BYK-1789 is a solvent-free, silicone-based defoamer for water-based thick films, quick-drying coatings, and adhesives. It improves defoaming and effectively prevents microfoam.
BYK-1789 is a very effective defoamer for water-based paints that is solvent-free. It particularly removes microfoam in thick film systems. BYK-1789 is also effective in fast-drying water-based systems. Additionally, it improves wetting of the paint on the substrate. Therefore, it is especially recommended for DTM (direct-to-metal) coatings. BYK-1789 has been specially developed for use in water-based epoxy systems. This additive has shear stability and is particularly suitable for airless spray painting. At the same time, it shows good compatibility and significant effectiveness in other systems, such as air-drying acrylates. Even after long-term storage of the paint, it retains its properties. With excellent defoaming and wetting properties, it can be considered the first choice for challenging water-based systems.
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basic information
Features • 100% active ingredient, solvent-free • Ideal for demanding systems such as: - Airless applications (HVLP and air mix) - High build systems - Fast drying systems - Direct-to-metal (DTM) coatings • Effective defoaming and internal air release • Very good compatibility in a wide range of coating systems • Optimized substrate wetting • Improved corrosion resistance General Properties • Active ingredient: 100% • Density (20°C): 1.01 g/ml • Flash point: > 120°C
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Applications/Examples of results
Applicable Fields • Marine and anti-corrosion coatings • General industrial coatings • Wood and furniture coatings • Architectural coatings • Floor coatings • Adhesives and sealants Recommended Addition Amount As an additive, 0.5-1.5% of the total formulation. The above recommended addition amount should be used as an initial value. The optimal addition amount should be determined through actual testing. Addition Method: BYK-1789 can be added during the mill base and let-down stages. To ensure that the defoamer oil droplets are sufficiently fine and well-dispersed, and to avoid the occurrence of beading, please apply sufficiently high shear force during the addition and mixing process.
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BYK Japan KK is engaged in the import, wholesale, and technical service of paints, additives, and measuring instruments. As a leading supplier of functional additives and testing equipment across various application fields, we provide solutions to assist you in product development and solving challenges. Please feel free to contact us if you have any inquiries.