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

TEGO Foamex 822 Defoamer

TEGO Foamex 822 is a German-origin defoamer, formulated as a polyether-silicone/fumed silica emulsion. Engineered with advanced thermo-mechanical properties to secure a competitive edge, it appears as a milky homogeneous liquid with a viscosity of 250-600 mPa·s. It demonstrates universal compatibility in solvent-borne, solvent-free, and radiation-curing systems, achieving ≥99% microfoam elimination at a dosage of 0.05%-0.3%. Certified by REACH, ISO 9001, and GB 30981-2020, it enhances transparency (haze ≤0.4%) and leveling (orange peel Ra≤0.1 μm) in premium varnish systems and high-speed flow coating (≥60 m/min).

Features Of TEGO Foamex 822 Defoamer

  1. 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.

  2. Zero Silicone Risk: Passes FTIR/GC-MS residue tests with no siloxane detected, eliminating concerns of silicone-related defects or contamination in sensitive applications.

  3. Sustained Efficiency: Features 0.2 μm hybrid particles that eliminate bubbles in 1 second (per ASTM D892-XIV standards), ensuring rapid and long-lasting foam control.

Typical Applications Of TEGO Foamex 822 Defoamer

  1. Wood Lacquers: Maintains ≥97% transmittance in ≥80% solid PU flow coating, preserving clarity and high gloss in premium wood finishes.

  2. Automotive Refinish: Achieves color stability (ΔE≤0.5) after 2,000 hours of QUV testing in solvent-borne acrylics, ensuring long-term finish quality in automotive refinishing.

  3. Electronic Insulation: Ensures ≥35 kV/mm dielectric strength in epoxy with ≥30,000 mPa·s viscosity, providing reliable insulation performance for electronic components.

Specifications Of TEGO Foamex 822 Defoamer

Type
Polyether-silicone/fumed silica emulsion
Appearance
Milky homogeneous liquid
Active Content
Polyether-silicone + fumed silica (20%)
Dynamic Viscosity
250-600 mPa·s
pH Range
3-11
Density
1.04-1.12 g/cm³
Surface Tension
22.5 dyn/cm
Shear Stability
≥95% activity retention after ≥10^3 s⁻¹ shear
Addition Stage
Grinding or letdown phase
Shelf Life
24 months (sealed, 5-40°C)
Packaging
25kg/PE drum or 200kg/IBC tote



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