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A． Antimony Series Flame Retardant Advantages: antimony trioxide can not be used as a flame retardant, and the use of the appropriate halogen compound, it will play a particularly effective flame retardant performance. Antimony Series Flame Retardant synergistic mechanism disadvantage: heavy metals, toxic, and arsenic homologous, coarse products in general containing arsenic and other heavy metals, arsenic trioxide is arsenic.
Can not be used as green filler and green flame retardant.
Second, aluminum hydroxide flame retardant (ATH)
Advantages: Low price, good flame-retardant. Disadvantages: Heat resistance is poor, 200℃ start dehydration, 330 ℃ to 350 ℃ namely complete dehydration, and resin curing more in the aluminum hydroxide dehydration temperature range, resulting in synthetic resin foam, surface unevenness, dielectric performance, lower finished product rate. Applied to high temperature caused silica gel fog, product whitish foaming, dielectric decline.
EC≈60~100ΜS/CM, easy to absorb tide.
Magnesium hydroxide Flame Retardant
Advantages: Magnesium Hydroxide Flame Retardant application (430 ℃ decomposition) non-toxic Disadvantages: not acid, acetic acid can dissolve magnesium hydroxide, only suitable for low-grade products.
Easy to absorb moisture, dispersion poor, dielectric poor.
Four, high heat-resistant boehmite flame retardant (Boehmite, Alooh)
Advantages: 1% dehydration temperature of more than 350 ℃, 500 ℃ dehydration to peak, ec<50μs/cm, dielectric strong, the solution of aluminum hydroxide due to low dehydration temperature caused product defects and dielectric reduction problem, strong acid and alkali. Disadvantages: Flame retardant is slightly lower than aluminum hydroxide, to achieve the same flame-retardant performance needs to be added. But its biggest characteristic is the high heat resistance, both thermal conductivity, acid and alkali, makes the high heat-resisting function material may increase the product added value.