TEGO Foamex 842 is a German-origin defoamer, formulated as a polyether-silicone solution. Engineered with advanced thermo-mechanical properties to secure a competitive edge, it appears as a pale yellow transparent liquid with a viscosity of 250-600 mPa·s. It demonstrates universal compatibility in solvent-borne, solvent-free, and radiation-curing systems, achieving ≥99.7% microfoam elimination at a dosage of 0.03%-0.15%. Certified by REACH, ISO 9001, and GB 30981-2020, it enhances gloss (60°≥98 GU) and leveling (orange peel Ra≤0.05 μm) in varnish systems and high-speed flow coating (≥80 m/min).
Zero Silica Risk: Passes ICP-OES tests with no fumed silica migration, eliminating concerns of silica-related contamination or surface defects in sensitive applications.
Universal Compatibility: Maintains stability in 20-95% solid epoxy/acrylic/PU systems, adapting to a wide range of formulation requirements across different resin types and solid contents.
Rapid Defoaming: Features 0.1 μm molecular clusters that eliminate bubbles in 0.5 seconds (per ASTM D892-XXIII standards), ensuring ultra-fast and efficient foam control.
Radiation-Curing Optimized: Exhibits no yellowing (Δb*≤0.15) at ≥500 mJ/cm², making it ideal for radiation-curing systems where color stability is critical.
Automotive Clearcoats: Achieves a DOI (Distinctness of Image) ≥99 in ≥85% solid acrylic-amine systems, ensuring a high-gloss, mirror-like finish for automotive clear coatings.
Premium Wood Coatings: Endures ≥5,000 abrasion cycles in waterborne PU flow coating at speeds ≥100 m/min, enhancing durability and wear resistance for high-end wood finishes.
Optical Films: Maintains ≥99.3% transmittance in UV acrylates (with a refractive index of 1.48-1.50), preserving optical clarity for precision optical film applications.
Type | Polyether-silicone solution defoamer |
Appearance | Pale yellow transparent liquid |
Active Content | Polyether-silicone (60%) |
Dynamic Viscosity | 250-600 mPa·s |
pH Range | 3-11 |
Density | 1.05-1.12 g/cm³ |
Surface Tension | 22.0 dyn/cm |
Flash Point (PMCC) | ≥90°C |
Compatible Systems | Solvent/solvent-free/radiation-curing |
Addition Stage | Grinding or letdown phase |
Shelf Life | 36 months (sealed, 5-40°C) |
Packaging | 25kg/galvanized drum or 200kg/IBC tote |
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E-mail: wangxingqiang@ericwchem.com
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