Overview
Plastic paint high calcium powder is a refined calcium carbonate (CaCO3) additive designed to enhance the performance of plastic-based paints. It acts as a cost-effective filler, improving opacity, mechanical strength, and weathering resistance while reducing production costs. The powder is manufactured through controlled grinding or precipitation processes to achieve consistent particle size and purity. This material is widely adopted in coatings for its compatibility with polymers like PVC, acrylics, and polyurethanes. Its inert nature ensures minimal chemical interference with paint formulations, making it a preferred choice for industrial and decorative applications.
Physical and Chemical Properties
The powder exhibits a bright white color with a typical particle size range of 2-20μm, ensuring smooth integration into paint matrices. Its high calcium carbonate content (≥98%) contributes to superior whiteness and low oil absorption, which optimizes paint viscosity and coverage. Chemically inert, it resists reactions with solvents or resins in paint systems. The material decomposes at 825°C, releasing carbon dioxide, but remains stable under standard coating processing temperatures (below 200°C). Its insolubility in water makes it suitable for exterior applications where moisture resistance is critical.
Main Applications
Primary use includes plastic paints for construction (e.g., wall coatings, roof finishes) and automotive components, where it enhances UV resistance and reduces cracking. It also serves as an extender in industrial maintenance coatings for machinery and storage tanks. In decorative paints, the powder improves matting effects and texture uniformity. Beyond coatings, it is used in plastic masterbatch production to adjust rheological properties. Emerging applications include eco-friendly paints, where its low VOC emissions align with sustainability goals.
Safety and Storage
While non-hazardous, prolonged dust inhalation may cause respiratory irritation. Suppliers recommend using NIOSH-approved masks and ensuring adequate ventilation during bulk handling. Storage requires moisture-proof packaging (e.g., laminated bags) to prevent caking. Bulk containers should be kept sealed and away from acidic substances to avoid decomposition. Spills can be cleaned with water, but residue should not enter drainage systems due to potential sedimentation. Compliance with local environmental regulations for particulate matter is advised during transportation.
B2B Procurement Guide
Buyers should prioritize suppliers with ISO 9001 certification to guarantee consistent quality. Key specifications to verify include particle size distribution (via laser diffraction reports), whiteness (measured by Hunter Lab scale), and acid-insoluble content (ideally <0.5%). For large orders, negotiate pricing based on annual volume commitments. Coastal regions often offer logistical advantages due to proximity to calcium carbonate mining hubs. Sample testing with your paint formulation is recommended to assess compatibility before full-scale procurement. Spot prices fluctuate with limestone market trends; locking contracts during stable periods is advisable.
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