Nanfeng Modified Precipitated Barium Sulfate Ultrafine 2500 Mesh for Paints
Product Overview
Nanfeng Modified Precipitated Barium Sulfate Ultrafine 2500 Mesh is a cutting-edge, surface-functionalized barium sulfate engineered for premium paint systems demanding extreme fineness, chemical resistance, and optical precision. With a D50 particle size of 0.8–1.2 µm (ISO 13320) and 99.5% purity, this nano-enhanced filler sets new benchmarks for TiO₂ replacement efficiency (up to 35%), surface smoothness (Ra ≤0.05 µm), and weathering durability in automotive, industrial, and marine coatings.
Synthesized via patented Hydrothermal Nano-Precipitation technology and modified with organosilane coupling agents, this product delivers:
- Colloidal Stability: Zero sedimentation in solvent-borne systems after 90 days (ISO 1524).
- Reinforcement Properties: 20% improvement in pencil hardness (up to 4H, ASTM D3363).
- Halogen-Free Chemistry: REACH/RoHS/ELV compliant (Pb/Cd/As ≤1 ppm).
- Thermal Endurance: Stable up to 1,580°C, compatible with high-bake (160–200°C) curing processes.
Certified under ISO 9001, ISO 14064, and EcoVadis Gold standards, Nanfeng 2500 Mesh is the sustainable choice for formulators targeting VOC reduction, extended service life, and carbon-neutral production.
Key Features & Competitive Advantages
Optical & Surface Perfection
- Gloss Modulation: Achieves 5–80 GU @ 60° with 5–20% loading (vs. 10–30% for conventional BaSO₄).
- Hiding Power Boost: 1.02 contrast ratio (ASTM D2805) at 25% TiO₂ replacement.
- Orange Peel Elimination: DOI (Distinctness of Image) ≥90 in automotive clear coats.
Mechanical & Chemical Resilience
- Abrasion Resistance: 35% lower wear volume vs. unmodified BaSO₄ (Taber test, CS-17 wheel, 1kg/5,000 cycles).
- Salt Spray Resistance: 2,500+ hours without blistering (ASTM B117).
- Acid Rain Durability: ≤0.2% mass loss after 50 cycles of pH 3.5 H₂SO₄ spray (SAE J2334).
Formulation Intelligence
- Ultra-Low Oil Absorption (6–9 g/100g): Reduces resin demand by 18–25%, slashing VOC emissions.
- Thixotropy Control: Maintains Stormer viscosity at 85–95 KU (ASTM D562) with 0.5–1.5% rheology modifiers.
- Anti-Sag Performance: ≥150 µm wet film thickness without sagging (ASTM D4400).
Sustainability & Compliance
- Carbon-Neutral Manufacturing: 100% renewable energy-powered production.
- Closed-Loop Water System: 98% process water recycled.
- FDA Compliance: Meets 21 CFR 175.300 for indirect food contact coatings.
Technical Specifications
| Parameter | Specification | Test Method |
|---|---|---|
| Chemical Composition | ||
| BaSO₄ Purity | ≥99.5% | XRF (GB/T 2899-2008) |
| Moisture Content | ≤0.05% | Karl Fischer (ISO 760) |
| Physical Properties | ||
| Particle Size (D50) | 0.8–1.2 µm (2500 mesh) | Laser Diffraction (ISO 13320) |
| Specific Surface Area | 8–12 m²/g | BET (ISO 9277) |
| Specific Gravity | 4.3–4.4 g/cm³ | Pycnometer (ISO 787-10) |
| Surface Modification | ||
| Silane Content | 0.8–1.5% w/w | TGA (ISO 11358) |
| Hydrophobicity | Contact angle ≥120° | ASTM D7334 |
| Performance Data | ||
| pH (10% Slurry) | 6.5–7.5 | Potentiometric (ISO 787-9) |
| Conductivity | ≤50 µS/cm | DIN 53779 |
| LOI (1,000°C) | ≤0.1% | TGA (ISO 11358) |
Application-Specific Benefits
1. Automotive Coatings
- Basecoat Systems: Enhances metallic flake orientation (15% improvement in flip-flop effect).
- Electrocoat Primers: Improives throw power by 20% (GM 9505P test).
- Self-Healing Clearcoats: Reduces scratch visibility (85% recovery rate after 70°C/2h annealing).
2. Industrial & Marine Coatings
- Chemical Tank Linings: Withstands 30% HCl/NaOH exposure for 6 months (ISO 2812-1).
- Offshore Corrosion Protection: Passes NORSOK M-501 cyclic testing (-30°C to 150°C, 50 cycles).
- Powder Coatings: Achieves 98% transfer efficiency in tribo-charging systems.
3. Architectural Paints
- Exterior Wall Finishes: ΔE ≤0.8 after 5,000 hrs QUV-A (ASTM G154).
- Anti-Graffiti Coatings: ≥100 cleanings with ≤5% gloss loss (EN ISO 11998).
- Low-VOC Interior Paints: Meets EU Decopaint Directive (VOC ≤30 g/L).
4. Specialty Coatings
- Aerospace Topcoats: Reduces ice adhesion by 40% (SAE AMS 1424).
- 3D-Printed Coatings: Enables 10 µm layer resolution via enhanced rheology.
- EMI Shielding Paints: Achieves 60 dB attenuation at 1 GHz (ASTM D4935).
Production Process & Quality Control
- Raw Material Selection:
- High-purity barite ore (BaSO₄ ≥99%) and organic silanes (APTES/OTES).
- Hydrothermal Synthesis:
- BaCl₂ + H₂SO₄ → BaSO₄↓ at 120°C/3 bar (pH 4.0–4.5, 2-hour dwell).
- In-Situ Modification:
- Simultaneous silane grafting during crystallization for monolayer coverage.
- Nano-Milling:
- Wet grinding with 0.1mm YSZ beads to D97 ≤2 µm.
- Spray Drying:
- Low-temperature (80°C) drying to preserve surface functionality.
- Quality Assurance:
- SEM/TEM for particle morphology and dispersion analysis.
- XPS to verify silane coupling efficiency (≥85%).
- ICP-MS for ultra-trace heavy metals (Pb/Cd/As ≤1 ppm).
Competitive Comparison: Nanfeng 2500 Mesh vs. Alternatives
| Property | Nanfeng Modified BaSO₄ | Nano CaCO₃ | Fumed Silica |
|---|---|---|---|
| Particle Size (D50) | 0.8–1.2 µm | 0.4–0.8 µm | 5–50 nm |
| Oil Absorption | 6–9 g/100g | 20–28 g/100g | 200–300 g/100g |
| TiO₂ Replacement Rate | 25–35% | 8–12% | 5–10% |
| Cost Efficiency | $3,200–3,500/ton | $1,000–1,500/ton | $8,000–12,000/ton |
| Environmental Impact | Zero wastewater, carbon-neutral | Moderate CO₂ footprint | High energy intensity |
Why Choose Nanfeng 2500 Mesh?
- Nano-Technology Leadership: 40+ patents in surface modification and dispersion.
- Global Compliance: REACH, TSCA, KC Mark, and GHS-aligned SDS.
- Custom Solutions: Adjustable silane types (amino, epoxy, vinyl), D50 from 0.5–3 µm.
- Supply Chain Agility: 10,000-ton annual capacity, 21-day global delivery.
| Product Appearance | white powder |
| BaSO4 content | 98.0% min |
| 105 °C volatile matter | 0.14 max |
| Water soluble matter | 0.28 max |
| Fe | 0.0016 max |
| Whiteness | 97.5 min |
| Oil absorption | 22.7 |
| pH value | 7.7 |
| Fineness | 0.01 max |
| Sulfide content | / |
| D50 | / |
| Conductivity | / |
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| Company Name | Beijing TDD E-commerce Co., Ltd | البلد / المنطقة | China |
| نوع الأعمال | متجر عبر الإنترنت | حجم الشركة | 2000 |
| تأسس | December 18, 2014 | ||
| العنوان | Building No.3, Area 6, No.188, West of South Forth Ring Rd, Beijing, China | ||
| المنتجات الرئيسية | راتنج PVC ، PP ، PE ، Pet ، ثاني أكسيد التيتانيوم ، Pigment ، إطارات السيارات | ||
| International Commercial Terms(Incoterms): | FOB, CFR, CIF, FCA | ||
| Terms of Payment: | LC, T/T, D/P | ||
| Average Lead Time: | Peak Season Lead Time: one month, Off Season Lead Time: within 15 workdays | ||
| Number of Foreign Trading Staff: | 20~40 People | ||
| Main Markets: | Southeast Asia, Africa, Mid East | ||
| Nearest Port: | Tianjin,Qingdao,Shanghai | ||
| Import & Export Mode: | Have Own Export License | ||
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