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Primary particle size: 20nm;
SiO2 content: 99%;
SSA: 150~300m²/g
Apparent density: 0.1~0.18g/m3
PH: 4~7
H2O: 1.5-4.0
Features: 

Small agglomeration, uniform particle size distribution, good dispersion;
Large specific surface area, strong adsorption property;
high lipophilic and hydrophobic properties (hydrophobic, lipophilic specification)
Low impurity content, non-toxic, no pollution;
Strict production control, high quality stability between batches.
Applications: 

--coatings, inks: thickening, thixotropic, anti-settling, increase coating hardness, scratch resistance, etc.
-- powder coating: improve product fluidity and anti-caking performance;
-- adhesives: reinforcing, thickening, hydrophobic, rheology control;
--textile pulp: wear-resistant, reduce PVA dosage
-- defoaming agent: excellent hydrophobicity, dispersion and adsorption, enhance defoaming ability and improve defoaming efficiency.
-- rubber and latex: used as reinforcing filler to improve the mechanical properties of materials;
-- plastics, fibers and films: enhance, toughen, wear resistance and other functions to improve physical properties.
Nano silica can also be used in petroleum industry, ceramics, cement, paper making, catalyst, polishing, battery and so on.