Overview
Polypropylene wax (PP wax) is a byproduct of polypropylene polymerization or synthesized via controlled degradation of polypropylene. It serves as a multifunctional additive in industrial applications due to its low molecular weight and waxy characteristics. Unlike natural waxes, PP wax offers superior thermal stability and compatibility with synthetic polymers, making it a preferred choice for high-temperature processing. Its synthetic origin allows precise control over properties like melting point and viscosity.
Physical and Chemical Properties
PP wax exhibits a melting point range of 140–160°C, ensuring stability during plastics extrusion or injection molding. Its low density (0.89–0.91 g/cm³) and insolubility in water make it suitable for hydrophobic formulations. The wax’s narrow molecular weight distribution contributes to consistent performance as a lubricant. It also demonstrates excellent dispersion properties, reducing pigment agglomeration in coatings and masterbatches.
Main Applications
In plastics, PP wax acts as an internal/external lubricant, improving flow and reducing friction during processing. It is critical in PVC, polyolefins, and engineering plastics. The coatings industry utilizes PP wax to enhance scratch resistance and matting effects. In rubber and adhesives, it functions as a processing aid and release agent. Additionally, it serves as a carrier for pigments in printing inks.
Safety and Storage
PP wax is generally safe but requires precautions to avoid dust inhalation or eye contact. Use gloves and goggles during handling, and ensure adequate ventilation in workspaces. Store in sealed containers below 30°C to prevent caking. Avoid contact with strong oxidizers, as thermal decomposition may release flammable gases. Spills should be cleaned with inert absorbents.
B2B Procurement Guide
Buyers should specify technical parameters like melt viscosity (commonly 100–500 mPa·s at 140°C) and acid value (<1 mg KOH/g for neutral grades). Bulk purchases (1-ton pallets) typically offer cost savings of 10–15%. Verify supplier certifications (e.g., REACH, FDA compliance for food-contact applications). Sample testing is recommended to assess compatibility with target formulations. Spot prices fluctuate with propylene feedstock costs.
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