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Alfrimal (aluminum tri-hydrate) was added to a poly urethane casting system increases the rigidity of the PU (PU at gietsysteeem D80, for example, of 70 Shore A to a maximum of 85). Alfrimal with the maximum casting thickness PU casting system D80 is 100 mm instead of 30 mm.
Aluminum tri-hydrate is self-extinguishing and gives this property partly with the PU in which the filler is mixed.
The addition of Alfrimal prolongs the processing time of 5 to 10 minutes and adding the ontmaltijd from 50 minutes to 180 minutes.The of a small amount of filler will make the PU stronger. Too much filler, however, makes the PU brittle (but louder).
The maximum ratio in a normal polyurethane casting system is Polyol: Isocyanate: Alfrimal is 1: 1: 3
In bags of 1.5 kg or 25 kg.
If stored on a dry location this filler has an indefinite shelf life.
Bulk Weight (g / L) :
Density (g / cm³) :
Particle Size (microns) :
0 - 192
PH value :