Halogen-free flame retardant TPU special halogen-free intumescent fire retardant TPU is a company based TPU molecular structure and physical properties of macromolecules grafted via a specially designed halogen-free expansion of P-N-based environmentally friendly flame retardants. The flame retardant features: compatibility with TPU and dispersion, high flame retardant efficiency, no migration, no precipitation, does not absorb moisture, water resistance, and stable electrical properties, the product does not affect the coloring, minimal impact on the physical properties of TPU. The product has high thermal stability, ease of processing, for the new environmentally friendly halogen-free flame retardants. Technical Specifications: Appearance: white powder flowability P content%:> 20% decomposition temperature: ≥280 ℃ particle um: moisture content of about 15%: <0.2% PH value: about 7 Usage and dosage: 1. Dosage: ① add about 18-20% in the polyester-based TPU. ② adding the polyether TPU about 20-22%, to obtain a higher oxygen index, to V-0 level requirements. 2. Use the method: ① extrusion, injection molding can minimize the heating time. ② Recommendation: The maximum heating temperature should not exceed 250 ℃.