Choose the Best Aluminum Hydroxide For Your Products
The various performance indicators of aluminum hydroxide (ATH) as a flame retardant have different degrees of importance to its application effect. The following is a ranking of the importance of various indicators (from most important to least important) based on the actual needs of aluminum hydroxide in flame retardant applications:
- Decomposition Temperature
Most important, the flame retardant effect of aluminum hydroxide is mainly achieved by decomposing and releasing water at a temperature of about 180°C, thereby absorbing a large amount of heat and diluting the combustible gas. Therefore, the thermal decomposition temperature is a key indicator to measure its effectiveness as a flame retardant. Directly affects the flame retardant properties of the material.
- Particle Size
Very important, the particle size affects the dispersibility of aluminum hydroxide in the polymer matrix, the filling effect, and the physical properties of the final product. Smaller particle sizes help improve the surface finish and flame retardant effect of the material; while larger particle sizes may provide better filling and mechanical properties.
- Chemical content (Al₂O₃ content)
Very important, the aluminum oxide content of aluminum hydroxide determines its purity and the proportion of active ingredients, which directly affects the flame retardant effect. The content of chemical impurities and moisture can affect the processing and performance of the product.
- Specific Surface Area
It is more important. The specific surface area affects the contact area between aluminum hydroxide and the polymer matrix. A higher specific surface area can usually increase the interaction between the flame retardant and the matrix and improve the flame retardant performance.
- Whiteness
Whiteness is more important for applications that require high appearance quality (such as white plastics and rubber products). High whiteness can reduce the impact on the color of the material, but has little effect on the flame retardant performance itself.
In the application of aluminum hydroxide as a flame retardant, thermal decomposition temperature and particle size are the two most important indicators, which directly determine the flame retardant effect and processing performance of the material. The chemical composition content is also very important, affecting the purity and stability during processing. For the rest, the influence of whiteness and bulk density is relatively small, mainly involving appearance and processing efficiency. Selecting and controlling these indicators can maximize the flame retardant effect and application performance of aluminum hydroxide.
