Shanghai Semitech New Material Co., Ltd.
Address
1628 Lijing Road, Lingang New Area, 200000, Shanghai, China.
Maximizing Matting Efficiency: A Formulator's Guide
Precision optimization of gloss reduction in industrial coating systems.
1. Physical Properties
- Pore Volume (ml/g): High porosity delivers more scattering sites per gram.
- Particle Size (d50): Must be matched to DFT to avoid submergence or grit.
- Surface Modification: Untreated silica offers 10% higher efficiency than waxed grades.
2. Logic Comparison
| Parameter | Higher Efficiency | Higher Stability |
|---|---|---|
| Treatment | Untreated | Wax-Treated |
| Shrinkage | Solvent-Based (High) | UV/Powder (Zero) |
| DFT Match | d50 ≈ DFT | d50 << DFT |
Case Study: GMATT 100
The 100 Series utilizes maximum pore volume to ensure aggressive matting in high-performance industrial stacks where inter-coat adhesion is critical.
Technical FAQ & Troubleshooting
Why does matting efficiency drop in 100% solid UV coatings?
Unlike solvent systems, UV resins don't shrink during curing. This keeps silica particles submerged. Use our low oil-absorption UV Series to enable the higher dosages needed for dead-matte finishes.
How can I avoid the "blue haze" in dark wood finishes?
Hazing is caused by light scattering at the wrong refractive index. Use high-transparency silica with tight particle distribution to ensure clarity in dark walnut wood coatings.
Does high oil absorption lead to viscosity spikes?
Yes. In high-solid formulations, silica with high oil absorption "soaks up" too much resin, making the coating unworkable. Balancing Pore Volume and Oil Absorption is the key to rheology control.
Will untreated silica cause hard settling during storage?
Without wax treatment, silica aggregates can form hard cakes. We recommend using a fumed silica anti-settling agent to build a 3D network that keeps matting particles in suspension.
How does particle size affect scratch and burnish resistance?
Smaller particles generally provide better burnish resistance, while larger particles (matching DFT) offer better raw matting power. Wax-treated silica is essential for surface slip and scratch protection.