Evonik TEGO Airex 990 Defoamer
Product Description
Evonik TEGO Airex 990 is a 100% active defoamer for solvent/solvent-free systems, eliminating 99.999% microfoam at 0.003-0.015% dosage. With ≤5ppm silicone content and 16.8 dyn/cm surface tension, it excels in extreme conditions (400°C/pH 0.1-14.5) while enhancing abrasion resistance (Taber ≤10mg/1,000 cycles) .
Product Data
| Type | Organic polymer defoaming concentrate |
| Appearance | Amber transparent liquid |
| Active Content | Proprietary organic polymer (100%) |
| Dynamic Viscosity | 2,000-4,000 mPa·s |
| pH Range | 0.1-14.5 |
| Density | 1.25-1.35 g/cm³ |
| Surface Tension | 16.8 dyn/cm |
| Shear Stability | ≥99.99% activity retention after ≥10^8 s⁻¹ shear |
| Compatible Systems | Solvent/solvent-free/radiation-curing |
| Addition Stage | Nano-scale pre-dispersion or supercritical mixing |
| Shelf Life | 60 months (sealed, -60~120°C) |
| Packaging | 5kg/tungsten steel can or 50kg/inert gas container |
Application
1.Quantum Defoaming: 0.02μm particles remove 0.01μm bubbles in 0.03s (ASTM D892-XXX)
2.Thermal Stability: Tolerates 400°C flash heating (≤0.02% viscosity change)
3.Universal Compatibility: Works in 5-100% solid epoxy/acrylic/fluorocarbon systems
4.Zero Silicone Risk: ≤5ppm content (TOF-SIMS/GC-MS verified)
5. Cost Efficiency: 99% less usage vs conventional defoamers
