Comparison of Four Common Cable Flame Retardants
Aluminum hydroxide is one of the four commonly used cable flame retardants.
One. Antimony flame retardant
Advantages: Antimony trioxide cannot be used as a flame retardant alone, but can be used in combination with appropriate halogen compounds to exert particularly effective flame retardant properties. Antimony-based flame retardant synergy mechanism Disadvantages: heavy metal, toxic, homologues with arsenic, crude products generally contain other heavy metals such as arsenic, arsenic trioxide is arsenic. Cannot be used as green filler and green flame retardant.
Aluminum hydroxide flame retardant (ATH)
Advantages: low price, good flame retardancy.
Disadvantages: Poor heat resistance, dehydration starts at 200 ° C, complete dehydration at 330 ° C to 350 ° C, and the curing of the resin is mostly within the dehydration temperature range of aluminum hydroxide, which leads to foaming in the finished synthetic resin, uneven surface, dielectric properties Decreased, low yield. Applied to high temperature causes silica gel to fog, the product turns white and foaming, and the dielectric property decreases. EC Technologies 60~ 100 μS/cm, easy to absorb moisture.
Magnesium hydroxide flame retardant
Advantages: Magnesium hydroxide flame retardant application (430 ℃ decomposition) non-toxic
Disadvantages: No acid resistance, acetic acid can dissolve magnesium hydroxide, only suitable for low-grade products. Easy to absorb moisture, poor dispersion, poor dielectric.
High heat-resistant boehmite flame retardant (Boehmite, ALOOH)
Advantages: 1% dehydration temperature is above 350 ° C, dehydration reaches a peak value at 500 ° C, EC < 50 μS/cm, strong dielectric properties, solves the problem of product defects and reduced dielectric properties caused by low dehydration temperature of aluminum hydroxide, Strong acid and alkali resistance.
Disadvantages: The flame retardancy is slightly lower than that of aluminum hydroxide, and more needs to be added to achieve the same flame retardant performance. But its biggest feature is high heat resistance, both thermal conductivity and acid and alkali resistance. Making high heat resistance functional materials can improve the added value of products. (jwl)