ShinEtsu KS-538 is a self-emulsifying silicone defoaming agent supplied as a stable silicone emulsion for liquid processing systems. In use, it disperses quickly into foaming media and integrates smoothly without special pre-dilution, allowing operators to achieve consistent foam control with minimal adjustment. This product features easy metering, rapid dispersion, and stable and reliable performance during continuous processing, supporting predictable operation in industrial liquid systems.

• Low Surface Tension - KS-538 exhibits very low surface tension, enabling rapid disruption of foam lamellae. Silicone-based defoamers of this type typically reduce surface tension to below 22 mN per meter, allowing effective foam collapse at low addition levels. This property supports fast foam breakage even in highly aerated systems.

  
  

• Long-Term Control - KS-538 provides sustained foam suppression after initial defoaming. With a non-volatile content of approximately 65 percent, active silicone components remain effective over extended processing periods. This reduces the need for repeated dosing and helps maintain stable foam control during long production runs.

  
  

• Thermal Resistance - KS-538 maintains performance under elevated temperature conditions. With a flash point above 250 °C, the formulation remains stable during high-temperature processing stages. This thermal stability supports reliable defoaming in heated systems without loss of effectiveness.

  
  

• Chemical Stability - KS-538 shows resistance to alkaline and chemically aggressive environments. Performance remains stable in systems exposed to strong alkalis and process chemicals, with minimal degradation observed during prolonged exposure. This stability supports consistent defoaming performance in demanding industrial formulations.

  
  

• Addition Stability - KS-538 demonstrates excellent internal stability when blended into formulations. The silicone emulsion remains uniformly dispersed without separation or sedimentation over extended storage periods. This stability supports consistent dosing accuracy and reliable performance in complex liquid systems.

• Paints Processing - KS-538 is used to control foam during paint manufacturing and mixing stages. Low addition levels help suppress air entrainment during high-shear dispersion. This supports smoother film formation and reduced surface defects in finished coatings.

  
  

• Coatings Systems - In industrial coatings production, KS-538 helps manage foam generated during formulation and application. Stable defoaming performance supports uniform coating thickness and reduced pinhole formation. This contributes to improved surface quality in coated products.

  
  

• Inks Production - KS-538 is applied in ink manufacturing to control foam during mixing and circulation. Its fast dispersion supports immediate foam reduction without affecting ink flow properties. This helps maintain consistent print quality during high-speed printing operations.

  
  

• Printing Processes - In printing systems, KS-538 supports continuous foam control in circulating liquids. Stable performance helps prevent air-related defects during long print runs. This contributes to consistent process stability and reduced downtime caused by foam buildup.