ATH
Mineral: Synthetic ATH
ATH (aluminium tri hydrate, chemical formula Al(OH)3) is an intermediate product of aluminium production, characterised by:
- High purity (99.5%)
- High whiteness
- Relatively low density of 2.4g/cm3 compared to other mineral fillers, which are typically at 2.7g/cm3
- Medium Mohs hardness of 3
- Decomposition around 180-200°C, releasing water
Mineral: Natural ATH (Gibbsite)
Gibbsite is a naturally occuring ATH, characterised by:
- High purity (90-95%)
- Relatively low density of 2.4g/cm3 compared to other mineral fillers, which are typically at 2.7g/cm3
- Medium Mohs hardness of 3
- Decomposition around 180-220°C, releasing water
Basic properties
| Property | Sythetic ATH | Natural ATH | Unit |
| Moisture | < 0.4 | <0.7 | [%] |
| pH | 9 | 5 | [-] |
| Hardness (Mohs) | 3 | 3 | [-] |
| Refractive index | 1.57 | 1.57 | [-] |
| Electrical conductivity | 60 | – | [µS/cm] |
| L.O.I. | 34.5 | 31 | [%] |
| Density | 2.4 | 2.4 | [kg/ dm3] |
Application Specific Products:
| Product | Grade | D50
[µm] |
| Portaflame | SG50 | 16 |
| SG63 | 23 | |
| G63 | 6 | |
| SG55 LV | 15 | |
| SG100 LV | 33 |
Production locations: Maastricht (NL), Geertruidenberg (NL), Poviglio (IT), Balaruc (FR), Brassington (UK)
Functionality: flame retardancy. Low viscosity grades with an optimized packing will allow high loading levels maximizing the LOI at a good MFI and processing torque.
Safety
