Hexagonal Platelet Magnesium Hydroxide
Description
Technical Parameters
Product introduction
The hexagonal flake magnesium hydroxide obtained by the chemical synthesis method by ZC-TECH has the characteristics of complete crystal structure, narrow particle size distribution, low impurity content of free water, chloride, and heavy metals. As a flame retardant or flame retardant filler, it is blended with high polymer plastics such as polyethylene, polypropylene, polystyrene, and ABS resin, with good dispersibility and rheological properties, good processability, and good flame retardant and smoke-reducing effects. It is used as f lame retardant material in polymer systems such as wires and cables, plastics, rubber and it is also used as a flame retardant coating for fabrics such as cotton, fibers, and silk.
Product parameter
| Item | MH-1 | MH-2 | MH-1 DL | MH-2 DL | MH-N2 | MH-N3 |
| Attached Water(%) | <0.5 | <0.5 | <0.5 | <0.5 | <0.5 | <0.5 |
| Mg(OH)2 (%) | ≥99.8 | ≥99.8 | ≥98.0 | ≥98.0 | / | / |
| Whiteness(%)≥ | ＞98.0 | ＞98.0 | ＞98.0 | ＞98.0 | ＞96.0 | ＞96.0 |
| D50(μm) | 1.0-1.3 | 1.8-2.2 | / | / | 1.7-2.3 | 2-2.5 |
| Oil Absorption(DOP) | 35-40 | 33-37 | 30-35 | 28-32 | 32-38 | 35-45 |
| Specific Surface Area(m2/g) | 6.5-9 | 3-5.5 | 6-9 | 3-5.5 | 2-4 | 8-9 |
| PH | 10-11 | 10-11 | 10-11 | 10-11 | 9-11 | 9-11 |
| Conductivity (μS/cm) | ＜200 | ＜200 | ＜100 | ＜100 | ＜100 | ＜100 |
| L.O.I(%) | > 30.8 | > 30.8 | > 30.6 | > 30.6 | / | / |
| 325 Screen Residue (%) | ＜0.1 | ＜0.1 | ＜0.1 | ＜0.1 | ＜0.1 | ＜0.1 |
| Bulk Density (g/L) | 220-300 | 400-450 | 220-300 | 450-500 | 380-480 | 250-350 |
| Microstructure | Hexagonal platelet | Hexagonal platelet | Hexagonal platelet | Hexagonal platelet | Hexagonal platelet | Hexagonal platelet |
Product Effects
The flame retardant and smoke suppression mechanism of magnesium hydroxide: Magnesium hydroxide is thermally decomposed to produce magnesium oxide and water, which is an endothermic reaction that can absorb heat from the surrounding air and reduce the temperature of the combustion site.
The water vapor generated by thermal decomposition replaces the surrounding oxygen, providing inert gas protection; The generated magnesium oxide and carbonization products quickly form a hard protective layer, isolating the external air and further hindering combustion.
This protective layer effectively reduces the smoke density by adsorbing coal smoke particles.
Aluminum hydroxide begins to release water at approximately 210 ℃, while magnesium hydroxide typically releases water at temperatures around 340 ℃.
Compared with aluminum hydroxide, magnesium hydroxide has a higher thermal decomposition temperature and can tolerate higher processing temperatures.
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