Tribasic Lead Sulfate (TBLS) Product Overview

📝 Product Overview

Tribasic Lead Sulfate (commonly known as TBLS) is one of the most widely used primary heat stabilizers for Polyvinyl Chloride (PVC) processing. With the chemical formula $3PbO\cdot PbS{O}_4\cdot H_{2}O$ and CAS number 12202-17-4, it is recognized for its exceptional thermal stability and superior electrical insulation properties.

TBLS acts by neutralizing the hydrogen chloride ($HCl$) released during the thermal degradation of PVC, effectively preventing the polymer from discolored or becoming brittle during high-temperature extrusion and molding. It is a cost-effective, high-performance stabilizer essential for long-life PVC products.

🔬 Key Specifications

• Appearance: White or slight yellow powder
• Lead Content ($PbO$): $88.0\mathrm{\%}\pm 1.0\mathrm{\%}$
• Free Lead Oxide ($PbO$): $\le 1.0\mathrm{\%}$
• Heating Loss (${105}^{\circ }\text{C}$): $\le 0.4\mathrm{\%}$
• Fineness (Passing 325 mesh): $\ge 99.5\mathrm{\%}$
• Initial Discoloration: Excellent
• Electrical Insulation: High resistivity
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🚀 Application Areas

① TBLS is particularly suited for opaque PVC products where durability, weather resistance, and electrical performance are critical.

PVC Wire and Cable: TBLS is the industry standard for electrical insulation. It provides excellent long-term heat stability and maintains the dielectric properties of cable sheathing and insulation compounds, especially for high-voltage and outdoor power cables.

② Rigid PVC Pipes and Profiles: In the production of water pipes, drainage pipes, and window profiles, TBLS ensures the structural integrity and color consistency of the material during high-shear extrusion processes.

③ PVC Sheets and Boards: Used in industrial PVC sheets and foam boards to provide a stable processing window and improve the mechanical strength of the final product.

④ Synthetic Leather and Floor Tiles: TBLS helps in maintaining the flexibility and surface finish of PVC-based leather and heavy-duty floor tiles exposed to heat during manufacturing.

⑤ Opaque Soft Products: It is effective in various flexible PVC applications such as garden hoses, gaskets, and industrial belts where transparency is not required.

📦 Packaging and Storage

• Packaging: Typically supplied in 25 kg plastic woven bags with an inner PE liner, or craft paper bags. Bulk ton-bag packaging is available for large-scale industrial use.
• Storage: Store in a cool, dry, and well-ventilated area away from acids and moisture. Ensure the bags are tightly sealed to avoid dust dispersion.
• Shelf Life: 12 months under standard storage conditions.