Calcium Stearate
Calcium Stearate, a versatile compound in powder form, plays a crucial role across diverse industries. In plastics, it serves as both an internal and external lubricant, enhancing the processing efficiency of polymers by reducing friction and improving flow properties. The rubber industry benefits from Calcium Stearate as a mold release agent, preventing sticking during processing and ensuring smooth production. Known for its non-toxic and stable characteristics, Calcium Stearate is prized for its ability to improve processing conditions while maintaining product quality.
Functions and Characteristics
- Particle Size and Fineness: The high fineness, with more than 99.5% passing through a 0.075mm sieve in the premium grade, indicates a fine powder form. This ensures uniform dispersion in various applications, contributing to product quality.
- Calcium Content Precision: The precise calcium content in each grade (6.5±0.5%, 6.5±0.6%, 6.5±0.7%) reflects a high level of manufacturing control. This precision is vital for maintaining consistent performance in PVC stabilization and other applications.
- Free Acid (Stearic Acid) Control: The low free acid content of ≤0.5% is crucial for preventing acidity, ensuring the stability of the product. This is especially important in applications where the material comes into contact with sensitive products like food or medical appliances.
- Heating Loss Sensitivity: The heating loss parameter, with values ranging from ≤2.0% to ≤3.0%, indicates the material’s sensitivity to heat and moisture. Lower values signify better stability during processing and storage.
- Melting Point Range: The specified melting point range (149~155°C for premium grade) ensures the material’s effectiveness in applications where temperature stability is critical, such as PVC processing.
- Application Flexibility: The diverse applications, including stabilizing PVC, lubrication, non-toxic soft films, flatting agent, and grease paint thickening, showcase the material’s versatility in different industries.
- Appearance Standards: The characteristic white powder appearance not only signifies purity but also aids in visual quality control during manufacturing processes.
- Quality Grading System: The presence of premium, first-grade, and qualified categories establishes a clear quality hierarchy. This ensures that manufacturers can choose the specific grade that aligns with their application requirements.
Technical indicators: (HG/T 3667-2012)
| Items | Premium grade | First grade | Qualified |
| Appearance | White powder | ||
| Calcium content% | 6.5±0.5 | 6.5±0.6 | 6.5±0.7 |
| Free acid（stearic acid），%≤ | 0.5 | ||
| ≤Heating loss，%≤ | 2.0 | 3.0 | 3.0 |
| Melting point,℃ | 149~155 | ≥140 | ≥125 |
| Fineness (through0.075mm sieve) , %≥ | 99.5 | 99.0 | 99.0 |
Packing, storage and transportation: 25kg/ bag, stored in cool and ventilated place
Major Applications
Grease Paint Thickening Agent
Used as a thickening agent in the production of grease paint, enhancing the consistency and texture of the final product.
Pharmaceuticals and Cosmetics:
Employed in pharmaceuticals and cosmetics as a stabilizing and thickening agent in the formulation of certain products.
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