Amine Hydrogen Equivalent Weight [ AHEW ]unit: grams / equivalent.
{ sometimes referred to as equivalent weight per active Hydrogen }
Definition: Grams of hardener containing one equivalent of N-H groups.
or: Mw of the hardener divided by the number of active hydrogen per molecule
Parts per Hundred Resin [ phr ]unit: grams
Definition: grams of hardener needed per hundred grams of epoxy resin
Conversion:phr = { AHEW * 100 } / EEW
Amine Value { Aminzahl }unit: mg KOH / gram hardener
sometimes called amine-index
Definition: mg KOH equivalent to one gram of hardener
Conversion:NO CORRELATION WITH AHEW
Amine content [ Aminwert ]unit: eq / kg
Definition: equivalents of N-H per kg hardener
Conversion:Amine content = 1000 / AHEW
Molecular Weight is 146
Functionality is 6
Amine Hydrogen Equivalent Weight [ AHEW ] = 146 / 6 = 24 g / eq
Amine content= 1000 / 24 = 42 eq / kg
In order to cure100 grams of resin with EEW = 200 g / eq one would need:
phr = 24 * 100 / 200 = 12 grams
