Boron-nitrogen flame retardant and magnesium hydroxide synergistic flame retardant epoxy resin: efficient and environmentally friendly flame retardant system

With the emphasis on environmental protection and safety, the development of halogen-free and efficient flame retardant systems has become a hot topic of research. Boron-nitrogen flame retardant and magnesium hydroxide (Mg(OH)₂) synergistically flame retardant epoxy resin not only improves the flame retardant effect, but also maintains the physical properties of the material.

Mechanism of action of boron-nitrogen flame retardant

Gas phase flame retardant: release nitrogen, reduce oxygen concentration, and slow down combustion.

Condensed phase flame retardant: boron compounds form non-flammable glassy substances at high temperatures, isolating oxygen and heat.

Synergistic effect: work together with other flame retardants such as magnesium hydroxide to improve flame retardant efficiency.

Flame retardant properties of magnesium hydroxide

Endothermic decomposition: decomposition produces water vapor, reducing the surface temperature of the material.

Isolation effect: the generated magnesium oxide (MgO) forms a protective layer to isolate oxygen and heat.

Suppression of smoke and toxic gases: reduce the generation of smoke and toxic gases during combustion.

Synergistic flame retardant mechanism

Combination of gas phase and condensation: Boron-nitrogen flame retardant dilutes oxygen in the gas phase, and magnesium hydroxide forms a protective layer in the condensed phase.

Improve flame retardant efficiency: Reduce the amount of flame retardant, reduce material weight gain, and improve efficiency.

Improve physical properties: Boron-nitrogen flame retardant improves the physical property degradation caused by magnesium hydroxide.

Experimental design

Flame retardant ratio: Study the effect of different ratios on the synergistic effect.

Addition amount: Determine the minimum addition amount to achieve the flame retardant grade.

Mechanical property test: Evaluate the effect of the formula on the mechanical properties of epoxy resin.

Thermal stability test: Use TGA and other methods to evaluate the thermal stability of the material.

Flame retardant performance test: Evaluate the flame retardant performance through UL 94, LOI and other methods.

Research case

The study shows that the synergistic use of boron-nitrogen flame retardant and magnesium hydroxide significantly improves the flame retardant and mechanical properties of epoxy resin.

Conclusion

The synergistic flame retardant system of boron-nitrogen flame retardant and magnesium hydroxide provides an efficient and environmentally friendly flame retardant solution for epoxy resin. By optimizing the ratio and addition amount, the flame retardant efficiency can be further improved, the cost can be reduced and the environmental impact can be reduced.