Aluminum hydroxide performance advantage characteristics
Jan 30,2024
1. Particle size distribution centralization
Ultrafine aluminum hydroxide flame retardants with different particle sizes have different performance parameters, which directly affect the processing and use of downstream polymer materials. The smaller the standard deviation of the normal distribution of the particle size of ultrafine aluminum hydroxide products, the more consistent the performance, the more uniform and stable the processing and use of downstream polymer materials. Therefore, in the process of producing ultrafine aluminum hydroxide, the most important consideration is the concentration of particle size distribution.
2. Particle size nanosizing
Further reducing the particle size of ultrafine aluminum hydroxide has a significant effect. For example, under the same amount of use, the finer the particle size of ultrafine aluminum hydroxide flame retardant can improve the flame retardant effect; ultrafine inorganic rigid particles can play a toughening and strengthening effect in polymer materials to improve the mechanical properties of the material; ultrafine aluminum hydroxide can increase the contact area with the polymer matrix to enhance the interaction between the two to improve compatibility and the mechanical properties of the product.
3. Material surface modification
Through surface modification, the electrical properties, magnetic properties, surface tension and spatial resistance of the particle surface can be changed to improve its dispersion in the medium, thereby enhancing its compatibility with the downstream polymer materials, reducing or eliminating the embrittlement or performance degradation of the downstream polymer materials due to the addition of ultrafine aluminum hydroxide, thus greatly expanding the downstream application range of the ultrafine aluminum hydroxide flame retardant.
4.Synergization of flame retardant compounding
Different types of flame retardants have different advantages and characteristics, in order to better adapt to the needs of downstream materials and products, the synergistic compounding of a variety of flame retardants has become one of the important research topics. At present, the compounding synergistic technology with phosphorus and nitrogen system, magnesium hydroxide and other flame retardants is an important research and development direction of ultrafine aluminum hydroxide flame retardant.
5. High purification of product components
The purity of ultrafine aluminum hydroxide flame retardant directly affects its performance, and the presence of impurities (especially iron oxide and sodium oxide) will reduce the insulation and thermal stability of downstream polymer materials. Therefore, continuously improve the purity of ultrafine aluminum hydroxide flame retardant is also one of the important development direction of the industry.
6. Improvement of thermal stability
The decomposition temperature of common aluminum hydroxide is low, usually between 180°C-220°C, it starts to remove the water of crystallization, and when the temperature is too high in the process, the aluminum hydroxide will dehydrate and form bubbles, which will affect the mechanical properties of downstream products. Therefore, improving the thermal stability of ultrafine aluminum hydroxide has become one of the important development directions of the industry in the future.