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As a leading Melamine Cyanurate (MCA) supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.
How to control the reaction ratio when preparing Melamine Cyanurate (MCA)?
This product is made by using melamine and cyanuric acid as raw materials, and adding them into a stainless steel reactor at a molar ratio of 1:1, adding deionized water as the medium, and the solid-liquid ratio is 1:5. The temperature is raised to 90℃, the stirring rate is 40 rpm, and the reaction is carried out for 3 hours. The pH value of the slurry needs to be measured during the process and maintained at 5.5-6.0. If the taste is controlled by a spoon, if it is acidic, there is excessive cyanuric acid, and if it is alkaline, there is residual melamine. After the reaction is completed, it is cooled to 30℃, crystals are precipitated, centrifuged and dehydrated, and dried at 80℃ to obtain a white powder, namely Melamine Cyanurate (MCA). Its purity reaches 99.5%, the nitrogen content is 67%±0.2%, and the moisture content is <0.1%. This process is like the balance of yin and yang, and only when the proportion is appropriate can a product with regular crystals be obtained, which is an important material for nylon flame retardancy.
What is the effect of Melamine Cyanurate (MCA) in nylon products?
This product is added to nylon 6 at a dosage of 15%, mixed by a twin-screw extruder (temperature 230-250℃), and the flame retardant of injection molded strips reaches UL94 V-0 level (0.8mm), and the oxygen index increases from 21% to 32%. The tensile strength is retained by 90%, reaching 65MPa, and the impact strength is 5.8kJ/m², which is only 8% lower than that without addition. In nylon 66, the addition amount is 18%, and the heat deformation temperature is retained at 210℃, which is suitable for engine compartment parts. It has good compatibility with glass fiber and enhances the bending strength of nylon to 180MPa. Therefore, it is widely used in nylon products such as automotive connectors and electronic connectors. There is no dripping when burning, the carbon layer is tough, and the fire retardant effect is long-lasting.
What is the difference between Melamine Cyanurate (MCA) and other nitrogen flame retardants?
Compared with melamine, Melamine Cyanurate (MCA) has better thermal stability, with a weight loss rate of only 2% at 350℃, while melamine is 10%, so it is resistant to high processing temperatures. It has better dispersibility in nylon, with no agglomeration at a particle size of 20μm, while melamine is easy to agglomerate. It has high flame retardant efficiency, and the oxygen index is 3-5 percentage points higher at the same addition amount, because the cyanuric acid group in the molecule is more likely to promote carbonization. Although the cost is 15% higher than melamine, the dosage can be reduced by 20%, and the overall cost is lower, making it the preferred choice for high-performance nylon flame retardant.
How is the water resistance of Melamine Cyanurate (MCA) manifested?
When nylon specimens containing 15% MCA were immersed in 80℃ hot water for 90 days, the weight loss rate was only 1.2%, which is much lower than the 5% of melamine. Its solubility in water is 0.05g/100mL. There is no white frost on the surface after soaking, and the flame retardant level remains V-0. It is used for bathroom nylon parts. After long-term water vapor erosion, the mechanical properties are retained by 85%, so it is suitable for products in humid environments to solve the problem of poor water resistance of traditional nitrogen flame retardants.
What are the specifications for the processing and storage of Melamine Cyanurate (MCA)?
This product is packaged in kraft paper bags, 25kg per bag, lined with PE film, and stored in a dry warehouse with a relative humidity of <60% and a stacking height of no more than 8 bags. No drying is required before processing. When mixing with nylon, the screw speed is 200 rpm to avoid excessive shearing and particle size reduction. It has low dust flying, and KN90 masks can be worn during operation. The equipment needs to be grounded to prevent static electricity. In case of agglomeration, it can be reused after screening with a 100-mesh sieve, and the performance remains unchanged.