Messi Biology stated that magnesium carbonate not only provides foaming effect in the production process of phenolic resin foam, but also gives it more functions by improving the material’s multiple properties, especially in improving fire resistance and There are important applications in thermal stability. The multiple functions of magnesium carbonate in phenolic resin foam glue are mainly reflected in the following aspects:
1. Effect of foaming agent: Magnesium carbonate will decompose at high temperatures and release carbon dioxide gas (CO₂). This gas release can form bubbles in the phenolic resin, thereby playing a foaming role, helping the resin to form a foam structure and improving the lightweight properties of the material.
2. Refractory resistance of reinforced materials: Magnesium carbonate itself has good refractory properties and can improve the high temperature resistance of phenolic resin foam. This is particularly important for applications in areas where fire resistance and heat resistance (such as construction, automobile industry, etc.).
3. Improve thermal stability: The decomposition temperature of magnesium carbonate is high, so it can improve the thermal stability of phenolic resin foam glue and avoid premature decomposition or performance degradation in high temperature environments.
4. Improve mechanical properties: Adding an appropriate amount of magnesium carbonate to the phenolic resin will help improve the structure of the foam, improve the overall strength and toughness of the foam glue, and enhance the compressive and wear resistance of the material.
5. Promote the resin cross-linking reaction: Magnesium carbonate may participate in the cross-linking reaction of phenolic resins, improve the cross-linking density of the resin, and thereby enhance the chemical corrosion resistance of foam glue.
6. Environmental friendly: Compared with some chemical foaming agents, magnesium carbonate is relatively environmentally friendly, does not release harmful gases, and has a smaller burden on the environment.