Analysis of Foam Issues in Waterborne Coatings and Effective Solutions | Chemi Tech Expertise

Waterborne coatings have become the market mainstream due to their environmental benefits. However, foam issues frequently occur during production, filling, and application, directly affecting film appearance and performance. If not eliminated promptly, these foams can lead to defects like craters and fisheyes, reducing product yield and increasing production costs.

Confronting this common pain point, Chemi Tech leverages in-depth research in surface chemistry to develop a series of high-efficiency defoamers for waterborne coatings. Our solution goes beyond simply adding an additive; it offers a systematic foam control strategy.

First, accurately identifying the foam source is crucial. Foam may originate from high-speed agitation during production or from the stabilizing effect of surfactants in the formulation. The Chemi Tech technical team recommends starting with a detailed on-site diagnosis to pinpoint the specific stage and primary cause of foam generation.

Second, select the defoamer type precisely. We offer various products, including foam-preventing and foam-breaking types. For continuously generated foam during production, products with outstanding foam inhibition are chosen; for existing foam during application, fast foam-breaking products are selected. Selection must balance defoaming efficiency with system compatibility to avoid affecting coating gloss or causing surface defects.

The third step is scientific addition and evaluation. Defoamers are typically added during the grinding stage to ensure sufficient dispersion. After addition, rigorous testing is essential, including thermal storage stability, freeze-thaw stability, and application simulation tests, to ensure the defoaming effect is durable and stable.

We once assisted a coating manufacturer in East China in solving foam problems in their high-end interior wall paint. The client experienced stubborn foam on both the filling line and during roller application. After on-site assessment, Chemi Tech recommended a specific defoamer model and adjusted the addition process. Following the adjustment, the filling line efficiency increased by 15%, and the applied film became smooth and even, leading to a significant decrease in customer complaints. This demonstrates the practical value of a targeted solution.

Chemi Tech believes that solving foam problems requires combining professional products with scientific methodology. We are committed to providing clients not only with defoamers but also reliable technical support and process optimization advice, working together to enhance the final performance of waterborne coatings.