Magnesium Hydroxide (MDH) is a high-performance, halogen-free flame retardant filler. Its key advantage over ATH is its significantly higher thermal stability, making it the ideal choice for polymers requiring high processing temperatures.

Flame Retardant Mechanism MDH functions via the same mechanism as ATH, but at a higher temperature:

1. High-Temp Endothermic Decomposition: MDH decomposes at approximately 330°C. This allows it to be safely compounded into high-temperature plastics without premature decomposition.

2. Cooling & Dilution: It endothermically releases ~31% of its weight as water vapor, providing a powerful heat sink (cooling) and gas dilution effect, identical to ATH.

3. Insulating Char: The resulting (magnesia) residue forms a stable, insulating ash layer that protects the polymer.

Key Application Areas

• Polyolefins: The primary FR for halogen-free flame retardant (HFFR) polypropylene (PP) compounds.

• Engineering Plastics: Used in Polyamides (PA) and other engineering plastics that are processed above 220°C.

• TPEs & TPVs: Widely used in thermoplastic vulcanizates and elastomers for automotive and construction.

• High-Temperature Wire & Cable: For cable compounds that must withstand higher processing and operating temperatures than ATH allows.