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

Dowsil 163 Defoamer

DOWSIL 163 is a high-performance defoamer from Dow, specifically engineered for the coatings and inks industries.It leverages unique silicone chemistry to deliver rapid bubble-breaking action and long-term foam suppression, making it versatile across waterborne, solvent-based, and UV-curable formulations. Stable in systems with a pH range of 5–10, it reduces surface tension by 25–30 mN/m, effectively eliminating application defects (e.g., pinholes, orange peel) while enhancing key product properties—including a 15% gloss boost and improved leveling. With a low recommended dosage of 0.1–0.5% and FDA compliance (per 21 CFR 175.300), it optimizes cost efficiency for eco-sensitive applications like food packaging printing. Additionally, its eco-friendly credentials (APEO-free, VOC<50g/L) and compliance with global standards (EU REACH, China GB 24408) make it suitable for strict regulatory environments.

Product Information of Dowsil 163 Defoamer

  1. Broad-Spectrum Defoaming Efficacy: Eliminates micron-sized bubbles (a common cause of surface defects) and inhibits foam regeneration, ensuring long-lasting foam control throughout production, storage, and application.

  2. Exceptional System Compatibility: Works seamlessly with diverse resin systems, including acrylic, polyurethane (PU), epoxy, and more—avoiding issues like sedimentation, phase separation, or reduced coating/ink performance.

  3. Thermal & Shear Stability: Maintains stability at temperatures up to 150°C and under high-shear conditions (e.g., high-speed grinding, printing roll shear), with no negative impact on the viscosity of target formulations.

Areas of Application of Dowsil 163 Defoamer

  1. Industrial Coatings: Auto OEM/coil coatings (reduces orange peel and pinholes).

  2. Printing Inks: Flexo/gravure inks (improves print uniformity, speeds up drying).

  3. Wood Coatings: Waterborne UV primers (enhances clarity, boosts sanding efficiency).

  4. Architectural Coatings: Elastic facades (improves dirt resistance and rain-wash performance).

  5. Eco-Sensitive Packaging: Food packaging printing inks (FDA 21 CFR 175.300 compliant).

Specifications Of Dowsil 163 Defoamer

Type
Silicone defoamer
Appearance
Milky translucent liquid
Active Content
Polyether-modified polysiloxane (100%)
Density (25°C)
0.95-1.05 g/cm³
Viscosity (25°C)
200-500 mPa·s
Flash Point
≥100℃
Recommended Dosage
0.1-0.5% (on total formulation)
Packaging
25kg/drum or 200kg/IBC


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