Hydrophobic Amorphous Silica – Modified Fumed Silica for Non-Polar Systems

Hydrophobic Fumed Silica

Product Name: Hydrophobic Fumed Silica
CAS No.: 68909-20-6 (Hydrophobic fumed silica by HMDS treatment)

Appearance: White, ultra-fine, water-repellent powder

Product Description :

Hydrophobic fumed silica is modified from standard fumed silica by surface treatment with organosilanes such as HMDS or DDS. It repels water, offers enhanced dispersion in non-polar systems, and improves anti-caking, moisture resistance, and free-flowing properties.

Key Features:

Water-repellent surface

Better compatibility with oils, resins, and waxes

Improves anti-caking and flow properties in powder systems

Available in multiple treatment grades

Applications:

Silicone oils and greases

Plastic and rubber masterbatches

Powder coatings

Cable compounds

Powder flow aids in hydrophobic systems

Anti-caking in agrochemicals and powder blends

Hydrophobic Fumed Silica – Technical Data

Optional model reference:

HFS-150: modified from FS-150, suitable for grease, plastics

HFS-200: modified from FS-200, suitable for coatings and moisture-proof systems

HFS-300: High surface area type, enhanced dispersion and hydrophobic effect

Packaging & Storage:

Multi-layer kraft paper bag, lined with moisture-proof PE film, conventional packaging is 10kg, 15kg or 20kg. 

Custom packing on request.

Should be stored in a dry, cool and well-ventilated environment to avoid moisture absorption and agglomeration.

Shelf life: 24 months in the original sealed packaging