TEGO Foamex 825 is a German-origin defoamer, formulated as a polyether-silicone/hydrophobic silica composite. Engineered with advanced thermo-mechanical properties to secure a competitive edge, it appears as a milky homogeneous liquid with a viscosity of 300-800 mPa·s. It maintains stable activity under pH 3-11 and temperatures ≤60°C, achieving 80% foam suppression at a dosage of 0.05%-0.15%. Certified by REACH, ISO 9001, and GB 30981-2020, it enhances transparency (haze ≤1.8%) and leveling (Ra≤0.25 μm) in waterborne wood coatings and leather finishes.
Nano Hybrid Technology: Equipped with 1.5 μm composite particles that collapse foam in 5 seconds (per DIN 53941 standards), ensuring efficient foam control through advanced particle design.
Full Compatibility: Stable in 30-75% PVC (pigment volume concentration) styrene-acrylic systems and 40-60% solid PU (polyurethane) formulations, adapting to diverse water-based coating types.
Self-Emulsifying Design: Allows direct addition during the grinding process without pre-dispersion, simplifying production workflows and reducing processing steps.
Waterborne Wood Varnishes: Achieves ≥93 GU (Gloss Unit) gloss in nitrocellulose (NC) systems with ≥35% solids, enhancing the visual appeal of wood finishes.
Automotive Refinish: Delivers a DOI (Distinctness of Image) ≥90 in ≥80 μm 3C2B (three-coat two-bake) processes, ensuring high-quality finishes in automotive refinishing.
Leather Finishes: Enhances moisture permeability to ≥7,500 g/m²/24h, improving the breathability and comfort of leather products.
Type | Polyether-silicone/silica composite emulsion |
Appearance | Milky homogeneous liquid |
Active Content | Polyether-silicone + hydrophobic silica (18%) |
Dynamic Viscosity | 300-800 mPa·s |
pH Range | 3-11 |
Density | 1.01-1.07 g/cm³ |
Surface Tension | 23.5 dyn/cm |
Freeze-Thaw Test | Passed -10°C/5 cycles |
Addition Stage | Early grinding or letdown phase |
Shelf Life | 24 months (sealed, 5-40°C) |
Packaging | 25kg/PE drum or 200kg/IBC tote |
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E-mail: wangxingqiang@ericwchem.com
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