Industrial Coatings / Car Refinish / ATH

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.

 

Sibelco © 2022