Hydrophobic Silica Powder Supplier for Coatings and Cosmetics
KOSNANO hydrophobic fumed silica is a synthetic, high-purity amorphous silicon dioxide， which treated with organosilanes or siloxanes to achieve excellent water-repellent properties. Our Hydrophobic Fumed Silica featuring a primary particle size range of 7 nm to 50 nm and a chemical purity rating exceeding 99.8%, and our modified silica grains maintain an exceptionally low moisture adsorption rate below 1.0%. Engineered as an efficient anti-caking filler, thixotropic thickener, and moisture-resistant agent, KOSNANO hydrophobic silica powder provides advanced rheology control for automotive clearcoats, oily cosmetics, sealants, and powdered oil carriers.
Chemical Surface Modification & Moisture Prevention
How does the chemical post-treatment process alter KOSNANO hydrophobic silica powder to repel water?
During specialized flame-hydrolysis processing, our engineering team chemically reacts active surface silanol groups with dimethyldichlorosilane (DDS) or hexamethyldisilazane (HMDS). This precise chemical grafting covers the nano-sphere network, lowering the total residual silanol profile and driving carbon content metrics between 0.8% and 3.0% depending on the grade specification. As a direct result, the treated particle structure exhibits a high water contact angle, maintaining a stable ignition weight loss threshold under 2.5%.
Particle Size Distribution & Application Performance
What unique formulation benefits do KOSNANO's 7nm and 50nm hydrophobic silica nanoparticles deliver?
Our fine Hydrophobic Silica 7nm grade features an expansive specific surface area (BET) of 200 +/- 30 m2/g, providing powerful anti-sagging thixotropic control and transparency in high-end polyurethane clearcoats. For complex organic systems, our Hydrophobic Silica 50nm variation lowers compound viscosity, functioning as an exceptional anti-settling agent in industrial marine paints and heavy epoxy adhesives. These specialized hydrophobic silica nanoparticles prevent premature pigment agglomeration, improving overall storage stability for multi-phase fluid systems by up to 40%
Which global commercial grades from Evonik Aerosil, Cabot, and Wacker can KOSNANO replace?
KOSNANO maintains strict quality controls allowing seamless cross-reference replacements for mainstream global silica brands, successfully optimizing specialized raw material procurement costs by 15% to 30%. Our DDS-treated grades provide identical physical parameters to Evonik AEROSIL R972, Cabot CAB-O-SIL TS-610, and Wacker HDK H20. For high-performance silicone rubber compounding, our HMDS-treated alternatives serve as an exact drop-in match to AEROSIL R812 and CAB-O-SIL TS-720 without altering your existing production shear speeds.
Related Products
hydrophobic silica gel
Beyond our dry core powder line, our chemical processing facilities engineer specialized Hydrophobic Colloidal Silica liquid dispersions featuring a consistent 30% solid resin weight fraction. For targeted oil-absorption and surface gloss modification tasks, we supply granulated Hydrophobic Silica Gel with a porous pore volume matrix capacity of 1.2 cm3/g. These multiple configurations allow universal cross-industry application, serving as dependable anti-caking additives for cosmetic powders and moisture-barrier protective layers for electronic packaging.