[Appearance]
white powder
[Specification]
| P2O5 |
%(W/W) |
72-73 |
| N |
%(W/W) |
14-15 |
| Decomposition temperature |
°C |
>270 |
| Density (25°C) |
g/cm3 |
~1.9 |
| Solubility |
g/100ml H2O, 25°C |
<0.8 |
| PH (10% aq. solution) |
|
5-7 |
| Water |
%(W/W) |
<0.25 |
| Particle size (>50μm) |
%(W/W) |
<1 |
[Description]
APP is a non-halogen flame retardant. It acts as flame retardant
by intumescence mechanism. When APP are exposed to fire or
heat, it decomposes to polymeric phosphoric acid and ammonia.
The polyphosphoric acid reacts with hydroxyl groups to form
a non stable phosphate ester. Following dehydrated of the
phosphate ester, a carbon foam is built up on the surface
and acts as an insulation layer.
Characteristics: high polymerization degree, good heat-stability,
low hygroscopicity. Low fume, low toxicity, melting drop free.
[Application]
in plastics (PP, PVC, PE, etc.), polyester, rubber, and expandable
fireproof coatings.
[Packaging]
Plastic woven bag with liner. Net weight 25Kg. |
Ammonium
Polyphosphate , Crystalline phase II 
