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/cm
• 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]	SSA [m2 /g]	L*
Portaflame	SG 20	5.4	18.2	24	5.3	97.5
	SG 63	23	58	19	0.7	96.5
	SG 100LV	26	120	10	1	96.5
	SG 200	90*	-*	10	-*	94

 

Production locations Portaflame SG, Portafill A

 

Application

ATH will provide:

• Flame retardancy: at a temperature of 180°C, ATH decomposes, releasing water. The water vapour can kill the flame, cool the air and dilute the gases released during the fire.