PP Halogen-Free Flame Retardant

The PP halogen-free flame retardant produced by Taixing adopts the core technology of high-purity ammonium polyphosphate (APP) purification, melamine cyanurate (MCA) synergy, and nano silica modification. It can achieve UL 94 V-0 level flame retardant for 1.6mm PP products at a dosage of 25% -30%, while maximizing the lightweight and impact resistance advantages of the substrate, completely free of halogens, heavy metals, and harmful precipitates. It provides a "high-performance, high environmental protection, low-cost" halogen-free flame retardant solution for fields such as new energy vehicles, electronics and electrical equipment, and building materials.

Core strengths

1. Phosphorus nitrogen synergistic flame retardant, achieving efficient flame retardant with low addition amount

-Adopting a high-purity APP (purity ≥ 99.8%)+MCA+nano silica ternary synergistic formula, the total halogen (Cl+Br) content is ≤ 500ppm, far below the international halogen-free standard limit, and no corrosive hydrogen halide gas is released during combustion.

-Dual effect synergy of flame retardant mechanism: capturing combustion free radicals in the gas phase and interrupting chain reactions; The condensed phase promotes the formation of a dense expanded carbon layer on the PP substrate, with a carbon layer expansion rate of 15:1, effectively blocking oxygen and heat transfer. Adding 28% to 1.6mm thick PP products can stably achieve UL 94 V-0 level, with a limit oxygen index (LOI) of ≥ 33%, and the amount added is reduced by 15% -20% compared to traditional inorganic halogen-free flame retardants.

-No droplets, low smoke toxicity characteristics, combustion smoke toxicity meets the highest safety level of EU EN 13501-1:2024, smoke density (DS, 4 minutes) ≤ 170, greatly improving the safety of personnel evacuation in fire scenarios.

2. Nano modification optimization, ultimate compatibility with PP substrate

-By using silane coupling agent KH-560+PP-g-MAH grafting double-layer coating technology, an affinity layer highly matched with PP molecular chains was constructed on the surface of flame retardant particles, which improved the interface compatibility by 65% and completely solved the industry pain points of uneven dispersion, agglomeration whitening, and surface pitting of traditional halogen-free flame retardants.

-The average particle size is precisely controlled within 2.0-2.5 μ m, with a particle size distribution span of ≤ 0.8 μ m. It is tightly bonded with the PP matrix, and the surface smoothness of the processed product can reach mirror level, suitable for scenarios with strict appearance requirements such as household appliance shells and automotive interior parts.

-Without the need for additional dispersants or compatibilizers, it can be processed by directly melting and blending with PP resin, without changing the parameters of existing extrusion and injection molding production lines. The processing torque is reduced by 25%, and the production efficiency is increased by 18%.

3. Low performance loss, ensuring the core mechanical advantages of PP substrate

-The mechanical properties of PP substrate are minimally affected, with a tensile strength retention rate of ≥ 93%, a notch impact strength of ≥ 5.5 kJ/m ², and a fracture elongation retention rate of ≥ 88%, perfectly solving the problem of material brittleness caused by high addition of traditional halogen-free flame retardants.

-The 1% thermal weight loss temperature is ≥ 320 ℃, and the processing temperature window is wide up to 180-230 ℃. It accurately matches the processing temperature of various substrates such as homopolymer PP, copolymer PP, and high impact PP, and there is no decomposition, yellowing, or gas release during high-temperature processing, avoiding defects such as bubbles and warping in the product.

-The water absorption rate is ≤ 0.5% (24-hour immersion test), far below the industry average level, effectively improving the weather resistance and long-term stability of the product. There is no discoloration or brittleness after 6 months of outdoor use.

Application scenarios

In the field of new energy vehicles

-Application: Automotive interior panels, door panel frames, battery casings, high-voltage wire harness sheaths

-Recommended formula: High impact PP 72%+PP halogen-free flame retardant 25%+synergist 3%

-Advantages: Low smoke toxicity characteristics comply with FMVSS 302 automotive interior flame retardant requirements, pass VOC and ELV testing standards, lightweight design helps reduce body weight, and adapts to the high safety needs of new energy vehicles

Electronic and electrical field

-Application: 5G base station casing, router casing, power adapter casing, home appliance control panel

-Recommended formula: 70% copolymer PP+28% halogen-free flame retardant PP+2% synergist

-Advantages: Halogen free environmental characteristics meet global access standards for electronic devices, with a smooth and defect free surface, temperature resistance suitable for long-term operation of electronic devices, and stable flame retardant performance up to UL 94 V-0 level

Building materials field

-Application: PP-R water supply pipe, flame-retardant ventilation duct, cable tray, building formwork

-Recommended formula: 68% homopolymer PP+30% halogen-free flame retardant PP+2% synergist

-Advantages: The flame retardant rating meets the B1 level requirements of the EU CPR building regulations, is resistant to acid and alkali corrosion, has a low water absorption rate to ensure long-term stability, and does not release corrosive gases.