APP Flame Retardant

Traditional flame retardants face pain points such as environmental non-compliance, poor water resistance, and weak compatibility. The APP flame retardant produced by Taixing innovatively adopts the core technology of high-temperature melt polymerization and polymer coating modification to create high-performance products with customizable polymerization degree (n=500-2000), with a phosphorus content of ≥ 31% and a nitrogen content of ≥ 14.5%. It constructs a triple synergistic flame retardant system of "catalytic carbonization expansion barrier gas phase suppression", and can achieve material UL 94 V-0 flame retardant with only 10% -25% addition, completely solving the industry problems of "moisture absorption migration, carbonization looseness, and performance degradation" of traditional APPs, providing a cost-effective halogen-free flame retardant solution for the global manufacturing industry.

Core strengths

1. High degree of polymerization customization, excellent water resistance and stability performance

-Innovative gradient temperature controlled melt polymerization method: Breaking through the bottleneck of traditional polymerization technology, it can accurately control the polymerization degree (n=500-2000) according to customer needs. Type I high polymerization degree products (n ≥ 1000) have a crystallinity of up to 98%, a solubility in water of ≤ 0.5g/100mL at 20 ℃, and a water resistance improvement of 300% compared to ordinary apps. It is fully suitable for long-term humid service scenarios such as outdoor building materials and cable sheaths.

-Outstanding weather resistance and migration resistance: After being placed in a humid and hot environment of 85 ℃/85% RH for 1500 hours, there is no moisture absorption or agglomeration, and no migration or precipitation. This solves the problem of flame retardant performance degradation caused by hydrolysis in traditional APPs and ensures the long-term stability of the product's performance.

-Wide temperature range thermal stability compatible with multiple processes: 1% thermal weight loss temperature ≥ 320 ℃, entering the high-efficiency decomposition stage at 400 ℃, processing temperature window covering 200-350 ℃, can be matched with various processing processes such as plastic injection molding, coating curing, rubber vulcanization, etc. High temperature processing does not release toxic gases and does not affect the quality of product molding.

2. Polymer coating modification, with dual advantages of compatibility and carbonization

-Innovative polyurethane silane composite coating technology: A dense polymer protective layer is constructed on the surface of APP particles, greatly improving compatibility with organic substrates and increasing dispersion uniformity by 90%. This completely solves the problems of white spots and decreased mechanical properties caused by uneven dispersion and agglomeration of traditional APP products.

-Catalytic formation of dense expanded carbon layer: At high temperatures, the coating layer and APP work together to catalyze rapid dehydration and carbonization of the substrate, forming a honeycomb shaped dense carbon layer with a thickness 10-20 times that of the original material. The thermal conductivity is ≤ 0.15W/(m · K), effectively blocking oxygen and heat transfer, and the flame retardant efficiency is 60% higher than that of ordinary APP.

-Controllable loss of mechanical properties: After addition, the tensile strength retention rate of PP material is ≥ 92%, and the impact strength retention rate of epoxy resin is ≥ 88%, without the need for additional dispersants, perfectly balancing flame retardant performance and product structural strength requirements.

3. Phosphorus nitrogen synergistic flame retardant, efficient, low additive, environmentally friendly and safe

-Triple synergistic flame retardant mechanism: Under high temperature conditions, APP decomposes and releases polyphosphate (acid source), catalyzing the formation of a carbon layer on the substrate; The released ammonia and water vapor (gas source) dilute the concentration of combustible gases in the combustion area; The expanded carbon layer (carbon source) physically blocks oxygen and heat transfer, while quenching combustion free radicals, achieving a comprehensive flame retardant protection of "gas phase+condensed phase".

-Low dosage reduces formula cost: adding 15% to PP material can achieve 1.6mm UL 94 V-0 grade; Adding 12% to the expansion type fireproof coating can maintain the steel structure in an 800 ℃ flame for 1.5 hours without collapsing, reducing the amount added by 25% -30% compared to ordinary APP and significantly reducing production costs.

-Zero halogen, low smoke, and low toxicity properties: completely free of harmful substances such as halogens, heavy metals, and polybrominated diphenyl ethers. The smoke density (DS, 4 minutes) during combustion is ≤ 120, and the smoke toxicity reaches the highest safety level of EU EN 13501-1:2024. There is no release of toxic gases such as dioxins and hydrogen halides, which is in line with the global trend of environmental protection and flame retardancy.

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

-Recommended formula: PP substrate 80%+APP flame retardant 15%+pentaerythritol (carbon source) 3%+melamine (gas source) 2%

-Advantages: With a thickness of 1.6mm and UL 94 V-0 rating, the dielectric performance is stable (volume resistivity ≥ 10 ¹⁴Ω· cm), and the processing flowability is good. It has passed RoHS 2.0 and REACH full compliance certification, meeting the needs of large-scale production of electronic appliances.

Fireproof coatings and building materials field

-Application: Steel structure fireproof coating, wood flame retardant coating, flame retardant gypsum board, plywood

-Recommended formula: acrylic lotion 60%+APP flame retardant 12%+expanded graphite 8%+carbon forming auxiliary 10%+auxiliary 10%

-Advantages: The expanded carbon layer is dense and tough, with a fire resistance limit of over 1.5 hours, excellent resistance to moisture and heat aging, and meets the GB 8624-2012 B1 flame retardant standard. The coating has no odor or yellowing.

Rubber and cable field

-Application: PE/EVA cable sheath, styrene butadiene rubber conveyor belt, automotive rubber seal

-Recommended formula: EVA base material 75%+APP flame retardant 20%+compatibilizer 3%+anti-aging agent 2%

-Advantages: Passed the IEC 60332-3 bundle flame retardant test, with a limit oxygen index (LOI) of ≥ 32% and an elastic recovery rate of ≥ 90%. The weather resistance meets the long-term outdoor use requirements and is suitable for large-scale production of cables and rubber products.

Textile and other fields

-Application: Flame retardant cotton fabric, polyester fabric, dry powder fire extinguishing agent, agricultural slow-release fertilizer enhancer

-Recommended formula: Textile flame retardant finishing solution: APP 15%+urea 5%+adhesive 8%+water 72% (diluted 500 times by immersion rolling)

-Advantages: Textile flame retardant time is less than 5 seconds, meeting the GB 50222-2017 flame retardant standard; Fire extinguishing agents have high fire extinguishing efficiency and no secondary pollution; Phosphorus slow-release can be achieved in fertilizers, improving fertilizer utilization efficiency.