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

TEGO Airex 921 Defoamer

TEGO Airex 921 is a German-origin defoamer, formulated as a high-compatibility organic polymer solution. Engineered with advanced thermo-mechanical properties, it is designed to secure a competitive edge in industrial applications. This transparent pale golden liquid (with a viscosity of 80-200 mPa·s) offers ultra-wide compatibility in solvent-borne, solvent-free, and radiation-curing systems, achieving ≥99.6% microfoam elimination at a dosage of 0.08%-0.3%. Certified by REACH, ISO 9001, and GB 30981-2020, it enhances gloss (60°≥96 GU) and adhesion (cross-cut ≥4B) with a surface tension as low as 23.8 dyn/cm (in 0.4% solution).

Features Of TEGO Airex 921 Defoamer

  1. Zero Silicone Risk: Passes GC-MS/FTIR tests with no craters or fisheyes, avoiding issues related to silicone contamination and ensuring smooth surface finishes.

  2. Universal Compatibility: Remains stable in 10-85% solid epoxy/acrylate/PU systems, adapting to a wide range of formulation requirements.

  3. High-Speed Defoaming: Features 0.15 μm active molecules that eliminate 0.6 μm bubbles in 0.6 seconds (per ASTM D892-XIX standards), ensuring rapid and efficient foam control.

  4. Low-VOC Formula: Complies with EU 2014/34/EU, using low-aromatic solvent (aniline point ≥78°C) to meet environmental and regulatory standards.

Typical Applications Of TEGO Airex 921 Defoamer

  1. Auto Refinish Clearcoats: Achieves a DOI (Distinctness of Image) ≥98.8 in acrylic spray systems with ≥75% solids, enhancing the high-gloss finish of automotive refinishes.

  2. Wood Flow Coating: Eliminates pinholing in waterborne PU formulations with ≥35% solids (capable of ≥8,000 abrasion cycles), ensuring smooth, durable wood coatings.

  3. Electronic Conformal Coatings: Endures ≥2,000 hours of salt spray in solvent-free epoxy with ≥80,000 mPa·s viscosity, providing reliable protection for electronic components.

Specifications Of TEGO Airex 921 Defoamer

Type
Organic polymer solution defoamer
Appearance
Transparent pale golden liquid
Active Content
Proprietary organic polymer (10%)
Solvent
Low-aromatic solvent (aniline point ≥78°C)
Dynamic Viscosity
80-200 mPa·s
pH Range
3-11
Density
0.94-1.02 g/cm³
Surface Tension
23.8 dyn/cm
Flash Point (PMCC)
≥38°C
Compatible Systems
Solvent/solvent-free/radiation-curing
Addition Stage
Letdown phase or inline dosing
Shelf Life
24 months (sealed, 0-50°C)
Packaging
25kg/galvanized drum or 200kg/IBC tote


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