DOWSIL SM 5513 is a siloxane-silica composite defoamer engineered for demanding industrial scenarios. It exists as a milky liquid with a viscosity range of 500-1,200 mPa·s, maintaining stable defoaming activity across pH 3-12 and at temperatures up to 80°C. With a dynamic surface tension as low as 25 dyn/cm, it collapses micron-level foam in just 3 minutes and provides over 6 hours of continuous foam suppression. ISO 9001 certified, it reduces mineral oil defoamer usage by 15% in coatings and printing inks, while simultaneously boosting overall production efficiency.
Ultra-Fast Defoaming: Nano-sized siloxane particles break down foam by lowering surface tension, making it highly suitable for high-shear industrial processes (e.g., high-speed coating dispersion, ink mixing) where rapid foam control is critical.
Harsh Environment Resistance: Maintains consistent performance in extreme conditions—tolerating pH 3-12 (covering mild acids to strong alkalis) and 80°C thermal stress without degradation or loss of defoaming ability.
Wide System Compatibility: Seamlessly integrates with acrylic and polyurethane systems, avoiding incompatibility issues (such as pinholes, craters, or reduced gloss) that often cause coating defects.
Coatings: Controls foam in waterborne wood coatings; when dosed at 0.1%, it increases coating flow by 20%, ensuring smoother, more uniform film formation on wood surfaces.
Printing Inks: Eliminates foam in UV ink printing processes, preventing print defects like bubbles or uneven color. It complies with China’s GB 9685-2016 standard for food contact materials, suitable for inks used in food packaging.
Industrial Cleaners: Enhances degreasing efficiency in spray cleaning systems, with a recommended dosage of 0.05%-0.2%, ensuring foam does not interfere with spray coverage or cleaning performance.
Type | Siloxane-silica defoamer emulsion |
Appearance | Milky liquid |
Active Content | Polydimethylsiloxane + silica |
Dynamic Viscosity | 500-1,200 mPa·s |
pH Range | 3-12 |
Surface Tension (0.5% solution) | 25 dyn/cm |
Recommended Dosage | 0.05%-0.3% (on total system) |
Food Certifications | FDA 21 CFR 175.300, GB 9685-2016 |
Packaging | 20kg/drum or 200kg/IBC |
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China