Aluminum Hydroxide Flame Retardant: Advantages of Aluminum Hydroxide as a Flame Retardant

Lower particle size of aluminum hydroxide results in greater specific surface area, improving flame retardancy. This further enhances interfacial interactions and boosts the mechanical properties of polymers.

Measures to Enhance the Flame Retardancy of Aluminum Hydroxide

1. Ultra-Fine Particle Size

Lower particle size of aluminum hydroxide results in greater specific surface area, improving flame retardancy. This further enhances interfacial interactions and boosts the mechanical properties of polymers.

2. High Purity

Increasing the purity of aluminum hydroxide significantly enhances its flame retardant effect.

3. Surfactant Treatment

Surface modification using anionic or cationic surfactants (e.g., higher fatty acids, acetic acid, alcohols, bromides) enhances affinity between aluminum hydroxide and polymer matrices. This improves product performance, boosts flame retardancy, enhances processability, increases compatibility with polymeric materials, and further elevates impact resistance in rubber and plastic products.

4. Coupling Agent Surface Treatment

Surface modification of aluminum hydroxide involves forming chemical bonds between the functional groups of coupling agent molecules and the aluminum hydroxide surface. The other end of the coupling agent molecule possesses organic-affinity properties, enabling chemical reactions or mechanical degradation with organic polymers. This tightly bonds aluminum hydroxide and polymers—materials with fundamentally different properties. In essence, molecular bridges form on the aluminum hydroxide surface, connecting these two specialized materials. This enhances compatibility with organic polymers, significantly improving the tensile strength, elongation, and impact resistance of unfilled polymers.

5. Synergistic Effects with Other Flame Retardants

Given the limited synergistic effects of individual flame retardants, multiple flame retardants are often combined to leverage synergistic interactions, compensate for shortcomings, reduce flame retardant usage, and enhance material flame retardancy, processability, and mechanical properties.

Advantages of Aluminum Hydroxide as a Flame Retardant

1) Significant cooling effect through endothermic reaction process
Aluminum hydroxide flame retardant

Aluminum hydroxide contains 34.46% crystalline water. When ambient temperature rises above 300°C, this water is fully released. Due to water's high specific heat capacity, its vaporization absorbs substantial heat from the surroundings. Magnesium hydroxide also contains crystalline water, but its moisture content is only 30.6%. Moreover, magnesium hydroxide adversely affects electrical properties, making it less suitable than aluminum hydroxide.

2) Environmentally friendly, safe, and non-toxic gas generation during flame retardation.

3) Reinforcing effect on products like rubber.

Aluminum hydroxide particle size extends to near-nanoscale (diameter

4) Abundant resources

Aluminum hydroxide preparation and processing technology is relatively mature, making it readily available and cost-effective. Aluminum hydroxide flame retardant