DOWSIL 7305 is a high-efficiency water-based silicone defoamer with 5% active content (polydimethylsiloxane), engineered for harsh industrial environments. It maintains stable defoaming performance in pH 2–12 and temperatures ≤80°C, leveraging nano-scale dispersion technology to achieve rapid bubble collapse (≤15 sec) and long-term suppression (24+ hours). With dynamic surface tension as low as 25.2 mN/m, it boosts process efficiency in wastewater treatment and paper pulping systems. FDA-compliant (21 CFR 176.210), it suits eco-sensitive uses like food processing wastewater, while being compatible with anionic/nonionic surfactants to reduce foam-caused equipment corrosion and energy loss.
Broad-Spectrum Efficiency: Eliminates >95% of micron-level bubbles, especially effective in high-solids systems (e.g., sludge dewatering).
Extreme Condition Adaptability: Active in strong acid/alkali (pH 2–12) and high-salinity wastewater; resists transient thermal shock (≤80°C).
Low-Dosage Persistency: Recommended 50–200 ppm usage cuts operational costs by reducing frequent replenishment.
Eco-Compliance: APEO-free, VOC <50 g/L; certified under EU REACH and China GB 24408.
Wastewater Treatment: Suppresses biological foam in activated sludge and MBR systems to improve aeration efficiency.
Paper Industry: Reduces flotation and deposits in pulp bleaching, enhancing sheet smoothness.
Food Processing: Controls foam in fermenters and cleaning lines, meeting indirect food contact standards.
Chemical Production: Prevents bubble defects in water-based coatings/adhesives production.
Type | Polyether-modified silicone defoamer |
Appearance | Milky liquid |
Active Content | 57% |
Viscosity (25°C) | 2000 mPa·s |
Dynamic Surface Tension | 25.2 dyn/cm (0.5% solution) |
pH Value | 7.4 |
Flash Point | >101℃ |
Recommended Dosage | 0.05%-0.5% (on total formulation) |
Packaging | 25kg/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