Product Introduction & Main Application
Arnico’s Calcium Carbonate (CaCO₃) is a high-purity, white mineral filler available in two distinct forms: uncoated (natural ground) and coated (surface-treated with stearic acid). It serves as a cost-effective performance enhancer, improving the mechanical properties, opacity, and surface finish of end products. The coated grade is specifically designed for superior dispersion and hydrophobicity in plastics, rubber, and solvent-based systems, while the uncoated grade is ideal for water-based paints, paper, and construction materials.
2. Technical Specifications
| Technical Parameter | Uncoated Grade (NC-325) | Coated Grade (CC-1250) | Unit |
|---|---|---|---|
| CaCO₃ Purity | ≥ 98.5 | ≥ 98.5 | % |
| Whiteness (R457) | ≥ 96 | ≥ 96 | % |
| Average Particle Size (D₅₀) | 10 – 15 | 2 – 3 | µm |
| Moisture Content | ≤ 0.3 | ≤ 0.2 | % |
| Stearic Acid Coating | 0 | 1.0 – 1.5 | % |
| Specific Gravity | 2.7 | 2.7 | g/cm³ |
3. Features & Benefits
Enhanced Dispersion (Coated Grade): The stearic acid layer reduces agglomeration and provides excellent compatibility with polyolefins (PE, PP) and PVC, leading to a smoother surface finish.
High Whiteness & Opacity: Elevates the brightness and covering power of paints, coatings, and paper, reducing the need for expensive TiO₂.
Improved Mechanical Properties: Increases the stiffness, impact resistance, and dimensional stability of plastic parts and profiles.
Cost Efficiency: A high-performance extender that significantly lowers the raw material cost per kilogram of the final compound.
Chemical Inertness: Provides excellent resistance to acids, alkalis, and weathering, ensuring long-term product durability.
4. Industrial Applications
Masterbatch & Plastics: Functional filler in PE, PP, and PVC masterbatches for blown film, injection molding, and pipe extrusion.
Paints & Coatings: Primary extender pigment in architectural, industrial, and traffic paints.
Adhesives & Sealants: Rheology modifier and filler in tile adhesives, mastics, and silicone sealants.
Paper Manufacturing: Filler and coating pigment to improve paper brightness, opacity, and printability.
5. Safety & Handling
MSDS (Material Safety Data Sheet): This product is considered a nuisance dust. The complete MSDS file is available on the Arnico support portal.
Storage Conditions: Store in a dry, covered warehouse. Keep bags sealed, away from moisture, and stacked on pallets to prevent caking.
Personal Protective Equipment (PPE): Use a certified dust mask (N95), safety goggles, and work gloves during handling to prevent dust inhalation and skin contact.
6. Quality Assurance & COA
All Arnico Calcium Carbonate shipments include a detailed Certificate of Analysis (COA) confirming purity, whiteness, particle size distribution, and coating percentage, ensuring batch-to-batch consistency for your critical formulations.
