HMMAT 103 is the standard untreated grade in the HMMAT silica matting agent range, with d50 4–4.5 µm and porosity ≥1.8 ml/g. Positioned between the fine-particle HMMAT 101 and the coarser HMMAT 106, it covers the broadest range of solvent-borne coating DFT targets (30–70 µm) with consistent matting efficiency and clean, wax-free chemistry. Untreated SiO₂ ≥99% ensures zero inter-coat adhesion penalty and full compatibility with UV-cure, baking-enamel, and two-component crosslink chemistries. It is the direct equivalent of Grace Syloid ED2/C803 and Evonik Acematt HP230, supplied by Henan Minmetals East in 10 kg bags on FCL terms.
Key Features
- Broad DFT Compatibility: d50 4–4.5 µm works across DFT 30–70 µm — the standard specification range for furniture, wood, and industrial solvent-borne topcoats.
- Untreated — Full Recoatability: No surface modifier means no wax migration and no barrier to inter-coat adhesion in multi-layer finishing systems.
- High Porosity: ≥1.8 ml/g anchors particles in the wet film and delivers stable, repeatable gloss reduction batch to batch.
- Clean Burnoff Chemistry: Loss on ignition ≤6%; suitable for food-contact packaging lacquers and baking enamels.
- Grace ED2/C803 · Evonik HP230 Drop-In: Specification confirmed against published Grace and Evonik data; no reformulation required when switching.
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Particle Size (d50) | 4–4.5 | µm |
| Porosity | ≥1.8 | ml/g |
| Oil Absorption | 220–270 | g/100g |
| Loss on Drying (2h @ 105°C) | ≤5 | % |
| Loss on Ignition | ≤6 | % |
| pH Value (5% aqueous) | 6–8 | — |
| SiO₂ Content | ≥99 | % |
| Surface Treatment | None (Untreated) | — |
| Packaging | 10 kg bags | — |
| Equivalent Grade | Grace Syloid ED2/C803 · Evonik Acematt HP230 | — |
Per HMMAT product profile. Refer to batch CoA for release data.
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Applications
- Furniture and Wood Coatings (DFT 30–60 µm): 4–8% in solvent-borne PU or NC topcoats for satin to matte finishes.
- Industrial Topcoats: 3–6% in alkyd or epoxy industrial topcoats; untreated chemistry avoids adhesion issues at primer/topcoat interfaces.
- Leather Finishes: 2–5% in polyurethane leather topcoats; wax-free surface ensures no migration on flexible substrates.
- Baking Enamels: 2–4% in thermosetting melamine-alkyd or polyester baking enamels; clean burnoff (LOI ≤6%) meets food-contact compliance.
When to Choose HMMAT 103 vs Alternatives
HMMAT 103 is the standard selection for solvent-borne DFT 30–70 µm systems requiring untreated chemistry. For thinner films (below 30 µm), use HMMAT 101 (d50 3.5–4 µm) for a smoother texture. For scratch resistance alongside matting, use HMMAT 205 (organic-treated, d50 4.5–5 µm). Against Grace Syloid ED2/C803 or Evonik Acematt HP230, HMMAT 103 offers 25–40% lower landed cost on FCL volumes.