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 | Country/Region | China |
| Business Type | Online Store | Company Size | 2000 |
| Established | December 18, 2014 | ||
| Address | Building No.3, Area 6, No.188, West of South Forth Ring Rd, Beijing, China | ||
| Main Products | PVC Resin , PP , PE , Pet , Titanium Dioxide , Pigment , Car Tire | ||
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| Import & Export Mode: | Have Own Export License | ||
About Beijing United Information Technology Co., Ltd.
Beijing United Information Technology Co., Ltd. (Stock Code: 603613. SH), founded in 2002 and listed on the Main Board in July 2019, is mainly engaged in industrial e-commerce and industrial Internet platforms. Based on industrial e-commerce and supported by industrial big data and industrial digitalization, the company provides online commodity trading, business information services and digital technology services of industrial products and raw materials for related industries. In terms of business model, it is called "the industrial version of Pinduoduo" and "the industrial version of JD.com".
About Beijing TDD E-commerce Co., Ltd.
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Beijing TDD E-commerce Co., Ltd. (shortly named TDD Global) is the core subsidiary of Guolian Corporation (Stock Code: 603613.SH) and the first industrial Internetplatform of Duoduo Series Platforms. The company mainly engages in B28 e-commerce transaction serices of raw material and industrial products, digital supply chain serices, industrial digitalization serices and industrial big data serices, and is committed to promoting the deep integration of traditional industries and new technologies such as the Internet, Internet of Things, big data, intelligent manufacturing and block chain, etc.
Our company offers variety of products which can meet your multifarious demands. We adhere to the management principles of quot&quality first, customer first and credit-based"Since the establishment of the company and always do our best to satisfy potential needs of our customers.
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