Key Features
- Zero Agglomeration (No Seeding): Proprietary hydrophilic-compatible treatment completely eliminates the risk of hard particles or “seeding” in water phase.
- Ultra-High Efficiency: Extremely high pore volume (≥2.0 ml/g) delivers target dead-matte finishes at significantly lower dosages.
- Rapid Wetting: Designed to wet out quickly in aqueous resins, drastically reducing micro-foam generation during dispersion.
- PUD & Acrylic Compatible: Optimal refractive index matching ensures zero hazing in highly demanding waterborne wood clear coats.
Applications
- High-end Waterborne Wood Coatings (Clear & Pigmented)
- Waterborne Industrial & Metal Finishes
- Waterborne Leather Finishes & Topcoats
- Eco-friendly / Zero-VOC Architectural Coatings
GMATT WB Series: Grade Selector
Waterborne clear coats are highly sensitive to particle size mismatch. Select between the ultra-fine W450 and the universal W550 based on your target Dry Film Thickness (DFT) to ensure maximum clarity and a perfectly smooth film.
| Grade | Spec | Recommended DFT | Notes |
|---|---|---|---|
| GMATT W450 | d50 4.5 – 5.0 µm | < 15 µm (Thin Film) | The ultimate choice for ultra-thin waterborne wood clear coats and leather finishes. Provides unparalleled transparency and a highly refined, silky touch. |
| GMATT W550 | d50 5.5 – 6.0 µm | 15 – 25 µm (Medium Film) | The universal standard for waterborne furniture and general industrial coatings. Delivers the perfect balance between extreme matting efficiency and clarity. |
💡 Formulator Tip: When formulating waterborne clear coats (especially over dark wood substrates), hazing is a primary concern. GMATT W450 is strictly recommended to maintain the natural depth of the wood grain without micro-roughness.
General Properties
Typical properties for the GMATT WB Series. Featuring ultra-high pore volume (≥2.0 ml/g) engineered specifically to maximize efficiency in water-based resin systems.
| Parameter | Typical Value | Unit |
|---|---|---|
| Pore Volume | ≥ 2.0 | ml/g |
| Oil Absorption | 210 – 260 | g/100g |
| Loss on Drying (2h @ 105°C) | ≤ 5.0 | % |
| Loss on Ignition (2h @ 1000°C) | ≤ 10.0 | % |
| pH Value (5% aqueous) | 6.0 – 8.0 | – |
| SiO₂ Content (dry basis) | ≥ 99.0 | % |
| Surface Treatment | Special Treatment (WB Optimized) | – |
- Typical values only. Not for sales specifications. Refer to COA for batch data.
OEM Bulk Supply
Need FCL quantities (25 MT+) with private-label packaging? HMMAT WB Series delivers the same waterborne-compatible zero-VOC silica in full-container volumes, audit-ready with ISO 9001 + REACH documentation.
Alternative Grades
Frequently Asked Questions
Formulation advice and technical solutions from our R&D engineers.
+How to disperse silica matting agents properly in waterborne coatings?
Unlike solvent-based systems, waterborne resins are highly prone to micro-foam generation under high shear. Our GMATT WB Series is specially treated for rapid wetting. We recommend adding it during the let-down stage under moderate shear (1000-1500 RPM) for 15-20 minutes. Grinding via bead mills is completely unnecessary and will destroy the matting efficiency.
+Why do some matting agents cause “seeding” or agglomeration in water-based paints?
Seeding (hard particles in the film) usually occurs when a standard matting agent’s surface treatment is incompatible with the water phase or the formulation’s surfactants. The GMATT WB Series utilizes a proprietary hydrophilic-compatible special treatment that guarantees flawless dispersion and zero agglomeration, ensuring a perfectly smooth dry film.
+How much matting agent to add for water-based polyurethane (PUD) or acrylics?
Because the GMATT WB Series features an ultra-high pore volume (≥2.0 ml/g), you generally need less material compared to standard grades to achieve the same gloss reduction. Start with a dosage of 2% to 5% based on total formulation weight. Always conduct a step-ladder test to pinpoint your specific target gloss.
+Does the WB series affect the viscosity or pH stability of waterborne resins?
No. The GMATT WB Series maintains a neutral pH range (6.0 – 8.0) and is chemically engineered to have minimal impact on the rheology of sensitive waterborne acrylics, PUDs, and emulsions. It maintains stable viscosity and gloss levels even during extended shelf storage.