Fumed Silica

Fumed Silica is also popular as white carbon black and pyrogenic silica. Fumed Silica is non toxic, non-polluting, high-tech inorganic fine white chemical. In high purity fumed silica the silica content is above 99.8%. The particle size varies from 7 to 40 nm. This new ultra-fine inorganic material become a irreplaceable material due to its small particle size, large specific surface area, strong surface absorption, surface energy, heat resistance property. Production Process: Fumed silica is made from flame pyrolysis of silicon tetrachloride vaporized in 1800C electric arc. Available Grade: PME-SS-150, PME-SS-200, PME-SS-300, PME-SS-380. Special request for customization can be prepared. Technical Details: Parameters PME-SS-150 PME-SS-200 PME-SS-300 PME-SS-380 SiO2 99.8% 99.8% 99.8% 99.8% pH Value 3.7-4.5 3.7-4.5 3.7-4.5 3.7-4.5 Specific Surface Area, m2/g 150 30 20 30 300 30 380 30 105oC Volatile Mass Fraction, wt% 1 1.5 2 2 Burning Loss Weight Mass fraction, wt% 1.5 2 2 2 45um Sieve residue, mg/kg 250 250 250 250 Appearance Density, g/l 50 50 50 50 Al2O3 mass fraction, mg/kg 400 400 400 400 TiO2 mass fraction, mg/kg 200 200 200 200 Fe2O3 mass fraction, mg/kg 30 30 30 30 Chloride mass fraction, mg/kg 250 250 250 250 Carbon mass fraction, mg/kg 0.2 0.2 0.2 0.2

Characteristics Control the liquid system, adhesive, polymer¡¡¥s rheology and thixotropy. As additive agent used to prevent subside, thickening and prevent sagging. Reinforce hrc high temperature sulfuration silicon rubber and rtv-2k room temperature sulfuration silicon rubber. Improve the quality of the powder, and improve the liquidity and anti-blocking characteristic. Application Paint and coating . Unsaturated polyester resins, laminating resins and gel coat. Hrc high temperature sulfuration silicon rubber and rtv-2k room temperature sulfuration silicon rubber. Adhesive and fluid sealant Printing ink cable rubber plant protection food and cosmetics Paper and pe bag 10kg/bag

Hydrophilic Fumed Silica A.Characteristic: It is a white and colloidal micro-particle with its primary micro-particle from 5-40 nm and has obvious properties such as thixotropy, reinforcing, thickening and filling etc. and is insoluble in all kinds of solvents and liquids except hydrofluoric acid and concentrated bases. It is used widely in silicon rubber, construction sealant, coating, electron and electric, aerospace, medicine and medical material, resin processing, printing ink, pesticide and other industries. F-150: used widely in silicone acid rubber, sulfurized silicone rubber in ambient temperature (low water content), silicone neutral rubber. F-200: used widely in sealing ring, sealing gasket, petroleum pipeline, insulator, tablet powdered preparation, artificial viscera, infusion tube, latex nipple and high quality oil ink. F-380: used widely in reinforcing agent for silicone rubber, medical silicone rubber for transparent artificial organs and artificial heart etc. Packing: packed with multi-layer paper plastic compound bag with net weight of 5 kg or 10 kg, or packed by whole plastic seal for users having special demand on water content. 10kg per bag

Fumed silica (CAS number 112945-52-5), also known as pyrogenic silica because it is produced in a flame, consists of microscopic droplets of amorphous silica fused into branched, chainlike, three-dimensional secondary particles which then agglomerate into tertiary particles. The resulting powder has an extremely low bulk density and high surface area. Its three-dimensional structure results in viscosity-increasing, thixotropic behavior when used as a thickener or reinforcing filler. Fumed silica has a very strong thickening effect. Primary particle size is 550 nm. The particles are non-porous and have a surface area of 50600 m2/g. The density is 160190 kg/m3. APPLICATION Paints and coatings Unsaturated polyester resins, laminating resins and gel coats HTV- and RTV-2K-silicone rubber Adhesives and sealants Printing inks Cable compounds and cable gels Plant protection Adhesives and sealants Chemical mechanical planarization (CMP) Coatings Composites Food additives Greases Pharmaceuticals Printing and packaging Silicone sealants Skin and beauty care product

It is white, loose, amorphous, non-toxic and non-odorous nonmetal oxide. Due to the nanometer effect, it has excellent properties, such as reinforce, bodying, thixotropy, insulation and others.Therefore, it can be widely used in the rubber, plastic, paint coating, adhesive, seals and other polymer industrial area. Surface Area (m2/g): 150, 200

Fumed silica is the superfine micro-nano fine chemical product , which is divided into hydrophilic type and hydrophobic type in accordance with their different surface treatments, its appearance is white powder , native particle size ranges from 5nm to 40nm, with signficant functions of thixotropy, reinforcing, thickening and filling. it is widely used in the industries of rubber , sealant, plastic , resin, paint, printing ink, papermaking, medicine, cosmetics food etc.

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