings to a certain extent. It can promote the uniform dispersion of pigments and fillers in coatings, reduce particle agglomeration, and improve the density and smoothness of paint films. In addition, defoamers can enhance the hardness and wear resistance of the paint film, making the coating more robust and durable.

To prevent paint sedimentation, coatings that have been left to stand for a long time are prone to sedimentation, especially coatings containing a large amount of pigments and fillers, which are more serious. Water based coating defoamers can reduce the surface tension of coatings, slow down the settling speed of pigments and fillers, and prevent coating precipitation. This is not only beneficial for the storage and transportation of coatings, but also maintains the stability and consistency of coatings during the construction process.

To improve the aesthetics, foam problems will directly affect the appearance quality of the coating, such as fish eye, pinhole and other defects. The defoamer for water-based coating can completely eliminate foam, avoid these defects, and make the coating surface more smooth, flat and beautiful. This is particularly important for painting projects that require high visual effects, such as automotive paint, furniture paint, etc.

Economically efficient, the use of water-based coating defoamers not only improves the performance and quality of coatings, but also brings significant economic benefits. First of all, by controlling the production of foam and treating the existing foam, the waste and rework rate of paint are reduced, and the production cost is reduced. Secondly, improving the leveling and adhesion of the coating has increased the coverage and durability of the coating, prolonging its service life. Finally, the use of defoamers can improve coating efficiency, shorten construction periods, and create more value for enterprises.

Environmentally friendly and safe, water-based paint defoamers are mostly environmentally friendly products with characteristics such as low VOC, non-toxic and harmless, and good biodegradability. It will not cause pollution to the environment or harm human health during use. At the same time, defoamers also have good stability and compatibility, and will not have adverse reactions with other components in the coating, ensuring the overall performance and safety of the coating.

In summary, water-based coating defoamers play an important role in improving coating performance. It can not only effectively control the generation of foam and deal with the existing foam, but also improve the leveling, adhesion, film performance and aesthetics of the paint, while achieving the goal of economic efficiency and environmental safety. With the continuous expansion of the water-based coating market and the increasingly strict environmental regulations, the application prospects of water-based coating defoamers will be even broader.