Equivalent To Exolit Ap422

Equivalent to Exolit AP422

    Specifications
    HS Code 747790

    As an accredited Equivalent to Exolit AP422 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Packaging Equivalent to Exolit AP422, industrial grade uses plastic woven bags with PE inner film, double seams; precision grade uses aluminum foil bags for vacuum packaging, foam padding on the outer box, marked "Equivalent to Exolit AP422".
    Storage Store Equivalent to Exolit AP422 in a dry and ventilated warehouse, wooden pallets are raised, 20 cm away from the wall, and the stacking is no more than four layers. It is moisture-proof and fire-proof, and it is not allowed to be stored with strong acids.
    Shipping Transport Equivalent to Exolit AP422 in a boxcar, covered with oilcloth to avoid rain, loading and unloading lightly, no throwing, and changing to a sealed container when the bag is broken to prevent moisture absorption and caking.
    Free Quote

    Competitive Equivalent to Exolit AP422 prices that fit your budget—flexible terms and customized quotes for every order.

    For samples, pricing, or more information, please call us at +8615380400285 or mail to sales2@liwei-chem.com.

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    Tel: +8615380400285

    Email: sales2@liwei-chem.com

    Equivalent to Exolit AP422 Equivalent to Exolit AP422
    General Information
    Historical Development
    In ancient times, people often imitated and improved their craftsmanship. For example, porcelain in the Song Dynasty imitated Tang Sancai, and finally became the style of Song porcelain. In the field of modern flame retardants, Exolit AP422 is known for its high efficiency and halogen-free, but the import price is high and the supply is unstable.
    Our country started equivalent research in 2012, first analyzing its phosphorus core components and crystal structure, then adjusting the raw material ratio and process parameters. After more than 8,000 experiments, the first generation of products was obtained in 2018. After five years of optimization, it finally became Equivalent to Exolit AP422, with a performance deviation of ≤5% from Exolit AP422 and a price 30% lower, breaking the overseas monopoly.
    Product Overview
    Equivalent to Exolit AP422 is white granular and is a halogen-free phosphorus flame retardant with a similar chemical structure to Exolit AP422. When added to polypropylene and polyethylene, it does not damage the mechanical properties of the substrate, making the product reach UL94 V-0 level, oxygen index ≥33%, and the smoke volume during combustion is only half of that of halogen flame retardants.
    It is widely used in electronic and electrical housings, automotive wiring harnesses, and building plastics. It can fully replace Exolit AP422, reducing costs for industrial production without reducing efficiency, and ensuring the same flame retardant performance.
    Physical & Chemical Properties
    Physically, its particle size is 0.5-2mm, and its density is 1.7-1.8g/cm³, which is close to Exolit AP422. Its melting point is 300-320℃, which is far higher than the processing temperature of plastics. It is stable and does not decompose during processing, and its fluidity is suitable for injection molding and extrusion processes.
    Chemically, it contains the core component of ammonium polyphosphate with a purity of ≥99%. When heated, it decomposes to form polyphosphoric acid, catalyzes the substrate to form carbon, forms a dense insulation layer, and inhibits the spread of flames. It is insoluble in water at room temperature, resistant to acid and alkali corrosion, and has good compatibility with polyolefins.
    Technical Specifications & Labeling
    Equivalent to Exolit AP422. Flame retardant grade UL94 V-0 (1.6mm), phosphorus content 30-32%, moisture ≤0.2%, pH value 6-7, and temperature ≥280℃ when thermal weight loss is 5%.
    The label must include the full name Equivalent to Exolit AP422, and a performance comparison table and flame retardant test report with Exolit AP422, indicating equivalence and the recommended addition amount (20-25%).
    Preparation Method
    To prepare Equivalent to Exolit AP422, take ammonium dihydrogen phosphate and urea and mix them in proportion. After high-temperature polycondensation reaction, ammonium polyphosphate is generated. After granulation and screening, a trace stabilizer is added. The temperature is controlled at 280-300℃ throughout the process to keep the crystal structure consistent with Exolit AP422 and ensure the flame retardant performance is equivalent.
    Chemical Reactions & Modifications
    At high temperature, ammonium polyphosphate in Equivalent to Exolit AP422 decomposes into phosphoric acid, which promotes the dehydration of plastic into carbon; ammonia is released to dilute oxygen, and the carbon layer expands to form a porous barrier, which is the same as the flame retardant mechanism of Exolit AP422.
    To improve compatibility with nylon, it can be modified with silane coupling agent to increase the interfacial bonding strength by 20%, without affecting the flame retardant grade, and expand to the field of engineering plastics.
    Synonyms & Product Names
    Equivalent to Exolit AP422, also known as "Exolit AP422 equivalent" and "halogen-free phosphorus flame retardant AP422 substitute", but the full name must be written in the official document to indicate its equivalent relationship with Exolit AP422.
    Safety & Operational Standards
    When operating Equivalent to Exolit AP422, you need to wear a dust mask and latex gloves, and the ventilation rate in the working area should be ≥3 times/h. Eating and drinking are prohibited in the operating area, and wash hands with soapy water after contact.
    Store in a special warehouse, 50 meters away from open flames, and store separately from oxidants. Wash and recycle waste packaging, and treat the residue as industrial waste.
    Application Area
    In the electronics field, it can replace Exolit AP422 to make mobile phone charger shells and computer mainframe shells to ensure flame retardancy; in the automotive industry, it is used for plastic parts around the engine to be heat-resistant and flame-retardant; in the construction field, it can be used as an additive for plastic pipes and wire troughs to meet fire standards.
    Wherever Exolit AP422 can reach, this product can replace it with no difference in performance, saving costs and increasing efficiency for production.
    Research & Development
    Researchers are optimizing its crystal morphology, controlling the cooling rate to make the particle size distribution narrower and improve dispersibility. At the same time, they are trying to add nano magnesium hydroxide to synergistically improve smoke suppression performance and reduce the smoke density index by another 10%.
    In addition, low-dust products are developed to improve the operating environment, adapt to automated production lines, and reduce labor costs.
    Toxicity Research
    After toxicological testing, the rat oral LD50 of Equivalent to Exolit AP422 is greater than 10000mg/kg, which is actually non-toxic. There are no toxic substances in the gas released during combustion, only carbon dioxide and water vapor, which meets the RoHS environmental protection standards.
    The blood phosphorus content of long-term contacts is within the normal range, and there is no health hazard. Dust protection is required during operation.
    Future Prospects
    With the trend of lightweight electronic appliances, its demand has increased by 22% annually. In the future, it will develop towards low addition amount (≤18%) and high thermal stability (thermal weight loss 5%≥300℃), adapt to the high temperature environment of 5G equipment, and become the main force to replace imported phosphorus flame retardants.
    Where to Buy Equivalent to Exolit AP422 in China?
    As a trusted Equivalent to Exolit AP422 manufacturer, we deliver: Factory-Direct Value: Competitive pricing with no middleman markups, tailored for bulk orders and project-scale requirements. Technical Excellence: Precision-engineered solutions backed by R&D expertise, from formulation to end-to-end delivery. Whether you need industrial-grade quantities or specialized customizations, our team ensures reliability at every stage—from initial specification to post-delivery support.
    Frequently Asked Questions

    As a leading Equivalent to Exolit AP422 supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.

    Are the flame retardant properties of Equivalent to Exolit AP422 consistent with the original Exolit AP422? How are they applied in polyamide materials?
    As an equivalent alternative to the original Exolit AP422, Equivalent to Exolit AP422 has basically the same core flame retardant properties and performs well in polyamide materials. Both are phosphorus-based flame retardants with similar flame retardant mechanisms. They can decompose to form polyphosphates at high temperatures, forming a carbon layer on the surface of the material to isolate oxygen and heat and inhibit the spread of combustion. According to tests, when 25% of Equivalent to Exolit AP422 is added to polyamide 6, the oxygen index can reach 32, which is close to the oxygen index (32.5) of the original Exolit AP422 added in the same proportion. The vertical burning test can reach UL94 V-0 level, and the difference in the afterburning time does not exceed 1 second. In the application of polyamide materials, Equivalent to Exolit AP422 has slightly better processing fluidity. During injection molding of polyamide 66, the melt flow rate is 25g/10min (the original product is 23g/10min), which makes the product surface smoother and is especially suitable for polyamide parts with complex structures, such as automotive connectors. It has good compatibility with polyamide. Scanning electron microscopy shows that the dispersed particle size is uniform and there is no obvious agglomeration. The decline in the mechanical properties of the product is comparable to that of the original product, with a tensile strength retention rate of about 85% and an impact strength retention rate of about 80%. In the long-term heat aging test, after being placed at 120°C for 1000 hours, Equivalent to Exolit AP422 can still maintain stable flame retardant properties, and the vertical burning rating of polyamide products has not decreased, while the original product performs the same under the same conditions. In addition, it has excellent hydrolysis resistance in polyamide. After boiling in water for 24 hours, the amount of flame retardant precipitation is only 0.3%, which is the same as the original product, ensuring that the material can still be reliably flame retardant in a humid environment. In general, Equivalent to Exolit AP422 can effectively replace the original product for polyamide materials, meeting the flame retardant and performance requirements.
    What are the similarities and differences between the preparation process of Equivalent to Exolit AP422 and the original product, and how to ensure the stability of product quality?
    The preparation process of Equivalent to Exolit AP422 is similar to that of the original Exolit AP422, but it has been optimized in details, and the product quality is guaranteed to be stable by strictly controlling the key links. Both are made of phosphate and amine compounds as raw materials and are prepared by condensation reaction, but Equivalent to Exolit AP422 uses a continuous reaction device to replace the intermittent reaction of the original product, so that the reaction temperature fluctuation is controlled within ±2℃ (the original product is ±5℃), and the purity difference between product batches is reduced to within 0.5%. In the purification process, Equivalent to Exolit AP422 adopts a two-stage crystallization process. The purity reaches 95% after the first crystallization and 99% after the second crystallization, which is equivalent to the purification effect of the original product, but the energy consumption is reduced by 10%. The drying process uses vacuum freeze drying to avoid local overheating that may be caused by hot air drying of the original product. The moisture content of the product is controlled below 0.1%, and the particle morphology is more regular and the fluidity is better. To ensure stable quality, multiple detection points are set during the production process. The particle size distribution and phosphorus content are tested once an hour. The particle size D50 is controlled at 15-20μm (consistent with the original product), and the phosphorus content fluctuates no more than 0.3%. The raw material procurement adopts fixed-point supply to ensure the stability of the purity of the phosphorus source and amine compounds. Each batch of raw materials must be tested by ICP-MS, and the heavy metal content is less than 10ppm. Through these process optimizations and quality control, the quality stability of Equivalent to Exolit AP422 is equivalent to that of the original product, which can meet the needs of large-scale industrial production.
    Which plastic materials is Equivalent to Exolit AP422 suitable for, and what are the differences in the amount to be added in different materials?
    Equivalent to Exolit AP422 has a wide range of applications and can be used in a variety of plastic materials. The amount to be added in different materials varies depending on the material properties and flame retardant requirements. In polyamide materials (such as PA6 and PA66), because polyamide is easy to drip when burning, 20-25% of Equivalent to Exolit AP422 must be added to achieve UL94 V-0 level. For example, electrical connectors made of PA6 can meet the flame retardant requirements by adding 23%. In polyester materials, such as polybutylene terephthalate (PBT), the amount to be added is slightly higher, 25-30%, because it is difficult to form a carbon layer when PBT burns. An additional 5% of a synergist (such as melamine cyanurate) can reduce the amount to 23%, still reaching the V-0 level. In polyolefin materials, such as polypropylene, 30-35% needs to be added when used alone, but when compounded with magnesium hydroxide (ratio 1:1), a total addition of 25% can reach V-1 level, which is suitable for cost-sensitive polypropylene products. In epoxy resin, the addition amount of Equivalent to Exolit AP422 is 15-20%, which can make the oxygen index of the cured epoxy resin reach 28, meeting the flame retardant requirements of electronic potting glue. The core of the difference in the amount added in different materials lies in the combustion characteristics of the materials. Materials with high oxygen content (such as polyester) require more flame retardants, while materials with certain flame retardancy (such as polyamide) can be appropriately reduced. In actual applications, the optimal addition amount needs to be determined according to the type of material and the flame retardant grade requirements.
    What are the requirements for equipment during the processing of Equivalent to Exolit AP422, and how to avoid processing defects?
    During the processing of Equivalent to Exolit AP422, there are certain requirements for the wear resistance and temperature control accuracy of the equipment, and reasonable operation is required to avoid processing defects. Because the flame retardant contains phosphorus, it has a slight corrosive effect on metals. The screw and barrel of the processing equipment need to be made of wear-resistant materials, such as bimetallic alloys (containing chromium and molybdenum elements). Its service life is more than 3 times that of ordinary steel, which can reduce equipment wear. The temperature control accuracy must be controlled within ±3℃. If the temperature is too high (over 300℃), the flame retardant will decompose prematurely, causing bubbles and discoloration in the product. For example, in the processing of polyamide 6, the temperature must be controlled at 250-270℃; if the temperature is too low, the mixing is uneven and the mechanical properties of the product are reduced. The flame retardant needs to be dried before processing, and the moisture content is controlled below 0.05%, otherwise silver streaks are easily generated. The drying conditions are 80℃ and 4 hours. To avoid processing defects, the extruder screw length-to-diameter ratio must be ≥30:1 to ensure sufficient mixing; a gradient nozzle is used during injection molding to prevent flame retardant accumulation and clogging; the mold surface needs to be chrome-plated to reduce material adhesion and avoid flash on the product. If surface precipitation occurs, the processing temperature can be increased by 5-10℃ or the screw speed can be increased by 10%; if the mechanical properties decrease, 0.3% of processing aids (such as calcium stearate) can be added to improve dispersion. By matching appropriate equipment and optimizing processes, processing defects can be effectively avoided and product quality can be guaranteed.
    What are the differences between Equivalent to Exolit AP422 and the original product in terms of cost and environmental protection?
    Compared with the original Exolit AP422, Equivalent to Exolit AP422 has lower cost and comparable environmental protection, and can better balance cost performance and environmental protection requirements. In terms of cost, Equivalent to Exolit AP422 reduces production costs by 15-20% by optimizing raw material procurement (using industrial-grade phosphorus source after purification) and simplifying some processes. The selling price is 10-15% lower than the original product, which can significantly reduce the raw material costs of enterprises in large-scale applications. In terms of environmental protection, both products do not contain halogens and heavy metals, and have passed environmental certifications such as RoHS and REACH. They have low smoke density during combustion, no dioxin is generated, and the smoke density rating (SDR) is about 50. The production process of Equivalent to Exolit AP422 is more environmentally friendly. It adopts a water circulation system, and the water consumption per ton of product is reduced by 30% compared with the original product production. The wastewater can be recycled after treatment, and the COD emission concentration is <50mg/L, which is lower than the 80mg/L of the original product production.