Ammonium Polyphosphate (APP)
Ammonium Polyphosphate (APP)
CAS# 68333-79-9
Specification
- White Powder
- 31.0-32.0
- 14.0-15.0
- 0.25 Maximum
- 5.5-7.5
- 0.5 Maximum
- 260 Minimum
- ~15
- 50 Maximum
Application
Ammonium Polyphosphate (APP) is a non-halogen flame retardant which acts by an intumescence mechanism. When APP 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 phosphate ester. Following dehydration of the phosphate ester, a carbon foam is built up on the surface and acts as an insulation layer.
APP is used in plastics such as PP, PVC, PE, polyester, rubber, and expandable fireproof coatings.
Packaging
Ammonium Polyphosphate (APP) is available 25 kg bags, palletized.