DOW DOWSIL FS 91 is a high-performance siloxane defoamer for textile dyeing and industrial water treatment, made with polysiloxane boosted by hydrophobic silica. It stays active at pH 2-12 and ≤100°C, has dynamic surface tension down to 22 dyn/cm, collapses micron foam fast (6+ hours suppression), meets FDA 21 CFR 176.210 for food-grade uses. Blended with mineral oil defoamers, it cuts usage by 20% to boost textile and water treatment efficiency.
Fast Foam Breakdown: Nano siloxane particles destroy foam in 3 minutes, perfect for high-shear dyeing and water treatment processes.
Extreme Condition Resistance: Withstands pH 2-12, high salinity, and 100°C heat without performance degradation.
Extended Shelf Life: Remains stable for 360 days at -20°C to 50°C, staying homogeneous after dilution.
Eco-Friendly Certification: APEO-free, VOC <50g/L, and certified under EU REACH and China GB 24408.
Cost-Saving Performance: 0.1%-1% dosage reduces costs by 30% compared to traditional defoamers.
Textile Dyeing: Manages foam in jet dyeing machines to minimize dye waste (0.2%-0.8% dosage).
Industrial Water Treatment: Lessens foam in high-COD aeration tanks, lowering the carryover of sludge.
Food Processing: FDA-compliant for foam control in fermenters and cleaning lines, with a maximum 0.3g/kg dosage per GB 2760-2014.
Chemical Processing: Curbs foam in acid/alkali reactions to reduce equipment corrosion.
Type | Siloxane defoamer |
Appearance | Milky liquid |
Active Content | Polydimethylsiloxane (with silica) |
Dynamic Viscosity | 1,000-3,000 mPa·s |
Flash Point (closed cup) | >100°C |
pH Range | 2-12 |
Surface Tension (0.5% solution) | 22 dyn/cm |
Recommended Dosage | 0.1%-1% (on total system) |
Packaging | 25kg/drum or 200kg/IBC |
Contact With Us:
E-mail: wangxingqiang@ericwchem.com
Have a Questions? Call Us:
Add:
Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China