ATH
ATH (aluminium tri hydrate, chemical formula Al(OH)3)
is a sidestream from the production of aluminium. ATH can be characterized by:
- High purity;
- High whiteness;
- Relatively low density of 2.4 g/ cm3 compared to other mineral fillers, which are typically at 2.7 g/ cm3;
- Medium Mohs hardness of 3;
- Decomposition around 180 °C, releasing water.
Basic properties
Property | Value | Unit |
Moisture | < 0.4 | [%] |
pH | 9 | [-] |
Hardness (Mohs) | 3 | [-] |
Refractive index | 1.57 | [-] |
Electrical conductivity | 60 | [µS/cm] |
L.O.I. | 34.5 | [%] |
Density | 2.4 | [kg/ dm3] |
Product overview:
Product | Grade | D50
[µm] |
D97
[µm] |
OA
[g/ 100 g] |
L* |
Portafill | A7 | 2.4 | 6.5 | 27 | 98.5 |
A10 | 3.8 | 10 | 27 | 98.4 | |
A25 | 7.3 | 24 | 21 | 97.0 | |
A40 | 11.5 | 36 | 20 | 96.5 | |
A25/10 | 13 | 35 | 18 | 98 |
Production locations Portaflame SG, Portafill A
Application
ATH will provide:
- Sandability: due to its fairly low hardness of 3 on Mohs scale, a coating with ATH is still relatively easy to sand, giving the perfect basis for a high gloss finish
- Chemical resistance: due to its inert nature, ATH will provide good chemical resistance compared to conventional fillers.