Wufeng Weitai Bull Barium Sulfate WT-138 for Rubber and Plastic Applications
Product Overview
Wufeng Weitai Bull Barium Sulfate WT-138 is a specialized extinction-grade barium sulfate engineered to deliver exceptional matting performance, high filler loading capacity, and enhanced coating durability in powder coating applications. With a precisely controlled particle size distribution (700 mesh / ~20 µm) and a whiteness level of 83% (ISO 2470), this product optimizes surface aesthetics while reducing formulation costs by enabling 20–30% higher filler incorporation compared to conventional talc or silica matting agents.
Sourced from natural high-purity baryte ore in Wufeng Tujia Autonomous County, Hubei Province, and processed through advanced micronization technology, WT-138 combines chemical inertness with outstanding weather resistance. Its unique particle morphology ensures:
- Uniform Light Diffusion: Achieves consistent matte finishes (60° gloss: 15–30 GU) without haze or surface defects.
- Suspension Stability: Zero sedimentation in resin systems due to matched density (4.3 g/cm³) and optimized rheology.
- Broad Compatibility: Seamless integration with epoxy, polyester, polyurethane, and hybrid powder coating resins.
Certified under ISO 9001 and RoHS, WT-138 is the ideal choice for formulators seeking to balance cost efficiency with premium coating performance in automotive, architectural, and industrial applications.
Key Features & Competitive Advantages
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Superior Matting Performance
- High Extinction Efficiency: Reduces gloss by 50–70% at 10–15% loading (vs. 20–25% for calcium carbonate).
- Surface Smoothness: Minimizes orange peel effect via monodisperse particle distribution (PDI <0.25).
- UV Stability: Maintains color fidelity after 1,000+ hours of QUV-B exposure (ASTM G154).
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Formulation Flexibility & Cost Savings
- High Loading Capacity: Up to 40% filler incorporation without compromising flow or curing kinetics.
- TiO2/Resin Reduction: Low oil absorption (18–22 g/100g) cuts resin demand by 12–15%.
- Process Optimization: Reduces extrusion torque by 10–18% in twin-screw compounding (ASTM D2538).
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Enhanced Coating Durability
- Chemical Resistance: Withstands acids (pH 2), alkalis (pH 12), and solvents (MEK rubs >100 cycles).
- Abrasion Resistance: Improves Taber abrasion resistance by 25% (ASTM D4060) at 20% loading.
- Thermal Stability: No decomposition below 1,500°C, ideal for high-bake powder coatings.
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Sustainable & Safe
- Natural Mineral Base: Heavy metal content ≤10 ppm (Pb/Cd/As) compliant with EU REACH.
- Low Carbon Footprint: 30% lower CO₂ emissions vs. synthetic barium sulfate.
- Dust-Free Handling: OSHA-compliant granulation with ≤0.3% respirable particles.
Technical Specifications
| Parameter | Specification | Test Method |
|---|---|---|
| Chemical Composition | ||
| BaSO4 Purity | ≥98.0% | XRF Analysis (ISO 29581) |
| Moisture Content | ≤0.5% | ISO 787-2 |
| Physical Properties | ||
| Particle Size (D50) | 18–22 µm (700 mesh) | Laser Diffraction (ISO 13320) |
| Specific Gravity | 4.2–4.4 g/cm³ | ISO 787-10 |
| Whiteness (ISO) | 83 ± 1% | ISO 2470 |
| Performance Data | ||
| Oil Absorption | 18–22 g/100g | ISO 787-5 |
| pH (10% Aqueous Slurry) | 6.5–7.5 | ISO 787-9 |
| LOI (1,000°C) | ≤0.5% | TGA (ISO 11358) |
Applications
WT-138 is engineered for excellence in powder coatings across industries:
1. Architectural Powder Coatings
- Facade Panels: Provides uniform matte finishes with Class A fire resistance (ASTM E84).
- Aluminum Profiles: Enhanges adhesion and corrosion resistance in outdoor applications.
- Anti-Graffiti Coatings: Facilitates easy cleaning without gloss alteration.
2. Automotive & Transportation
- Wheel Rims: Improves chip resistance and thermal cycling performance (-40°C to 200°C).
- Engine Components: Withstands oil, grease, and high-temperature exposure.
- Interior Trims: Halogen-free matting for low-VOC compliance.
3. Industrial Equipment
- Agricultural Machinery: Resists UV degradation and chemical fertilizers.
- HVAC Systems: Anti-static properties (surface resistivity: 10⁹–10¹¹ Ω/sq).
- Electrical Enclosures: Flame-retardant grades (UL94 V-0 achievable).
4. Consumer Goods
- Appliances: Scratch-resistant finishes for refrigerators and ovens.
- Furniture: Low-temperature cure compatibility (120–140°C).
- 3D Printing: Rheology modifier for powder bed fusion (PBF) processes.
Production Process & Quality Control
- Ore Selection: Natural baryte ore with ≤10 ppm heavy metals (XRF verified).
- Crushing & Grinding: Jaw crushers → Raymond mills → 200-mesh pre-refinement.
- Purification: Froth flotation (acid-free) to remove silica/iron impurities.
- Micronization: Wet grinding with zirconia beads to 700 mesh fineness.
- Surface Modification: Stearic acid coating for hydrophobic dispersion.
- Drying & Classification: Spray drying + air-jet sieving (D100 ≤ 30 µm).
- Quality Assurance:
- ICP-MS for heavy metals (Pb/Cd/As <10 ppm).
- SEM analysis for particle morphology.
- Batch-wise ISO 9001 certification.
Why Choose Wufeng Weitai WT-138?
-
Technical Excellence
- Patented grinding technology for ultra-uniform particle distribution.
- Customizable surface treatments (silane, titanate, or non-ionic).
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Resource & Cost Advantages
- Vertically integrated mining-to-production chain ensures price stability.
- 50,000-ton annual capacity with rapid lead times (7–10 days).
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Sustainability Commitment
- 85% process water recycling and 60% renewable energy usage.
- Zero-waste production with 99% raw material utilization.
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Customer-Centric Service
- Free sample testing and formulation optimization support.
- 24/7 technical assistance for extrusion, curing, and gloss control.
Competitive Comparison: WT-138 vs. Alternatives
| Property | WT-138 Barium Sulfate | Calcium Carbonate | Precipitated Silica |
|---|---|---|---|
| Matting Efficiency | High (15–30 GU at 10% loading) | Moderate (30–50 GU) | High (10–25 GU) |
| Chemical Resistance | Excellent (pH 2–12) | Good (pH 5–9) | Poor (pH 6–8) |
| Thermal Stability | 1,500°C | 800°C | 1,200°C |
| Cost per Ton | $420–450 | $200–250 | $1,200–1,500 |
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