Hengrui Brand Kaolin 4000mesh K-80 Ultra Fine Powder for Paints
Product Overview
K-80 represents a premium-grade calcined kaolin engineered through optimized thermal processing to achieve superior performance characteristics in coating formulations. This lamellar-structured anhydrous aluminum silicate (Al₂SiO₅) powder is specifically designed to enhance both the functional and economic parameters of paint systems while maintaining exceptional quality standards.
Manufacturing Excellence
Precision calcination at 1050-1150°C for optimal crystal phase transformation
Advanced air classification technology ensuring consistent particle morphology
Proprietary surface modification for improved resin compatibility
Rigorous quality control at every production stage
Key Technical Parameters
Whiteness Index: 94-96% (ISO 2470-20 standard)
Particle Size Distribution:
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D50: 1.0-1.5μm
D90: <4.5μm
325 Mesh Residue: ≤0.01%
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Oil Absorption: 30-40g/100g (ASTM D281)
Specific Surface Area: 12-18 m²/g (BET method)
Refractive Index: 1.62
Chemical Composition
SiO₂: 53±1%
Al₂O₃: 45±1%
Fe₂O₃: ≤0.4%
TiO₂: ≤0.2%
LOI (1000°C): ≤0.5%
Performance Advantages in Coating Systems
TiO₂ Extension Efficiency:
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Achieves 20-30% replacement of titanium dioxide
Maintains 95% of original opacity
Reduces raw material costs by 12-18%
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Enhanced Film Properties:
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50-60% improvement in scrub resistance (ASTM D2486)
40% increase in crack resistance
Superior salt spray resistance exceeding 1000 hours (ASTM B117)
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Optical Performance:
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Excellent matting efficiency (60° gloss reduction up to 30%)
Improved dry hide characteristics
Enhanced color consistency
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Technical Comparison with Conventional Fillers
| Property | K-80 | Standard Kaolin | Calcium Carbonate |
|----------|------|----------------|-------------------|
| TiO₂ Extension | 25% | 10% | 5% |
| Scrub Resistance | +55% | +20% | +15% |
| Oil Absorption | 35g/100g | 60g/100g | 20g/100g |
| Salt Spray Resistance | Excellent | Good | Fair |
| Cost Saving Potential | High | Moderate | Low |
Mechanism of Action
Lamellar structure creates tortuous path for corrosive elements
Optimized particle packing improves film integrity
Surface chemistry enhances resin-filler interaction
Controlled light scattering maintains opacity
Recommended Formulation Guidelines
Architectural Coatings: 8-15% by weight
Industrial Coatings: 5-12%
Wood Coatings: 10-18%
Marine Coatings: 7-14%
Sustainability Benefits
25% lower carbon footprint versus alternative extenders
Enables reduced TiO₂ usage without performance compromise
REACH compliant
VOC-free formulation compatibility
Quality Assurance
ISO 9001:2015 certified manufacturing
Batch-to-batch consistency guaranteed
Full material traceability
Comprehensive technical documentation available
Packaging & Handling
25kg multi-layer paper bags with moisture barrier
Bulk silo loading options
18-month shelf life in dry conditions
Non-hazardous material classification
Technical Support Services
Formulation optimization assistance
Performance testing protocols
Comparative evaluation with incumbent materials
Troubleshooting support
K-80 calcined kaolin continues to set industry benchmarks for performance extenders in coating applications, offering formulators an optimal balance between technical performance and cost efficiency. Its unique combination of properties makes it particularly valuable in today's market where both quality and sustainability are paramount considerations.
| Item | Unit | Spacification |
| Brightness | R457,% | 93 min |
| Particle size | -10 μm | 81 ± 3(-2 μm) |
| Oil absorption | g/100g | 62.5 ± 2.5 |
| Screen residue | 325mesh % | 0.005 g/cm³ |
| PH value | / | 6.0-7.5 |
| Moisture | kg/L | 0.8 g/cm³ |
| Volume density | g/cm³ | 0.4-0.6 |
| True density | g/cm³ | 2.65-2.75 |
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| Established | December 18, 2014 | ||
| Address | Building No.3, Area 6, No.188, West of South Forth Ring Rd, Beijing, China | ||
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About Beijing TDD E-commerce Co., Ltd.
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