Natural 1250 Mesh Sulfato de bario mate-Acabado no brillante para aplicaciones de pintura y recubrimiento

‌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.

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‌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

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‌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.

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‌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%.

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‌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

• ‌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.

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‌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

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‌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.

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‌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.

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‌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.

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‌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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