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

DOWSIL FS 91 Defoamer

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.

Product Information of DOWSIL FS 91 Defoamer

  1. Fast Foam Breakdown: Nano siloxane particles destroy foam in 3 minutes, perfect for high-shear dyeing and water treatment processes.

  2. Extreme Condition Resistance: Withstands pH 2-12, high salinity, and 100°C heat without performance degradation.

  3. Extended Shelf Life: Remains stable for 360 days at -20°C to 50°C, staying homogeneous after dilution.

  4. Eco-Friendly Certification: APEO-free, VOC <50g/L, and certified under EU REACH and China GB 24408.

  5. Cost-Saving Performance: 0.1%-1% dosage reduces costs by 30% compared to traditional defoamers.

Areas of Application of DOWSIL FS 91 Defoamer

  1. Textile Dyeing: Manages foam in jet dyeing machines to minimize dye waste (0.2%-0.8% dosage).

  2. Industrial Water Treatment: Lessens foam in high-COD aeration tanks, lowering the carryover of sludge.

  3. Food Processing: FDA-compliant for foam control in fermenters and cleaning lines, with a maximum 0.3g/kg dosage per GB 2760-2014.

  4. Chemical Processing: Curbs foam in acid/alkali reactions to reduce equipment corrosion.

Specifications Of DOWSIL FS 91 Defoamer

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



Get in Touch with ERICW
Let competitive chemical materials go global.

Your Name *

Your Email *

Your Phone

Country

Your Message *