Endothermic Decomposition: MDH decomposes at ~330°C, absorbing heat and releasing water vapor, which cools the material and dilutes flammable gases.
Higher Decomposition Temperature: Compared to aluminum hydroxide (ATH), MDH withstands higher processing temperatures, making it suitable for engineering plastics.
Smoke & Toxic Gas Suppression: Reduces smoke and toxic gas emissions during combustion, improving fire safety.
Advantages:
Environmentally Friendly: Halogen-free, non-toxic, and safe for humans and the environment.
High Thermal Stability: Can withstand higher processing temperatures (up to 300°C), making it compatible with many polymers.
Dual Functionality: Acts as both a flame retardant and smoke suppressant.
Good Synergy: Works well with other flame retardants (e.g., phosphorus-based additives) for improved performance.
Applications:
Plastics & Polymers: Polyolefins, PVC, polypropylene, polyethylene, and rubber compounds.
Wire & Cable Insulation: Used in low-smoke, halogen-free (LSHF) cables and conduits.
Construction Materials: Insulation boards, roofing materials, and fire-resistant panels.
Textiles & Coatings: Enhances flame resistance in industrial fabrics and protective coatings.
Electronics & Appliances: Adds flame resistance to casings and electrical components.
Processing Considerations:
Particle Size & Surface Treatment: Smaller particle sizes improve dispersion, and surface-treated MDH can enhance compatibility with polymers.
Loading Levels: Typical loading ranges from 20–60%, depending on the desired flame retardancy and mechanical properties.
Water Release Effect: As MDH releases water vapor when decomposing, high loadings may affect material properties (like mechanical strength or flexibility).
