supply flame retardant APP-II

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