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As a leading Ammonium Polyphosphate (APP-0MF*) supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.
Why is microcapsule coating emphasized when preparing Ammonium Polyphosphate (APP-0MF*)?
To make this material, ordinary APP particles are first prepared, and then melamine formaldehyde resin is used as the wall material. After in-situ polymerization, microcapsules with a diameter of 50μm are formed to obtain Ammonium Polyphosphate (APP-0MF*). Coating is like coating pills with sugar coating. The wall material thickness is 1μm, which can isolate moisture and resin, so that the core material APP does not react with other components. The process requires strict control of the reaction pH value of 8.0 and the temperature of 70℃ to ensure that the wall material is evenly coated without core exposure. After testing, the coating rate reached 98%, which solved the disadvantages of ordinary APP's easy moisture absorption and poor compatibility with resin, and increased the dispersibility by 30%, making it the preferred choice for high-demand flame retardant systems.
How does Ammonium Polyphosphate (APP-0MF*) perform in polyurethane elastomers?
This product is added to polyurethane elastomer at a dosage of 18%. After mixing in an internal mixer, it is vulcanized and molded. The Shore hardness of the product is 85A and the elongation at break is 400%, which is 20% higher than that of uncoated APP. When burning, the wall material first decomposes and foams, and cooperates with the core material APP to form an expanded carbon layer with a thickness of 18 times the original thickness, which is 5 times thicker than that of the uncoated one. It has good compatibility with isocyanate and does not interfere with the cross-linking reaction. The product has no bubbles and the permanent deformation of compression is only 8%, which meets the requirements of seals. At a low temperature of - 30℃, the elasticity retention rate is 80%, so it is suitable for elastomeric products such as refrigerated truck sealing strips and mine conveyor belts, taking into account both flame retardancy and elasticity requirements.
How is the migration resistance of Ammonium Polyphosphate (APP-0MF*) guaranteed?
The PVC film containing this product was placed in a 60℃ oven for 30 days, and the migration amount was measured by weighing, which was only 0.3%, much lower than the 3% of ordinary APP. Its microcapsule wall material has good compatibility with resin, can anchor APP particles and prevent them from migrating to the surface, so the product has no frost after long-term use, and the surface gloss remains at 90%. In cable materials, after heat aging at 100℃, the insulation resistance retention rate is 95%, which is 20% higher than that of uncoated APP, indicating less migration and no effect on electrical performance. This feature makes it suitable for products such as wires and cables, sealing strips, etc. that need to maintain stable performance for a long time, solving the performance degradation problem caused by the migration of traditional APP.
What are the advantages of Ammonium Polyphosphate (APP-0MF*) processing adaptability?
The melting point of this product is 30℃ higher than that of the core material APP, reaching 200℃, so it can be processed at a higher temperature and is suitable for rubber products vulcanized at 180℃ without premature decomposition. Its melt has good fluidity, the screw conveying in the injection molding machine is smooth, there is no bridging phenomenon, and the production efficiency is 15% higher than that of ordinary APP. When mixed with pigments, it does not affect the coloring effect, and the color difference of the red plastic parts made is ΔE<2, which meets the appearance requirements. It is used in foaming materials, does not interfere with the decomposition of foaming agents, has a uniform cell structure, and a density deviation of <3%. Therefore, it performs well in the processing of complex-shaped products and reduces the scrap rate.
How to balance the cost and performance of Ammonium Polyphosphate (APP-0MF*)?
The coating process makes the cost 25% higher than that of ordinary APP, but because of the improved migration resistance, the service life of the product is extended by 1 time, and the overall cost is reduced. In high-end seals, automotive hoses and other products, its performance advantages are significant, and it can replace more expensive brominated flame retardants and reduce costs by 10%. Although the amount added needs to be increased by 5% compared to uncoated APP, it is more economical to use it for a long time because of its long-lasting performance. The residual formaldehyde content in its production process is less than 0.01%, which meets environmental protection standards. Therefore, in the field of durability and environmental protection, it has outstanding cost performance and is a sustainable development choice.