1. Dibasic Lead Phosphite (DBLP) Product Overview
2. 
   

📝 Product Overview

Dibasic Lead Phosphite (commonly known as DBLP) is a high-performance primary heat stabilizer for Polyvinyl Chloride (PVC) processing. With the chemical formula $2PbO\cdot PbHP{O}_3\cdot 1\mathrm{/}2H_{2}O$ and CAS number 12141-20-7, it is uniquely valued for combining exceptional thermal stability with outstanding weather resistance and antioxidant properties.

Unlike standard lead stabilizers, DBLP provides superior UV shielding, making it the preferred choice for outdoor PVC applications. It works by neutralizing hydrogen chloride ($HCl$) and reacting with peroxides to prevent the oxidative degradation of the polymer chain, ensuring long-term structural integrity and color retention.

🔬 Key Specifications

• Appearance: White or slight yellow powder
• Lead Oxide Content ($PbO$): $83.5\mathrm{\%}\pm 1.0\mathrm{\%}$
• Phosphite Content ($P_2{O}_3$): $\ge 12.0\mathrm{\%}$
• Heating Loss (${105}^{\circ }\text{C}$): $\le 0.4\mathrm{\%}$
• Fineness (Passing 325 mesh): $\ge 99.5\mathrm{\%}$
• Refractive Index: 2.25 (provides excellent UV shielding)
• Density (g/cm³): 6.1
• 
  

🚀 Application Areas

DBLP is specifically designed for PVC products that require high durability and protection against environmental stress.

① Outdoor PVC Profiles and Siding: DBLP is essential for window frames, siding, and outdoor decorative panels. Its UV-shielding capability prevents "yellowing" and surface cracking caused by prolonged exposure to sunlight and harsh weather.

② High-Durability Electrical Cables: Used in high-voltage outdoor power cables and telecommunication lines. DBLP ensures that the insulation remains flexible and stable even under the combined stress of heat and environmental oxidation.

③ Rigid Pipes and Fittings: In agricultural irrigation pipes and outdoor drainage systems, DBLP provides the thermal stability needed for high-speed extrusion while protecting the pipes from aging due to outdoor exposure.

④ Synthetic Leather and Floor Mats: Integrated into PVC-based synthetic leather for automotive and marine upholstery, where resistance to UV light and oxidative heat is crucial for maintaining a "new" look.

⑤ Opaque Flexible Products: Applied in industrial hoses, gaskets, and seals that operate in outdoor or high-heat industrial environments where standard stabilizers might fail.

📦 Packaging and Storage

• Packaging: Typically supplied in 25 kg plastic woven bags with an inner moisture-proof PE liner, or craft paper bags. Bulk ton-bags are available for high-capacity industrial users.
• Storage: Store in a cool, dry, and well-ventilated warehouse. Keep away from fire and strong oxidizing agents. Ensure bags are sealed to prevent dust dispersion and moisture absorption.
• Shelf Life: 12 months under standard storage conditions.