TEGO Foamex 840 is a German-origin defoamer, formulated as a 100% active polyether-silicone concentrate. Engineered with advanced thermo-mechanical properties to secure a competitive edge, it appears as a light amber transparent liquid with a viscosity of 800-1,800 mPa·s. It demonstrates superior compatibility in waterborne industrial and coil coating systems, achieving 99.8% foam suppression at a dosage of 0.01%-0.05%. Certified by REACH, ISO 9001, Blue Angel, and GB 24409-2020, it enhances weatherability (QUV 8,000h ΔE≤0.3) and anti-fouling (contact angle ≥105°) in high-speed roller coating (≥100 m/min) and high-temperature baking (≤280°C/30min) processes.
Zero Silica Risk: Passes ICP-OES tests with no fumed silica migration, avoiding contamination or surface defects associated with silica particles.
Extreme Process Stability: Withstands 280°C/30min baking (with ≤1% viscosity change) and pH 1-13, ensuring reliability across harsh processing conditions.
Nano Defoaming: Features 0.08 μm molecular clusters that eliminate bubbles in 0.3 seconds (per ASTM D892-XXII standards), delivering rapid and precise foam control.
Long-Term Efficiency: Sustains ≥30 days of foam control at 50°C/95% relative humidity, ensuring consistent performance over extended periods.
Pre-Painted Coils: Achieves ≤1T bend test in polyester systems with ≥80% solids, ensuring flexibility and durability in pre-painted coil coatings.
Automotive Waterborne Primers: Endures ≥2,000h salt spray in ≥20μm electro-deposition primers, enhancing corrosion resistance for automotive substrates.
Container Coatings: Resists ≥5,000h damp heat in ≥80% zinc-rich epoxy formulations, providing long-term protection for container surfaces.
Type | Polyether-silicone defoaming concentrate |
Appearance | Light amber transparent liquid |
Active Content | Polyether-silicone (100%) |
Dynamic Viscosity | 800-1,800 mPa·s |
pH Range | 1-13 |
Density | 1.12-1.20 g/cm³ |
Surface Tension | 21.8 dyn/cm |
Thermal Stability | ≤1% viscosity change (280°C/30min) |
Compatible Systems | Waterborne industrial/coil coatings |
Addition Stage | Grinding premix or letdown phase |
Shelf Life | 60 months (sealed, -20~50°C) |
Packaging | 30kg/stainless steel drum or 250kg/IBC tote |
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E-mail: wangxingqiang@ericwchem.com
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