Silica sol, Used as the cohesive agent for various fireproof materials.
Silica solCharacteristicsSilica sol belongs to colloid. It is odorless, tasteless and nontoxic. Its chemical molecular formular is mSiO2.nH2O.Since the colloid grains are minute (10-20nm) and have relatively large specific surface area, the grains themselves are colorless and transparent, so they do not affect the natural color of the materials to be covered.With low viscosity, it can soak the places where water soaks, therefore, it presents excellent dispersion and permeability when being mixed with other substances.When the moisture contained in silica sol are evaporated, the colloid grains firmly adhere to the material surface and the combination of silicon and oxygen is then formed between grains. It is a good adhesive. UseUsed as the cohesive agent for various fireproof materials. It has high bonding strength and high heat-resisting performance (1500-1600), etc.
| ITEM | Basic sodium type | Acidic non-stabilizer type | Typical values |
| JN--20 | JN--25 | JN--30 | JN--40 | SW--20 | SW--25 | SW--30 | JN--25 | SW--25 |
| SiO2, % | 20.0-21.0 | 25.0-26.0 | 30.0-31.0 | 40.0-41.0 | 20.0-21.0 | 25.0-26.0 | 30.0-31.0 | 30.3 | 25.6 |
| Na2O, % ≤ | 0.30 | 0.30 | 0.30 | 0.40 | 0.04 | 0.05 | 0.06 | 0.25 | 0.04 |
| pH value | 8.5-10.0 | 8.5-10.0 | 8.5-10.0 | 9.0-10.5 | 2.4-4.0 | 2.4-4.0 | 9.6 | 2.8 |
| Viscosity (25),mp a.s ≤ | 5.0 | 6.0 | 7.0 | 25.0 | 5.0 | 6.0 | 7.0 | 5.4 | 3.0 |
| Density (25),g/cm3 | 1.12-1.14 | 1.15-1.17 | 1.19-1.21 | 1.28-1.30 | 1.12-1.14 | 1.15-1.17 | 1.19-1.21 | 1.20 | 1.16 |
| Average particle diameter,nm | 10-20 | 10-20 | 10-20 | 10-20 | 10-20 | 10-20 | 10-20 | 11 | 10 |
[Term of validity] One year for the alkali based, half a year for the acid based. [Packaging]250kg per HDPE drum, 1,250kg IBC tank. [Conditions for storage and transportation] Maintain 0-40 during storage and transportation to avoid freezing of exposing to the sun.
Silica sol
