| Classification: | Calcium Carbonate Powder |
|---|---|
| Other CAS No.: | 471-34-1 |
| Application: | in Special Catalyst and Phosphors. |
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| Nano-calcium carbonate, due to its nano-size effect, large specific surface area, surface atoms in a highly activated state and a high interfacial interaction with the polymer, when added to the coating, the coating has a special modification function. Nano-calcium carbonate is used in anti-rock impact coatings and topcoats for automobile chassis due to its good thixotropy. |
| During the driving process, the bottom of the car and the wheel fenders are often washed by the impact of sand, gravel and sewage. Therefore, the paint applied to the surface of the substrate is easily damaged, and the corrosion resistance is lost. It will rust and wear out quickly. In order to solve this problem, it is necessary to apply underbody paint with sand and stone impact resistance and corrosion resistance to these parts. PVC plastisol is a kind of car chassis paint, which is mainly composed of PVC paste resin, plasticizer, filler (calcium carbonate), stabilizer, tackifier, solvent and other additives. The amount of calcium carbonate accounts for about 30% of the total components (the specific amount depends on the formula), and the addition of nano-calcium carbonate will greatly improve the rheological properties of the system and the membrane Impact resistance. |
| Automobile chassis paint requires easy spraying, low viscosity and good fluidity during the construction spraying process, and requires high viscosity after construction to prevent staining and sagging. This requires that the viscosity of the paint is significantly lower at high shear speeds, which can be easily sprayed and leveled; while at low shear speeds or at rest, it has high viscosity to prevent the paint from sinking and sag. This property is called thixotropy, and nano calcium carbonate products can meet this requirement in terms of construction performance and structural performance. |
| Nano-calcium carbonate for automotive car chassis paint (PVC plastisol) has the following characteristics: |
| (1) Has a high degree of activation |
| (2) Has a higher yield stress |
| (3) Has good thixotropy |
| Index | CaCO3 |
| Appearance | White Powder |
| Specific Gravity g / cm3 | 2.5-2.6 |
| Average Particle Size(nm) | 15-40 |
| Whiteness(%≥) | ≥95 |
| Bulk Density g / ml | 0.68 |
| Particle Shape | Cube |
| BET(m2/g) | ≥40 |
| PH (10g dissolved in 90ml water) | 8.5-9.5 |
| Moisture(%) | ≤0.5 |
| Oil Absorption Value(%) | ≤32 |
| Activation Rate%) | ≥98 |
| CaCO3(%) | ≥94.5 |
| LOI(%) | ≥46.5 |
| MgO(%) | ≤0.5 |
| Surface Treatment Agent | Compound Treatment |
| Packing: | 50KGs Iron Drum or 1000KGs Jumb Bag or packing as per request. |
| Storare: | Storing in sealed, dry and cool condition, not exposing to air for long time, avoiding moisture. |
| Characteristics: | Pink powder, slightly soluble in inorganic acid, insoluble in water. |
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