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YS-201 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.
1. Low water solubility and low organic solvent solubility.
2. Halogen free, excellent fire resistance.
3.Suitable for cable fireproofing coatings, epoxy resin-based and unsaturated resin-based FRP composites, EVA, PE, PP, PU etc.
