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

DOWSIL FS 1277 Defoamer

DOWSIL FS 1277 is a fluorosilicone defoamer with advanced thermo-mechanical properties to boost your competitiveness. It is a transparent liquid (1,000-3,000 mPa·s viscosity) that performs stably at ≤150°C and pH 2-12, enabling rapid bubble suppression in high-shear coatings and cleaning systems. Certified by ISO 9001 and REACH, it cuts coating defects by 40% versus conventional defoamers while increasing gloss by 18%.

Product Information of DOWSIL FS 1277 Defoamer

  1. Fluorosilicone Hybrid Advantage: Fluorocarbon-siloxane structure lowers surface tension by 50% compared to standard silicones.

  2. Strong Process Adaptability: Stays stable in 150°C environments and under high-pressure spraying (≥50 bar).

  3. Chemical Stability: Does not react with epoxy or polyurethane curing systems.

  4. Eco-Friendly Compliance: Free of APEO and VOC, meeting GB 18582-2020 standards.

  5. Cost-Saving Performance: Delivers 12% cost savings when used at 0.05%-0.3% dosage.

Areas of Application of DOWSIL FS 1277 Defoamer

  1. Waterborne Coatings: Eliminates microbubbles in roller and spray processes (0.1%-0.5% dosage).

  2. UV Inks: Controls foam in photopolymerizable inks (with 200-500 mPa·s viscosity).

  3. Cosmetic Emulsions: Reduces bubbles in O/W systems during 60°C homogenization.

  4. Industrial Cleaners: Suppresses foam in pH 12 alkaline degreasers.

  5. Paper Sizing: Boosts surface smoothness by 35% in starch sizing agents.

Specifications Of DOWSIL FS 1277 Defoamer

Type
Fluorosilicone defoamer
Appearance
Colorless to pale-yellow liquid
Active Content
Fluorosiloxane polymer (100%)
Dynamic Viscosity
1,000-3,000 mPa·s
pH Range
2-12
Surface Tension
21.5 dyn/cm
Flash Point
>150°C (closed cup)
Thermal Stability
No stratification (150°C/24h)
Recommended Dosage
0.05%-0.3% (by total weight)
Shelf Life
360 days (sealed, 5-35°C)
Packaging
20kg/PE drum or 200kg/IBC tote


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