Industrial Coatings / Wood Coatings / ATH

ATH

ATH (aluminium tri hydrate, chemical formula Al(OH)3) is a side stream of aluminium production, characterised by:

 

  • High purity
  • 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°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:

  • Chemical resistance: due to its inert nature, ATH provides good chemical resistance compared to conventional fillers.
  • Gloss control: with the availability of ultrafine ground ATH (Portafill A7) and a product with an optimised particle size distribution (Portafill A25/10), it is possible to apply coatings with a broad range of gloss levels.
  • Stain blocking and stain resistance: ATH acts as a supporting mineral filler in stain blocking and stain resistant coatings.
  • UV-curing compatibility: being transparent for UV radiation, ATH does not block the curing mechanism.

 

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