Evonik TEGO Airex 920 Silicone-free Defoamer
Product Description
Evonik TEGO Airex 920 is a high-performance defoamer (200-400 mPa·s) for coatings is a high-performance defoamer (200-400 mPa·s) for coatings, eliminating 99.8% microfoam at 0.04-0.2% dosage. REACH/ISO certified, it enhances gloss (60°≥97 GU) and weatherability (QUV 6,000h ΔE≤0.5) in epoxy/acrylic systems.
Product Data
| Type | Organic polymer solution defoamer |
| Appearance | Transparent amber liquid |
| Active Content | Proprietary organic polymer (24%) |
| Solvent | Low-aromatic solvent (aniline point ≥85°C) |
| Low-aromatic solvent (aniline point ≥85°C) | 200-400 mPa·s |
| pH Range | 3-12 |
| Density | 0.95-1.05 g/cm³ |
| Surface Tension | 22.5 dyn/cm |
| Flash Point (PMCC) | ≥45°C |
| Compatible Systems | Solvent/solvent-free/radiation-curing |
| Addition Stage | Letdown phase or inline dosing |
| Shelf Life | 24 months (sealed, 0-50°C) |
| Packaging | 20kg/galvanized drum or 200kg/IBC tote |
Application
-Auto Clearcoats: DOI≥99 in high-solid acrylic spray coatings
-Wood Coatings: Enables 600+ grit sanding in waterborne PU (80+ m/min)
-E-Encapsulants: Void-free in 100,000+ mPa·s solvent-free epoxy
-Optical Films: Maintains 99.6% transmittance with ≤0.1% haze
