Molecular formula : (NH4PO3)n n>1000 Model No.: HC-APP
Molecular formula : (NH4PO3)n n>1000Model No.: HC-APP
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 | ¡æ | >275 |
Density(25¡æ) | g/cm3 | ~1.9 |
Solubility | g/100ml H2O, 25¡æ | ~0.5 |
pH value | ( 10% aqueous suspension ) | 6-8 |
Viscosity | (10%suspension, 25oC)mPa.s | <60 |
Monisture | %(w/w) | <0.25 |
Average particle size | µm | ~12 |
Particle size(<50 µm) | %(w/w) | >98 |
Usage: In plastics(PP, PVC, PE, etc. ), Polyester, Rubber, and Expandable fireproof coatings.Packing : 25kg woven bag with plastic liner.
supply flame retardant APP-II
