Key Features
- High Clarity: Optimized refractive index; no hazing on dark finishes.
- Anti-Settling: Advanced wax-treated surface prevents hard caking.
- High Efficiency: High pore volume ensures target gloss at low dosages.
- Easy Dispersion: Narrow particle distribution for quick dispersion under low shear.
Applications
- Premium Solvent-based Wood Coatings (Clear & Pigmented)
- Coil Coatings
- General Industrial Baking Enamels
- Leather Finishes
GMATT 200 Series: Grade Selector
To balance extreme clarity and matting efficiency, the GMATT 200 Series offers gradient particle sizes (4.0–9.5 µm). Select the ideal grade based on your target Dry Film Thickness (DFT).
| Grade | Spec | Recommended DFT | Notes |
|---|---|---|---|
| GMATT 240/245 | d50 4.0 – 5.0 µm | < 15 µm (Ultra-thin) | For leather and thin-film coatings. Provides a silky smooth touch. |
| GMATT 255/260 | d50 5.0 – 6.5 µm | 15 – 25 µm (Thin) | Premium wood clear coats & 3C coatings. High transparency, zero hazing. |
| GMATT 270 | d50 7.0 – 7.5 µm | 25 – 35 µm (Medium) | General industrial & coil coatings. Best overall matting efficiency. |
| GMATT 285/290 | d50 8.5 – 9.5 µm | > 35 µm (Thick) | Heavy-duty, floor & thick wood primers. Maximum matting & recoatability. Theoretical Support: WHY GMATT 200 SERIES OFFERS HIGHER EFFICIENCY → |
💡 Formulator Tip: For maximum clarity on dark substrates, choose GMATT 240/245 or 255/260. If your goal is a dead-matte finish at the lowest dosage in thicker films, GMATT 285/290 offers the highest efficiency.
General Properties
Typical properties for the GMATT 200 Series. Backed by gel-process technology for high pore volume and stability.
| Parameter | Typical Value | Unit |
|---|---|---|
| Pore Volume | ≥ 1.8 | ml/g |
| Oil Absorption | 210 – 260 | g/100g |
| Loss on Drying (2h @ 105°C) | ≤ 5.0 | % |
| Loss on Ignition (2h @ 1000°C) | ≤ 9.0 | % |
| pH Value (5% aqueous) | 6.0 – 8.0 | – |
| SiO₂ Content (dry basis) | ≥ 99.0 | % |
| Surface Treatment | Organic Wax | – |
- Typical values only. Not for sales specifications. Refer to COA for batch data.
Series Selection Summary
In conclusion, the GMATT 200 Series represents the industry standard for high-clarity wax-treated matting agents. By selecting the appropriate particle size based on your target Dry Film Thickness (DFT), formulators can achieve exceptional gloss reduction, superior anti-settling stability, and a smooth, premium surface finish in high-end wood and industrial coatings.
OEM Bulk Supply
Need FCL quantities (25 MT+) with private-label packaging? HMMAT 200 Series delivers the same wax-treated silica chemistry 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 much silica matting agent should I add to my coating formulation?
The typical addition level ranges from 3% to 8% based on the total formulation weight, depending on your target gloss level (e.g., dead matte vs. satin) and the resin system. We highly recommend conducting a step-ladder test to determine the exact dosage required for your specific Dry Film Thickness (DFT).
+Why use wax-treated silica matting agents instead of untreated grades?
Wax-treated silica (like our GMATT 200 & 300 Series) is engineered to prevent hard caking during long-term storage. The wax coating provides steric hindrance, ensuring that any settled particles form a soft, easily re-dispersible sediment. It also enhances the mar and scratch resistance of the final coating.
+How to disperse silica matting agents effectively without grinding?
Our synthetic amorphous silica features a highly controlled pore volume and narrow particle size distribution. It can be easily incorporated using a standard high-speed dissolver (e.g., cowles blade) at low shear forces (1500-2000 RPM for 15-20 minutes). Grinding via bead mills is not required and should be avoided to prevent destroying the matting efficiency.
+How to prevent hard settling of matting agents in low-viscosity coatings?
For low-viscosity systems like UV curable coatings or deep-penetrating wood primers, hard settling is a common issue. We recommend using our specially treated grades (such as the GMATT 300 Series) which offer superior suspension behavior. Additionally, pairing the matting agent with an appropriate rheology modifier (like our Fumed Silica) can create a stable thixotropic network.
+How does the particle size (d50) of matting agents affect coating transparency?
Matching the average particle size (d50) to your Dry Film Thickness (DFT) is critical. If the particle size is too large for a thin film, it causes surface roughness and white spots (hazing). If it is too small, it gets buried in the resin, reducing matting efficiency. Use our GMATT 240/245 and 255/260 (4.0–6.5 µm) for high-clarity thin films, and GMATT 285/290 (8.5–9.5 µm) for heavy-duty thick films.