Halogen-Free Flame Retardant Solution for High-Performance Polyester Composites

Magnesium Hydroxide (MDH) is an environmentally friendly inorganic flame retardant widely used in unsaturated polyester resin (UPR) and composite materials.

When incorporated into unsaturated polyester resin systems, Magnesium Hydroxide can help improve the flame-retardant and smoke-suppressing performance of the final composite while providing a halogen-free solution.

Why Use Magnesium Hydroxide in UPR?

🔥 Effective Flame Retardancy
Magnesium Hydroxide decomposes at elevated temperatures and releases water, absorbing heat and helping reduce the temperature of the polymer matrix during combustion.

💨 Smoke Suppression
MDH can help reduce smoke generation during combustion, contributing to improved fire safety in composite applications.

🌱 Halogen-Free & Environmentally Friendly
As an inorganic, halogen-free flame retardant, Magnesium Hydroxide is suitable for applications requiring more environmentally friendly flame-retardant systems.

⚙️ Good Filler Performance
With appropriate particle size and surface treatment, MDH can provide good dispersion and compatibility within unsaturated polyester resin systems.

Typical Applications

Magnesium Hydroxide can be used in UPR-based materials such as:

• Flame-retardant composite panels
• FRP (Fiber Reinforced Plastic) products
• Electrical and electronic components
• Cable and electrical insulation materials
• Construction and building materials
• Transportation composite components
• Industrial molded products
• Other flame-retardant polyester composites

Wanfeng Magnesium Hydroxide Solutions

Wanfeng provides different types of Magnesium Hydroxide, including:

Mineral-Method MDH
Chemical-Method MDH
Hexagonal Platelet Magnesium Hydroxide
Surface-Modified Magnesium Hydroxide

Different grades can be selected according to requirements for purity, particle size, surface treatment, dispersion and flame-retardant performance.

We can also develop customized Magnesium Hydroxide grades according to the customer's resin formulation and processing requirements.

If you are looking for a halogen-free flame retardant for unsaturated polyester resin, we welcome you to contact us for product specifications, samples and technical discussion.

Wanfeng New Material Technology — Your Partner for Inorganic Flame-Retardant Solutions.

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