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, 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
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~1.9
|
|
Solubility
|
g/100ml H2O, 25℃
|
~0.5
|
|
pH value
|
( 10% aqueous suspension )
|
5.5-7.5
|
|
Viscosity
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(10%suspension, 25oC)
|
<100
|
|
Monisture
|
%(w/w)
|
<0.25
|
|
Average particle size
|
µm
|
~15
|
|
Particle size(<50 µm)
|
%(w/w)
|
>97
|
Use :
In plastics(PP, PVC, PE, etc. ), Polyester, Rubber, and Expandable fireproof coatings.
Packing : 25kg woven bag with plastic liner.