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

Evonik AEROSIL R812 Hydrophobic Fumed Silica

Evonik AEROSIL R812 is a hydrophobic fumed silica imported from Germany, post-treated with organosilane (HMDS) from A300. It is designed for rheology control and performance upgrading of complex systems, with high transparency, strong anti-corrosion and excellent processability, suitable for high-end formulations in multiple industries.

Features Of Evonik AEROSIL R812 Hydrophobic Fumed Silica

  1. Professional hydrophobic modification - Treated with HMDS organosilane, excellent hydrophobicity, suitable for waterborne, solventborne and other systems, improving water resistance stability

  2. Precise rheology control - Efficiently controls flow in complex liquid systems such as two-component epoxy and 2K PU, strongly anti-sagging and anti-settling, ensuring uniform construction

  3. High transparency for high-end applications - Outstanding transparency, especially suitable for high-end coatings such as automotive OEM paint and clear coat, without affecting product optical appearance

  4. Anti-corrosion and stabilization enhancement - As an anti-settling agent, it improves pigment dispersion stability and enhances coating anti-corrosion performance, extending the service life of end products

  5. Multifunctional adaptation - It has both powder flow aid and silicone rubber reinforcement effects, easy to add, good compatibility, and suitable for multi-scenario processing needs

Typical Applications Of Evonik AEROSIL R812 Hydrophobic Fumed Silica

  1. Coating systems - Automotive OEM paint, industrial paint, marine paint, flow control and anti-settling, enhance anti-corrosion, improve coating texture and durability

  2. Adhesives and sealants - Control thixotropy, prevent sagging, enhance bonding strength and water resistance, adapt to multi-scenario sealing needs

  3. Silicone rubber products - Improve mechanical and optical properties, optimize product strength and light transmittance, suitable for high-end silicone rubber formulations

  4. Powder coatings - Used as a flow aid, improve powder fluidity, anti-caking, enhance spraying uniformity and powder transfer efficiency

  5. Radiation curing systems - Suitable for UV and other radiation curing scenarios, flow control and anti-sagging, ensuring stable appearance and performance of cured products

Specifications Of Evonik AEROSIL R812 Hydrophobic Fumed Silica

BrandEvonik
Product SeriesAEROSIL Hydrophobic Fumed Silica
Product TypeHydrophobic Fumed Silica
Surface Treatment AgentHMDS (Hexamethyldisilazane, Organosilane)
Raw Material BaseA300 Fumed Silica
BET Surface Area230-290 m²/g
Carbon Content2.0-3.0 wt%
Loss on Drying<0.5 wt%


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