High efficiency halogen-free flame retardant polypropylene composite material and its preparation method
A technology of flame-retardant polypropylene and composite materials, which is applied in the field of flame-retardant polypropylene materials, can solve the problems of low flame-retardant efficiency and high water solubility, and achieve the effects of high flame-retardant efficiency, low smoke density, and small smoke emission
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[0026] Example 1
[0027] Accurately weigh 0.67kg of ammonium polyphosphate (APP), 0.33kg of pentaerythritol phosphate (PEPA), 0.015kg of antioxidant, and 0.005kg of zinc stearate, and premix them in a high-speed dispersant for 5 minutes to obtain a halogen-free flame retardant. compound; then add 3.98kg of polypropylene pellets into the above-mentioned high-speed disperser, stir for 8 minutes, and then put the above-mentioned mixture into the twin-screw extruder for extrusion, cooling and granulation to obtain halogen-free resistance. Combustible polypropylene composite. Among them, the temperature of each zone of the twin-screw extruder is 150-200°C. The oxygen index of the polypropylene composite is 27.0%, and the UL-94 test reaches a V-0 rating. In this embodiment, the antioxidant is 1010 or 168, and one or more mixtures of stearic acid, calcium stearate, and polypropylene wax can also be used to replace zinc stearate. Ammonium polyphosphate (APP) is a high degree o...
Example Embodiment
[0031] Example 2
[0032] Accurately weigh 0.67kg of ammonium polyphosphate (APP), 0.33kg of pentaerythritol phosphate (PEPA), 0.015kg of antioxidant, 0.005kg of calcium stearate, and 0.10kg of manganese dioxide, and premix them in a high-speed dispersant for 10 minutes to obtain Halogen-free flame retardant compound; then add 3.88kg of polypropylene pellets into the above-mentioned high-speed disperser and stir for 10 minutes; then put the above-mentioned mixture into the twin-screw extruder for extrusion, cooling and granulation, namely Halogen-free flame retardant polypropylene composites are available. Wherein, the temperature of each zone of the twin-screw extruder is set at 150-200°C. The oxygen index of the polypropylene composite is 31.0%, and the UL-94 test reaches a V-0 rating. In this embodiment, one or more mixtures of zinc oxide and nano-silicon dioxide can also be used to replace manganese dioxide, and the antioxidant is 1010 or 168, and stearic acid, zinc stea...
Example Embodiment
[0037] Example 3
[0038]Accurately weigh 0.67 kg of ammonium polyphosphate (APP), 0.33 kg of pentaerythritol phosphate (PEPA), 0.015 kg of antioxidant, 0.005 kg of stearic acid, and 0.05 kg of zinc oxide, and pre-mix them in a high-speed dispersant for 20 minutes to obtain no Halogen flame retardant; then add 3.93kg of polypropylene pellets into the above-mentioned high-speed disperser, stir for 20 minutes; then put the above-mentioned mixture into a twin-screw extruder for extrusion, cooling and granulation to obtain Halogen-free flame retardant polypropylene composite. Wherein, the temperature of each zone of the twin-screw extruder is set at 150-200°C. The oxygen index of the polypropylene composite is 29.0%, and the UL-94 test achieves a V-0 rating. In this embodiment, one or more mixtures of manganese dioxide and nano-silicon dioxide can also be used to replace zinc oxide, and the antioxidant is 1010 or 168. Calcium stearate, zinc stearate, polypropylene wax can also b...
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