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

Evonik Degussa AEROSIL R974 Fumed silica

Evonik Degussa AEROSIL R974 is a hydrophobic fumed silica designed for rheology control and anti-settling in coatings, adhesives, and sealants. Surface-treated with dimethyldichlorosilane, it offers excellent dispersion, low viscosity impact, and enhanced storage stability. Ideal for silicone rubber, RTV formulations, and high-performance composites requiring thixotropy and reinforcement.
  • evonik degussa aerosil r974 fumed silica_68957636
  • evonik degussa aerosil r974 fumed silica_68957636

Features Of Evonik Degussa AEROSIL R974 Fumed silica

  1. Highly hydrophobic surface treatment with dimethyldichlorosilane for superior moisture resistance.

  2. Optimized specific surface area (~110 m²/g) balancing thickening efficiency and dispersion stability.

  3. Low density and excellent flowability, enabling easy handling and uniform incorporation into formulations.

  4. Consistent particle morphology and narrow aggregate size distribution for reproducible rheological performance.

  5. Non-reinforcing grade — designed primarily for viscosity control and anti-settling without significant mechanical reinforcement.

Typical Applications Of Evonik Degussa AEROSIL R974 Fumed silica

  1. Thixotropic agents in solvent-based coatings and industrial maintenance paints.

  2. Anti-settling additives in pigment concentrates and suspension-based agrochemical formulations.

  3. Rheology modifiers in adhesives and sealants, especially silicone and polyurethane systems.

  4. Free-flow aids in pharmaceutical and food-grade powders requiring hydrophobicity and low dusting.

  5. Stabilizers in liquid cleaning products and specialty inks to prevent phase separation.

Specifications Of Evonik Degussa AEROSIL R974 Fumed silica

Chemical TypeHydrophobic fumed silica
Product FormFree-flowing white powder
AppearanceWhite, amorphous, odorless powder
Primary ApplicationsRheology control, anti-settling, thixotropy, free-flow aid
Key FeaturesDimethyldichlorosilane surface treatment, high hydrophobicity
Specific Surface Area (BET)Approx. 110 m²/g
SiO₂ Content≥ 99.8 wt.%
Ignition Loss (105 °C, 2 h)≤ 1.5 wt.%


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