Tribasic Lead Sulfate /TBLS

Product Overview

Tribasic Lead Sulfate is a high-performance, white crystalline powder primarily used as a heat stabilizer and lubricant in PVC processing. As one of the most effective and widely used lead-based stabilizers, it is renowned for its exceptional thermal and light stability, electrical insulation properties, and cost-effectiveness. It is particularly favored in applications where long-term heat aging resistance, electrical performance, and high-temperature processing stability are critical.

Key Specifications

Core Features & Benefits in PVC Processing

1. ‌Outstanding Thermal Stability‌: Provides excellent long-term heat aging resistance, effectively preventing PVC degradation and discoloration during high-temperature processing and in-service conditions.

2. ‌Superior Electrical Insulation‌: Ideal for PVC wire and cable applications due to its excellent dielectric properties, which help maintain high insulation resistance.

3. ‌Excellent Light Stability‌: Offers good protection against UV degradation, making it suitable for both indoor and outdoor applications where color retention is important.

4. ‌Intrinsic Lubrication‌: Acts as an internal lubricant, reducing melt viscosity and improving processing flow, which can enhance production efficiency and surface finish.

5. ‌Cost-Effective Performance‌: Delivers a high level of stabilization at a competitive cost, making it a preferred choice for many cost-sensitive, high-performance opaque applications.

Typical Applications

· ‌PVC Wire & Cable‌: Primary insulation and sheathing for power cables, building wires, and communication cables.

· ‌PVC Pipes & Conduits‌: For pressure pipes, drainage pipes, and electrical conduits.

· ‌PVC Profiles & Sheets‌: Window frames, siding, and other opaque rigid profiles and sheets.

· ‌Other Opaque PVC Products‌: Where high thermal stability and electrical properties are required.

Recommended Dosage

The typical addition level ranges from ‌2.0 to 6.0 phr‌ (parts per hundred resin), depending on the specific PVC formulation, processing conditions, and desired performance level.

· ‌General-purpose rigid PVC‌: 2.0 - 4.0 phr

· ‌High-temperature cable compounds‌: 4.0 - 6.0 phr
It is often used in combination with other lead-based stabilizers (e.g., dibasic lead phosphite, lead stearate) and lubricants to achieve optimal performance.

Packaging & Storage

· ‌Packaging‌: 25 kg net weight per multi-layer kraft paper bag with inner polyethylene liner.

· ‌Storage‌: Store in a cool, dry, well-ventilated warehouse. Keep containers tightly closed to prevent moisture absorption. Protect from direct sunlight and heat sources.

· ‌Shelf Life‌: 24 months from the date of manufacture when stored under recommended conditions.

Important Safety & Regulatory Notes

· ‌Hazard Classification‌: Contains lead. Classified as harmful if swallowed, inhaled, or absorbed through the skin. May cause damage to organs through prolonged or repeated exposure. Handle with appropriate personal protective equipment (PPE) including gloves, safety glasses, and dust masks/respirators. Ensure adequate local exhaust ventilation.

· ‌Regulatory Status‌: Subject to strict regulations (e.g., EU RoHS, REACH) restricting its use in certain applications, particularly in consumer electronics and other products. ‌It is not suitable for food contact, medical, or toys applications.‌ Users must ensure compliance with all applicable local and international regulations for their intended end-use.

· ‌Disposal‌: Dispose of waste and empty containers in accordance with all local, state, and federal regulations for hazardous waste containing lead.