Ammonium polyphosphate
(phase-II) (BL-APP201)
Molecular formula : (NH4PO3)n n>1000
CAS No.: 68333-79-9
EINECS No.: 269-789-9
Model No.: BL-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, it decomposes to polymeric phosphate acid and ammonia. The polyphosphoric acid reacts with hydroxyl groups to form a nonstable phosphateester. Following dehydration of the phosphateester, a carbon foam is built up on the surface and acts as an insulation layer.
Specification :
|
Specification |
|
Value |
|
Appearance |
|
White powder |
|
P Content |
%(w/w) |
≥31 |
|
N Content |
%(w/w) |
≥14 |
|
Decomposition Temperature |
>270 | |
|
Density(25) |
g/cm3 |
~1.9 |
|
Solubility |
g/100ml H2O, 25 |
~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 m) |
%(w/w) |
≥97 |
In plastics(PP, PVC, PE, etc. ), Polyester, Rubber, and Expandable fireproof coatings.
Packing : 25kg woven bag with plastic liner.