The TDS recommends:
Reviewer’s assessment: This is sound advice. Over-dispersion collapses porous structure, permanently reducing matting efficiency. For industrial production, ED 30 should be added as a pre-dispersion in a compatible solvent/resin at 30–40% solids, then let-down. Syloid Ed 30 Tds Pdf
Missing from TDS: Advice on temperature stability during dispersion (should stay <40°C to prevent moisture pickup). The TDS recommends:
The TDS will state the typical Hegman value (usually around 5-6, or 25-30 microns). This tells the formulator that Syloid ED 30 requires medium-to-high shear dispersion but does not need heavy milling (which would crush the particles and destroy matting efficiency). Reviewer’s assessment: This is sound advice
| Property | Typical Value (based on published data) | Implication | |----------|------------------------------------------|--------------| | Mean Particle Size (d50) | ~4.5 – 5.5 µm | Fine particle size → smooth surface feel, good clarity | | Oil Absorption | ~250 – 300 g/100g | High porosity → high matting efficiency | | pH (5% slurry) | ~6 – 7 | Neutral → compatible with most resin systems | | Specific Gravity | ~2.0 g/cm³ | Low density → needs proper dispersion | | Porosity (pore volume) | ~1.5 – 1.8 mL/g | High porosity → efficient gloss reduction | | Loss on Drying | ≤ 5% | Low moisture → stable in non-aqueous systems |
Note: Exact values should be verified from the actual Syloid ED 30 TDS PDF.