Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

DOWSIL SM 5513 Defoamer

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.

Product Information of DOWSIL SM 5513 Defoamer

  1. 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.

  2. 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.

  3. 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.

Areas of Application of DOWSIL SM 5513 Defoamer

  1. 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.

  2. 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.

  3. 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.

Specifications Of DOWSIL SM 5513 Defoamer

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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