Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Evonik TEGO Airex 990 Defoamer

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) .

Features Of Evonik TEGO Airex 990 Defoamer

  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

Typical Applications Of Evonik TEGO Airex 990 Defoamer

  1. Semiconductor: Enables ≥5 W/m·K thermal conductivity in ≤20nm silver adhesives

  2. Aerospace: Withstands 1,500°C in plasma-sprayed thermal barriers

  3. Flexible Electronics: Endures 500,000 folds on PI substrates (≥99.99% transmittance)

Specifications Of Evonik TEGO Airex 990 Defoamer

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



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