PVC Composite Heat Stabilizer (Special for Profiles)SD-PB40

Model: SD-PB40

Widely applied in rigid PVC co-extruded profiles, door & window profiles, outdoor weather-resistant plastic-steel profiles and various decorative extruded profiles

1. Product Description

SD-PB40 is a composite lead salt heat stabilizer. Its primary stabilizing components are tribasic lead sulfate, dibasic lead phosphite and lead stearate, compounded with multiple imported high-efficiency internal & external lubricants and synergistic additives. It is developed for high-speed twin-screw extrusion of UPVC door and window profiles. This product delivers excellent long-term thermal stability and strong resistance to thermal degradation under high extrusion temperature. Its graded lubrication system matches profile extrusion requirements with controllable gelation, stable extrusion torque and high melt strength. It features good compatibility with other additives. Extruded profiles obtain high surface gloss and outstanding weather resistance, suitable for white and light-coloured plastic-steel door & window profiles.

2. Typical Technical Specifications

Note: The above are typical values and shall not be taken as minimum specifications. Indicators vary among different grades.

3. Recommended Dosage

Base: 100 phr PVC resin (SG-5) Recommended loading: 4.2 ~ 5.5 phr

• High-filled, co-extruded, high weather-resistant outdoor profiles: 4.8～5 phr Adjust according to TiO₂ dosage, filler loading, extruder type, line speed and weathering & colour requirements.

4. Processing Guidance

End Products: UPVC door & window profiles, co-extruded plastic-steel profiles, decorative extruded profiles Processing Temperature Range: 170 ~ 195 ℃

Key Features: Long-term heat resistance, anti-yellowing, balanced controllable lubrication, stable extrusion torque, high melt strength, excellent surface gloss, outdoor ageing resistance, low migration & low precipitation. Optimized for twin-screw high-speed extrusion, reduces cleaning shutdown and ensures stable continuous production.

5. Packaging, Storage and Shelf Life

Packing: 25 kg per bag, PP woven sack with PE inner liner

Storage Conditions: Store in cool, dry and ventilated warehouse. Protect from moisture, direct sunlight, acidic materials, strong oxidants and sulphides. Reseal immediately after opening to prevent moisture absorption and caking.

Shelf Life: 12 months when stored properly with intact original packaging.

6. Safety, Health and Environmental Information

This product contains toxic lead compounds. Dust inhalation must be avoided during all handling operations. Dust respirator, acid & alkali resistant gloves and goggles are mandatory. Avoid direct skin and eye contact. No eating, drinking or smoking in the working area. In case of eye contact, flush thoroughly with plenty of clean water continuously and seek medical attention promptly. Collect spillage separately by dry sweeping and dispose in accordance with local hazardous waste regulations. Separate SDS (Safety Data Sheet) is available upon request.

⚠️ Notice: Contains lead. Avoid contact with sulphides to prevent blackening of finished products. Not applicable for RoHS-compliant, lead-free or food-contact articles.

7. Disclaimer

All data contained in this data sheet are typical reference values and do not constitute a legally binding quality warranty. Due to differences in customer formulations, raw material quality, processing equipment and process parameters, users must carry out formulation trials and production verification in advance to confirm suitability. The final performance of the product shall be determined by the user’s actual production conditions.