AEROSIL R 8200 is a structure-modified, highly hydrophobic fumed silica from Evonik, with a BET surface area of 135-185 m²/g. Due to its low thickening efficiency, high loading levels at low viscosities are achievable, making it a reference grade for composite material buyers and powder coating formulators sourcing anti-caking and free-flow additives.
Key Technical Properties of AEROSIL R 8200
According to Evonik’s official coating-additives technical data sheet, this grade is characterized by the following properties, which buyers should confirm against their own incoming-goods testing:
| Appearance | White solid |
| Specific surface area (BET) | 135 – 185 m²/g |
| Carbon content | 2.0 – 4.0% |
| Loss on drying | < 0.5% |
| pH value | > 5.0 |
| Tamped density | Approx. 140 g/l |
| Recommended addition level | 0.05 – 0.5 wt-% of total formulation |
| Shelf life | 24 months from date of manufacture |
| CAS number | 68909-20-6 |
Why Buyers Choose This Effective Anti-Caking Additive
Evonik’s technical data sheet lists the key benefits of this grade as an anti-caking and free-flow agent for powders, with high loading possible and low rheological effect. This is important for buyers working with:
- High loading levels at low viscosities due to its low thickening efficiency
- Anti-caking and free-flow performance in powder systems
- Scratch and abrasion resistance support in the final coating film
- Corrosion resistance support in protective coating formulations
Suitability Across Resin Systems
Per Evonik’s suitability matrix, AEROSIL R 8200 is suitable for solventborne and 100% systems, and for polyester resins and epoxy resins, which is important for buyers formulating powder coatings across different resin chemistries without switching additives.
Typical Applications for AEROSIL R 8200
Evonik names powder coatings as the typical application for this grade. This application is relevant to auxiliary agents used in composite and coating manufacturing, and the HMDS-based hydrophobic treatment also supports its use in defoamer, sealant, and silicone rubber systems reported by other Evonik product documentation.
Sourcing This Grade for Important Powder Coating Applications
As a recommended international brand product, AEROSIL R 8200 is available through supply chain resource support for overseas buyers who need consistent hydrophobic fumed silica performance across production lots. Addition to the formulation is possible either as supplied or as a predilution. Because performance depends on dispersion method and compatibility with the target resin system, buyers sourcing this grade for powder coating formulations should request a current certificate of analysis for each shipment and verify BET surface area, carbon content, and loss-on-drying figures against Evonik’s official technical data sheet before full-scale use.
FAQ
What is the BET surface area of AEROSIL R 8200?
Evonik’s technical data sheet lists the specific surface area (BET) at 135 – 185 m²/g.
What surface treatment does AEROSIL R 8200 have?
AEROSIL R 8200 is a structure-modified, highly hydrophobic fumed silica, treated to achieve low thickening efficiency at high loading levels.
Which resin systems is AEROSIL R 8200 suitable for?
Evonik lists it as suitable for solventborne and 100% systems, and for polyester and epoxy resin systems used in powder coatings.
What is the recommended addition level?
Evonik recommends an addition level of 0.05-0.5 wt-% calculated on the total formulation, added as supplied or as a predilution.
How can I request a quote or sample?
Contact our team with your target application and required volume, and we will provide sourcing and supply chain resource support based on current availability.
Looking to source AEROSIL R 8200 for your next powder coating formulation? Contact our team today with your application details and volume requirements, and we will help connect you with the right supply chain resources.
