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

Evonik TEGO Airex 931 Defoamer

Evonik TEGO Airex 931 Defoamer is a silicone-free, water-based defoaming agent designed for aqueous systems like coatings, inks, and adhesives. It delivers rapid air release and excellent foam suppression without affecting gloss or substrate wetting. Compatible with both anionic and nonionic formulations, it ensures stable performance across pH ranges and temperatures.
  • evonik tego airex 931 defoamer_c2675374
  • evonik tego airex 931 defoamer_c2675374

Features Of Evonik TEGO Airex 931 Defoamer

  1. Highly effective silicone-free defoamer for aqueous systems.

  2. Excellent compatibility with a broad range of water-based formulations without causing haze or surface defects.

  3. Rapid foam knock-down and sustained antifoam performance under dynamic process conditions.

  4. Low dosage requirement, enabling cost-efficient use in sensitive applications.

  5. Stable in neutral to moderately alkaline pH environments (pH 5–10).

Typical Applications Of Evonik TEGO Airex 931 Defoamer

  1. Waterborne architectural coatings and interior paints.

  2. Industrial maintenance coatings and coil coatings.

  3. Adhesives and sealants based on acrylic, PVA, or styrene-butadiene dispersions.

  4. Textile printing pastes and pigment dispersions.

  5. Construction chemicals including cementitious mortars and tile adhesives.

Specifications Of Evonik TEGO Airex 931 Defoamer

Chemical TypePolyether-modified nonionic polymer
Product FormOpaque liquid
AppearanceWhite to off-white, slightly viscous liquid
pH (1% aqueous solution)6.5–7.5
Density (20 °C)Approx. 1.02–1.04 g/cm³
Viscosity (25 °C)Approx. 500–1,500 mPa·s
Solubility / MiscibilityPartially miscible with water; forms stable dispersion upon stirring
Storage StabilityAt least 12 months in original sealed container at 5–30 °C


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