Ammonium PolyPhosphate APP
Molecular formula : (NH4PO3)n n>1000
CAS No.: 68333-79-9
EINECS No.: 269-789-9
Model No.: CF-APP201
Ammonium polyphosphate(Phase II) is a non-halogen flame retardant. It acts as flame retardant by intumescence mechanism. When APP-II is exposed to fire or heat, ammonium phosphate decomposes to polymeric phosphate acid and ammonia. The polyphosphoric acid reacts with hydroxyl groups to form a nonstable phosphate ester. Following dehydration of the phosphate ester, a carbon foam is built up on the surface and acts as an insulation layer.
Ammonium Polyphosphate Specification :
Specification |
|
Value |
Appearance |
|
White powder |
P Content |
%(w/w) |
≥31 |
N Content |
%(w/w) |
>14 |
Decomposition Temperature |
¡æ |
>270 |
Density(25¡æ) |
g/cm3 |
~1.9 |
Solubility |
g/100ml H2O, 25¡æ |
~0.5 |
PH value |
( 10% aqueous suspension ) |
5.5-7.5 |
Viscosity |
(10%suspension, 25oC) |
<100 |
Monisture |
%(w/w) |
<0.25 |
Average particle size |
µm |
~15 |
Particle size(<50 µm) |
%(w/w) |
>97 |
Ammonium Polyphosphate Use :
In plastics(PP, PVC, PE, etc. ), Polyester, Rubber, and Expandable fireproof coatings.
Packing : 25kg woven bag with plastic liner.