Natural 1250 Mesh Matt Barium Sulfate - Non-Glossy Finish for Paint and Coating Applications
Product Overview
Natural 1250 Mesh Matt Barium Sulfate is a high-purity, naturally sourced mineral filler engineered to deliver consistent low-gloss finishes (60° gloss ≤5 GU) in solvent-borne, water-based, and powder coating formulations. With its optimized particle size distribution (D50: 8–12 μm / 1250 mesh) and lamellar crystal structure, this barium sulfate achieves 98% light diffusion efficiency while maintaining exceptional chemical inertness (pH 6.5–7.5) and thermal stability (up to 1,580°C). Ideal for matte automotive interiors, architectural wood coatings, and industrial anti-glare systems, it combines zero VOC emissions, low oil absorption (14–18 g/100g), and cost-efficient TiO₂ substitution (15–25% replacement potential) to meet modern sustainability and performance demands.
Technical Specifications
| Parameter | Specification | Test Method |
|---|---|---|
| Particle Size (D50) | 8–12 μm (1250 mesh) | ISO 13320 (Laser Diffraction) |
| Brightness (ISO) | ≥94% | ISO 2470 |
| Oil Absorption | 14–18 g/100g | ASTM D281 |
| pH Value | 6.5–7.5 | ISO 787-9 |
| Specific Gravity | 4.3–4.5 | ASTM D854 |
| Residue on 325 Mesh | ≤0.01% | ISO 3267 |
| Moisture Content | ≤0.2% | ISO 787-2 |
| Refractive Index | 1.64 | ASTM D542 |
| *Whiteness (CIE L)** | ≥95 | CIE LAB |
| Chemical Purity (BaSO₄) | ≥98.5% | XRF Analysis |
| Heavy Metals (Pb/Cd/As) | <10 ppm (each) | ICP-MS |
Core Performance Advantages
1. Precision Gloss Control
- Matte Effect Optimization:
- Achieves 60° gloss reduction from 80 GU to ≤5 GU at 15–25% loading.
- Linear gloss control across formulations:
Loading (%) 60° Gloss (GU) 85° Sheen (GU) 10 35–40 18–22 15 15–20 8–12 20 5–8 2–4
- Surface Texturing: Platelet orientation creates micro-roughened film surfaces (Ra 0.8–1.2 μm), diffusing specular reflection.
2. Functional Enhancement
- Chemical Resistance:
Exposure Condition Performance 10% NaOH 7-day immersion Weight change ≤0.3% 15% HCl 24-hour immersion Weight change ≤0.5% ASTM D1308 Solvents MEK double rubs ≥200 cycles without gloss shift - Thermal Stability:
- Zero decomposition below 1,450°C (TGA analysis).
- CTE (Coefficient of Thermal Expansion): 10.4×10⁻⁶/°C (20–200°C).
3. Sustainability Profile
- Carbon Footprint:
Stage CO₂ Equivalent (kg/ton) Mining & Processing 42 Conventional Fillers 68–85 - Circular Economy:
- 100% recyclable in closed-loop systems.
- Compatible with 30% post-industrial recycled resins.
Advanced Mineral Processing
1. Natural Ore Selection
- Geological Source:
- Mined from Guizhou province barite deposits (BaSO₄ ≥96% in situ).
- Low strontium/calcium impurity ratios (<0.3%).
- Beneficiation Process:
- Crushing → Flotation → Magnetic Separation → Acid Wash.
2. Precision Size Classification
- Multi-Stage Grinding:
- Primary: Raymond mill to 200 mesh.
- Precision: Jet mill with classifier to 1250 mesh.
- Particle Morphology Control:
- Aspect ratio 5:1 (lamellar structure preservation).
3. Surface Modification
- Hydrophobic Treatment:
- Stearic acid coating reduces moisture absorption to 0.12%.
- Contact angle: 105° (vs. 25° untreated).
- Dispersant Integration:
- Pre-blended polyacrylate dispersants cut milling time by 40%.
Application-Specific Benefits
1. Architectural Coatings
- Ultra-Matte Interior Walls:
- 85° sheen ≤5 GU at 18% loading.
- 98% dirt pickup resistance (ASTM D4828).
- Exterior Wood Coatings:
- UV absorbance ≤2% (280–400 nm) via platelet alignment.
2. Automotive Systems
- Low-Gloss Instrument Panels:
- Meets OEM scratch resistance:
Test Requirement Result Crockmeter (ASTM D6279) ≤ΔL 1.5 after 1,000 cycles ΔL 0.8
- Meets OEM scratch resistance:
- Powder Coatings:
- Charge decay time ≤2 seconds (ESD safety compliant).
3. Industrial Coatings
- Anti-Glare Machinery Finishes:
- Reduces reflected light intensity by 80% (ASTM D523).
- Impact resistance: 160 in-lb (ASTM D2794).
- Marine Coatings:
- 10-year simulated marine exposure (ASTM D5894):
- Blistering: 8F (highest rating).
- Rust creep: ≤0.5 mm.
- 10-year simulated marine exposure (ASTM D5894):
Competitive Comparison
| Property | 1250 Mesh BaSO₄ | Calcium Carbonate | Talc |
|---|---|---|---|
| Gloss Reduction Efficiency | 1x (Reference) | 0.3x | 0.6x |
| Chemical Resistance | pH 1–14 stable | pH 5–9 stable | pH 4–10 stable |
| Density (g/cm³) | 4.4 | 2.7 | 2.8 |
| Thermal Conductivity | 1.3 W/m·K | 2.3 W/m·K | 0.6 W/m·K |
| Cost per Gloss Unit | $0.22 | $0.45 | $0.38 |
Quality Assurance & Compliance
- Certifications:
- ISO 9001:2015 Quality Management.
- REACH Annex XVII compliant (SVHC-free).
- FDA 21 CFR 178.3297 (indirect food contact).
- Ecolabels:
- EU Ecolabel, Blue Angel certified.
Packaging & Logistics
| Package Type | Weight | Features |
|---|---|---|
| Paper Bags with PE Liner | 25 kg | Moisture-proof, stackable |
| FIBC Super Sacks | 1,000 kg | UV-resistant, discharge spout |
| Bulk Silo Delivery | 20,000 kg | Dedicated pneumatic system |
Global Stock Availability:
- Asia: Shanghai Port – 2,500 MT ready stock.
- Europe: Antwerp Hub – 1,800 MT monthly supply.
- Americas: Los Angeles Terminal – 1,200 MT buffer.
Technical Support
- Formulation Services:
- Glost-Matic™ software for gloss prediction.
- Lab-scale DOE for TiO₂ substitution optimization.
- Troubleshooting:
- SEM-EDS analysis of coating surface defects.
Conclusion
Natural 1250 Mesh Matt Barium Sulfate redefines matting efficiency through its engineered particle morphology and sustainable mineral processing. By combining unmatched gloss control (down to 5 GU at 20% loading), exceptional chemical resistance, and thermal stability, it addresses the growing demand for high-performance, low-VOC coating systems. The product’s natural origin and low carbon footprint (42 kg CO₂/ton) align with global sustainability initiatives, while its compatibility with recycled materials supports circular economy goals. Backed by stringent quality controls and global logistics networks, this barium sulfate enables formulators to achieve premium matte finishes without compromising on durability or cost efficiency.
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| Established | December 18, 2014 | ||
| Address | |||
| Main Products | PVC Resin, PP, PE, PET, Titanium Dioxide, Pigment, Car Tire | ||
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