Product Overview
Calcium Stearate is a fine white, free-flowing powder widely used as a multifunctional additive across various industrial applications. It is non-toxic, hydrophobic, and insoluble in water, while exhibiting excellent lubricating properties and thermal stability.
Due to its chemical stability, cost-effectiveness, and versatility, calcium stearate is widely used in industries such as plastics, rubber, construction materials, coatings, pharmaceuticals, and paper processing.
The product functions primarily as a lubricant, heat stabilizer, mold release agent, and moisture-resistant additive, helping manufacturers improve processing efficiency and product performance.
Key Functional Benefits
Lubrication
Calcium stearate acts as an effective lubricant, reducing friction between materials during processing and molding operations. This improves material flow and enhances manufacturing efficiency.
Heat Stabilization
In plastic processing—particularly in PVC formulations—calcium stearate serves as a secondary heat stabilizer, helping prevent polymer degradation at elevated processing temperatures.
Water Repellency
Its hydrophobic nature allows calcium stearate to function as a moisture-resistant additive, improving water resistance in various industrial materials.
Mold Release Performance
Calcium stearate functions as a mold release agent, preventing materials from sticking to molds and facilitating smoother demolding processes.
Acid Neutralization
The compound can also act as an acid neutralizer, helping stabilize formulations by neutralizing acidic components in certain chemical processes.
Application Areas
Plastics Industry
Calcium stearate is widely used in PVC processing as both a heat stabilizer and internal lubricant.
Typical applications include:
- PVC pipes and fittings
- Electrical cables and insulation materials
- Window and door profiles
- Plastic sheets and films
It improves processing performance, surface finish, and thermal stability.
Rubber Industry
In rubber manufacturing, calcium stearate functions as a lubricant and mold release agent, helping improve the molding quality and processing efficiency of rubber products.
Construction Materials
Used in cement and concrete formulations, calcium stearate acts as a water-repellent additive or water-reducing agent, enhancing durability and resistance to moisture penetration.
Pharmaceutical and Food Applications
In pharmaceutical manufacturing, calcium stearate can be used as a tablet lubricant to improve tablet compression performance.
Certain grades are also used as food additives, subject to compliance with relevant food safety standards and regulations.
Coatings and Inks
Calcium stearate functions as a dispersing agent and smoothing additive, helping improve the texture, stability, and finish of coatings and printing inks.
Paper Industry
In paper processing, calcium stearate is used in paper coatings to enhance water resistance, smoothness, and printability.
Usage Guidelines
Calcium stearate is typically added in powder form and mixed with raw materials according to the specific formulation requirements.
Typical dosage ranges include:
Plastic Processing
- Usually 0.5% – 2% of the formulation
- Mixed with resin using a high-speed mixer before processing
Rubber Products
- Approximately 1% – 3%, depending on formulation requirements
Construction Materials
- Generally less than 1%, blended with cement or mortar mixtures
Pharmaceutical Applications
- Typically 0.5% – 2% added to powder formulations prior to tablet compression
Exact dosage levels may vary depending on processing method, material type, and desired performance characteristics.
Handling and Precautions
- Avoid excessive use, as high concentrations may affect mechanical properties or transparency, particularly in PVC products.
- In high-temperature PVC processing, calcium stearate is often used in combination with other stabilizers, such as lead-based or organotin stabilizers.
- Store the material in sealed packaging to prevent moisture absorption and caking.
- For food or pharmaceutical applications, ensure the product meets relevant regulatory standards such as FDA or other applicable food safety regulations.
