1. Centralized particle size distribution

The superfine aluminum hydroxide flame retardants with different particle sizes have different performance parameters, which directly affect the processing and use performance of downstream polymer materials. The smaller the standard deviation of normal distribution of particle size of ultra-fine aluminum hydroxide products, the more consistent the performance, and the more uniform and stable the processing and use performance of downstream polymer materials. Therefore, in the process of producing ultra-fine aluminum hydroxide, the most important consideration factor is the concentration of particle size distribution.

2. Nanometer size

Further reducing the particle size of ultra-fine aluminum hydroxide has a remarkable effect. For example, under the same amount of use, the finer the particle size of superfine aluminum hydroxide flame retardant, the better the flame retardant effect; Ultrafine inorganic rigid particles can play a role in toughening and strengthening polymer materials, and improve the mechanical properties of materials; Ultrafine aluminum hydroxide can increase the contact area with the polymer matrix, enhance the interaction between them, and improve their compatibility and mechanical properties of products.

3. Material surface modification

Through surface modification, the electrical, magnetic, surface tension and steric hindrance of particle surface can be changed, its dispersion in the medium can be improved, its compatibility with downstream polymer materials can be improved, and the embrittlement or performance degradation of downstream high molecular materials caused by the addition of ultra-fine aluminum hydroxide can be reduced or eliminated, thus greatly expanding the downstream application scope of ultra-fine aluminum hydroxide flame retardant.

4. Synergistic flame retardancy

Different types of flame retardants have different advantages and characteristics. In order to better meet the needs of downstream materials and products, the coordination of multiple flame retardants has become one of the important research topics. At present, the synergistic technology with phosphorus nitrogen system, magnesium hydroxide and other flame retardants is an important research and development direction of superfine aluminum hydroxide flame retardants.

5. Highly purified product components

The purity of superfine aluminum hydroxide flame retardant directly affects its performance. The presence of impurities (especially ferric oxide and sodium oxide) will reduce the insulation and thermal stability of downstream polymer materials. Therefore, increasing the purity of superfine aluminum hydroxide flame retardant is also one of the important development directions of the industry.

6. Improve thermal stability

The decomposition temperature of ordinary aluminum hydroxide is low, and the crystallization water is usually removed from 180 ° C to 220 ° C. When the temperature is too high during processing, aluminum hydroxide will dehydrate and form bubbles, affecting the mechanical properties of downstream products. Therefore, improving the thermal stability of ultra-fine aluminum hydroxide has become one of the important development directions of the industry in the future.