Halogen-Free Flame Retardant APP

Halogen based flame retardants are gradually being phased out in the market due to the release of toxic hydrogen halide gases and the production of carcinogenic dioxins during combustion. The halogen-free flame retardant APP produced by Taixing innovatively adopts the core technology of high crystalline directional polymerization+silane melamine composite coating, and constructs a triple synergistic flame retardant system of "catalytic dense carbonization - expanded oxygen thermal barrier - gas-phase free radical quenching". With only 10% -25% addition, the material can achieve UL 94 V-0 level flame retardant, completely solving the industry pain points of "low efficiency, poor compatibility, and weak water resistance" of traditional halogen-free flame retardants, and providing an environmentally friendly flame retardant solution with ultimate performance and compliance guarantee for the global manufacturing industry.

Core strengths

1. Zero halogen environmental attributes, in line with the global trend of green development

-Completely free of restricted substances such as halogens, heavy metals, PFAS, etc., there is no release of toxic and harmful gases such as hydrogen halides and dioxins during the combustion process. The smoke density (DS, 4 minutes) is ≤ 110, and the smoke toxicity reaches the highest safety level of EU EN 13501-1:2024, eliminating the risk of secondary pollution from the source.

-Compliant with mainstream global environmental standards for halogen-free products, it can help downstream products easily pass certifications such as the EU WEEE Directive and China RoHS 2.0, breaking down green barriers in international trade and meeting the hard demand for halogen-free products in the high-end market.

-The waste substrate after flame retardant treatment can be recycled and regenerated, and the combustion residue is non-toxic phosphate, which can be naturally degraded or used as a soil amendment, in line with the concept of "carbon neutrality" and circular economy development.

2. High degree of polymerization crystal stability, excellent water resistance and migration resistance

-Adopting the high crystallization type II directional polymerization method, the polymerization degree n is precisely controlled to be ≥ 1000, and the crystallinity is as high as 98.5%. The solubility in water at 20 ℃ is ≤ 0.5g/100mL, which improves the water resistance by 300% compared to ordinary type I APP, solving the pain points of flame retardant migration and precipitation and performance degradation in humid environments.

-The original silane melamine double-layer composite coating technology forms a dense protective film on the surface of the particles, isolating direct contact between moisture and the substrate. After being placed in a humid and hot environment at 85 ℃/85% RH for 1800 hours, there is no moisture absorption or agglomeration. After 72 hours of immersion in warm water, the flame retardant performance deteriorates by ≤ 3%, making it perfectly suitable for long-term service scenarios such as outdoor building materials and cable sheaths.

-The thermal decomposition temperature is ≥ 320 ℃, and the processing temperature window covers 200-350 ℃. It can be matched with multiple high-temperature processes such as plastic injection molding, coating curing, and rubber vulcanization. There is no decomposition or gas release during high-temperature processing, and it does not affect the quality of product molding.

3. Phosphorus nitrogen synergistic high-efficiency flame retardant, outstanding carbon barrier ability

-Triple synergistic flame retardant mechanism: When exposed to fire, it releases polyphosphoric acid (acid source), which efficiently catalyzes the dehydration and carbonization of the substrate; Release ammonia and water vapor (gas source) to dilute the concentration of combustible gases in the combustion area; Form a honeycomb shaped dense carbon layer (carbon source) with a thickness 15-25 times that of the original material, physically blocking oxygen and heat transfer, while quenching combustion free radicals, achieving comprehensive protection of "condensed phase+gas phase".

-Low dosage to reduce costs and increase efficiency: Adding 15% to PP plastic can achieve 1.6mm UL 94 V-0 grade; Adding 12% to the expansion type fireproof coating can achieve a fire resistance limit of over 1.5 hours for steel structures, reducing the amount of traditional halogen flame retardants by 20% -25% and significantly reducing the formulation cost.

-Effectively suppressing the phenomenon of melting droplets, solving the safety hazard of melting droplets igniting surrounding objects during the combustion of polyolefin materials such as PP and PE, and significantly improving the fire safety level of products.

4. Excellent interface compatibility, balancing flame retardancy and product performance

-By surface activation and coating modification, the polarity difference between inorganic powder and organic substrate is significantly reduced, and the compatibility with PP, PE, epoxy resin, polyurethane and other substrates is improved by 95%. The dispersion uniformity reaches micrometer level, avoiding defects such as white spots and decreased mechanical properties caused by agglomeration in the product.

-The impact on the mechanical properties of the product is minimal: the retention rate of the tensile strength of PP material after addition is ≥ 92%, the retention rate of the impact strength of epoxy resin is ≥ 90%, and the adhesion of the coating meets the Grade 1 standard of GB/T 9286-1998, without changing the original color, feel, and usability of the product.

-The powder has excellent dispersibility and no equipment blockage caused by adhesion. It can be directly used in various processing techniques such as injection molding, extrusion, spraying, and impregnation, adapting to the needs of large-scale production and improving production efficiency.

Application scenarios

Plastic and Electronic Electrical Field

-Applications: PP/PE electrical enclosures, PA nylon connectors, epoxy resin PCB substrates, insulation components for new energy battery packs, automotive interior parts

-Recommended formula: PP substrate 82%+halogen-free flame retardant APP 15%+pentaerythritol (carbon source) 2%+melamine (gas source) 1%

-Advantages: The product has a thickness of 1.6mm and meets UL 94 V-0 standards, with stable dielectric properties (volume resistivity ≥ 10 ¹⁴Ω· cm). It has passed RoHS 2.0 and REACH full compliance certifications, meeting the halogen-free requirements of high-end electronic appliances.

Fireproof coatings and building materials field

-Application: Steel structure fireproof coating, building curtain wall fireproof coating, tunnel fireproof coating, flame retardant plywood, gypsum board

-Recommended formula: acrylic lotion 62%+halogen-free flame retardant APP 12%+expanded graphite 7%+carbon forming auxiliary 9%+water 30%

-Advantages: The coating has a fire expansion rate of ≥ 20 times, a fire resistance limit of over 1.5 hours, and can withstand water immersion for 72 hours without bulging or peeling. It meets the GB 14907-2018 steel structure fireproof coating standard and halogen-free environmental protection requirements.

Rubber and new energy field

-Applications: EVA cable sheath, styrene butadiene rubber conveyor belt, polyurethane foam, new energy battery pack flame retardant liner, photovoltaic module backplane

-Recommended formula: EVA base material 76%+halogen-free flame retardant APP 19%+compatibilizer 3%+anti-aging agent 2%

-Advantages: Passed the IEC 60332-3 bundle flame retardant test, with a limit oxygen index (LOI) of ≥ 33%, elastic recovery rate of ≥ 92%, weather resistance for long-term outdoor use, and suitable for halogen-free flame retardant standards in the new energy industry.

Textile and other fields

-Application: Flame retardant cotton fabric, polyester fabric, non-woven fabric, forest fire barrier agent, agricultural film flame retardant additive

-Recommended formula: Textile flame retardant finishing solution: halogen-free flame retardant APP 12%+urea 4%+environmentally friendly adhesive 7%+water 77% (diluted 500 times by immersion rolling)

-Advantages: The textile has a flame retardant time of less than 3 seconds, meets the GB 50222-2017 flame retardant standard, has a soft touch without "frost" phenomenon, does not contain harmful substances such as formaldehyde, and meets the environmental protection requirements of home textiles and children's products.

If you are looking for halogen-free flame retardant apps, phosphorus nitrogen synergistic halogen-free flame retardants, environmentally friendly ammonium polyphosphate, and halogen based alternative flame retardants, Taixing will be your best partner!