1. Flame Retardant Magnesium Hydroxide
Magnesium hydroxide is a new type of inorganic filled flame retardant. It is an inorganic powder formed by pulverizing natural brucite powder. It is also called brucite powder and is white in color. Because of its non-toxic, smoke-free and good flame-retardant effect, it is an important inorganic flame retardant for smoke reduction, smoke-free and smoke suppression.
1. The powder is evenly distributed, has good compatibility with basic materials, and has little impact on the mechanical properties of the product.
2. High product content and good flame retardant performance
3. The product has good activation effect, high degree of activation and good fusion
4. Large filling volume can greatly reduce the cost of cable materials
5. High processing temperature (the decomposition temperature of magnesium hydroxide is 330 degrees, 100 degrees higher than aluminum hydroxide) speeds up the extrusion speed, improves the plasticizing effect, and the surface gloss of the product is high
6. Low price, half the price of aluminum hydroxide that achieves the same flame retardant effect.
Magnesium hydroxide is widely used in PE, PP, PVC, abs, ps, hips, pa, pbt, unsaturated polyester, epoxy resin, rubber, flame retardant filler for paint, chemical industry, environmental protection, plastics and other industrial fields; environmental protection flue gas desulfurizer; replace caustic soda and lime as a neutralizer for acidic wastewater; oil additives that play anti-corrosion and desulfurization functions can also be used in the electronics industry, insulation materials and other magnesium salt products
4. Preparation of magnesium hydroxide
Flame Retardant Magnesium hydroxide has all the characteristics required for use as a flame retardant filler. It can be made synthetically with high purity and in a range of useful morphologies, responds well to surface modifiers and decomposes endothermically with release of water at temperatures close to those of polymer degradation and high enough to allow incorporation into most polymer types. Crystal growth is difficult and, until recently, particles with suitable morphologies were too expensive for other than niche applications. New production methods are now available that offer the prospect of improved morphology control and better cost effectiveness.
The two most important aspects to control in the preparation of magnesium hydroxide are: (1) Filtration performance. If the magnesium hydroxide slurry has poor settling performance, it will affect the washing and separation operation process, lead to a prolonged magnesium hydroxide synthesis cycle, and affect hydroxidation. The output of magnesium; (2) Control the morphology, because magnesium hydroxide with a regular shape has better flame retardant effect, so it is necessary to adopt appropriate production methods and process conditions to meet the requirements.
The main production processes of magnesium hydroxide include direct precipitation method, magnesium-containing ore grinding method, magnesium oxide hydration method, etc.
Flame retardants are chemical additives used in plastics, coatings, and other products to inhibit flame sustenance.Magnesium hydroxide is used with a resin or similar base material as a flame retardant filler. This magnesia compound is physically mixed with the base material ( and “additive flame retardant”).
The basic mechanisms of retardancy can function in the gaseous and solid phase. When flame retardant chemicals act in the gaseous phase, they can also suppress smoke. Magnesium hydroxide is such a retardant.
Flame Retardant Magnesium Hydroxide Attributes and benefits:
- Excellent flame retardancy and smoke suppression properties
- Thermally stable
- Cost effective replacement for Alumina Trihydrate (ATH)
- Thermally stable to 340°C, suitable for engineering plastic
- Lower hardness than ATH resulting in longer equipment life
- Low toxicity [LD50 (oral/rat) > 5,000 Mg/Kg]
- Non-corrosive as compared to halogen or phosphorous-containing compounds