The nano-scale silica particles with a narrow size distribution of 8-12 nm form a dense protective film on the coating surface, increasing the coating's hardness by up to 30% and extending its weather resistance. Its optimized pH and viscosity ensure excellent compatibility with common water-based resins, allowing for easy incorporation during coating production without requiring additional process adjustments. The product meets strict environmental protection standards, making it a sustainable choice for modern coating manufacturers. It also improves the adhesion of coatings to metal and wood substrates, reducing the risk of peeling and flaking over time, and enhances the stain resistance of coated surfaces.
Detailed specifications are as follows: SiO2 content of 25.0±0.5 wt%, average particle size of 8-12 nm, Brookfield viscosity of 7-13 mPa·s at 25℃ using RV spindle 3, pH value ranging from 8.2 to 9.8, density between 1.17-1.19 g/cm³, lead content less than 5 ppm, cadmium content less than 0.1 ppm, available in packaging options of 25kg food-grade plastic drums or 1000kg IBC totes, storage temperature of 0-40℃, and a shelf life of 18 months when stored in a cool, dry place, avoiding freezing conditions. The product has a neutral to slightly alkaline pH, making it compatible with most common coating additives and thickeners, and does not alter the rheological properties of the final coating mixture.
This coating-grade silica sol is suitable for a wide range of applications including interior and exterior wall latex paints, industrial anti-corrosion coatings for metal substrates, wood coatings for furniture and flooring, paper coatings for packaging, and textile coatings. It is particularly effective in high-performance coating products that require long-term weather resistance and scratch resistance, such as exterior building coatings and heavy-duty industrial coatings for machinery and equipment. It is also used in the production of water-based ink coatings, improving the printability and scratch resistance of printed materials, and in the manufacturing of architectural glass coatings to enhance durability and clarity.
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