Jinsha Precipitated Silica Manufacturing Co., Ltd. is one of the leading manufacturers and suppliers of silicon dioxide for anti corrosive pigments in China. With abundant experience, we warmly welcome you to buy high quality products made in China here from our factory. Contact us for more details.
Silicon Dioxide For Anti Corrosive Pigments
In the anticorrosive coating formulation, silica is used as a thickening, thixotropic, and anti deposition additive， thickening, anti settling, suspension and so on.The filler and other additives can be uniformly dispersed in the resin, not precipitation phenomenon.Thixotropic effect of silica makes the coating has excellent anti sagging property and thickness of coating performance, improve the construction performance.
Mechanism of action: when the silicon dioxide is dispersed in non-polar liquid, the silanol groups on different particle surfaces form a bridge through hydrogen bond interaction, and the composition of this three-dimensional structure produces thickening effect. When the system is affected by the mechanical force, such as stirring or shaking, the structure damage, mechanical force type and duration effects determined by the extent of the damage, the result is the thickening system become liquid. If the stationary state is maintained, the silica particles will be joined together to restore the original viscosity. This phenomenon is known as pseudo plasticity.
Discription:
JS-260
No. | PHYSICO-CHEMICAL PROPERTIES | Data | TEST METHOD | UNIT |
1 | SiO2 Contents (dry basis) | ≥ 98 | HG/T 3062 | % |
2 | Appearance | White, Fine Odourless, Powder | Visual | / |
3 | Loss on Drying (105°C, 2h) | 4-7 | HG/T 3065 | % |
4 | Loss on Ignition (1000°C, 2h) | <6 | HG/T 3066 | % |
5 | PH Value | 6.0-7.5 | HG/T 3067 | / |
6 | Nitrogen adsorption specific surface area | 260-280 | GB/T 10722 | m²/g |
7 | Iron Contents | ≤400 | HG/T 3070 | mg/kg |
8 | DBP Oil Absorption Value | 2.9-3.5 | HG/T 3072 | cm³/g |
9 | Soluble Dissociated Salt | ≤2 | HG/T 3061 | mg/kg |
Packaging:
20KGS/PP BAG,900BAGS PER 40HQ UNPALLETIZED.
FAQ:
1.What is the application of hydrophobic silica？
Rheological agent: separant for emulsion, anti-settling agent for paints/coatings/inks/toners, thickening agent, thixotropic agent, anti-block agent for plastic film;
Powder glidant: for powder extinguishing agent and powder coats;
Granula agent and dispersion agent for pesticides;
Carrier for explosive;
Thickening agent for Adhesives and various kinds of polar liquid like epoxy resin;
Defoaming agent:
Abrasive agent for tooth paste;
Reinforcing agent for organic silica elastomer;
With the hydrophobic and anti-corrosion characteristics, the hydrophobic precipitated silica can also enhance the insulating property for cables and cords. And with the high reinforcement, the hydrophobic precipitated silica is widely used in the industrial plastic, modified plastic and silicon rubber.
2.What is hydrated silica?
Hydrated Silica (English name Hydrated Silica; Silicondioxidehydrate), also known as white carbon black , also known as light silica, the main component is silica, white amorphous powder. Light Loose, soluble in caustic and hydrofluoric acid, insoluble in water, solvents and acids (except hydrofluoric acid). High temperature, nonflammable, tasteless, odorless, with good electrical insulation. Its performance is similar to carbon black , but it is white.The molecular formula and the structural formula can be represented by SiO2 · nH2O, where nH2O is present as a surface hydroxyl group. Its macroscopic structure is similar to carbon black, the particles are spherical, single particles between the surface contact, was chain-like structure (secondary structure). Chain structure and hydrogen bond force to form a group of aggregates. The original particles are very fine, absorb moisture in the air to form aggregated fine particles. Silica particles on the surface of hydroxyl particles, mainly isolated hydroxyl, adjacent hydroxyl, silicon three (see Figure 2,3). Wherein the adsorption of polar groups from adjacent hydroxyl groups is important. The presence of these groups makes the silica surface has a strong hydrophilic, surface area and dispersion capacity are large, mechanical strength and tear resistance are high. High temperature does not decompose, high insulation, with small particles, large surface area, high structural characteristics. Mainly used for the rubber industry excellent light reinforcing agent, lubricants, insulation materials. Can be dilute sodium silicate solution and dilute hydrochloric acid reaction system
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