Low-addition-amount halogen-free flame-retardant polypropylene material and preparation method thereof
A flame-retardant polypropylene and additive technology, which is applied in the field of flame-retardant materials, can solve the problems of affecting the mechanical properties of flame-retardant polypropylene, limiting the application of flame-retardant polypropylene, and increasing material costs, so as to achieve low cost and promote char formation , the effect of reducing the amount of addition
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Embodiment 1
[0026] Add 82.0g of polypropylene, 3.2g of pentaerythritol, 9.6g of ammonium polyphosphate, 3.2g of melamine, and 2.0g of aluminum phosphate into a high-speed mixer and mix evenly. out, and then cooled and pelletized to obtain a flame-retardant polypropylene material. Wherein, the rotational speed of the twin-screw extruder is 30rpm, and the processing temperature is 190-230°C. The obtained flame-retardant polypropylene can pass the V-0 level (3.2mm) of the UL-94 test, and the limiting oxygen index can reach 30.6%.
[0027] In the flame-retardant polypropylene material obtained in Example 1, the addition amount of the flame-retardant system is only 18.0 wt%, while most of the existing flame-retardant polypropylenes reach the V-0 level, the addition amount of the flame retardant is at least It is 25.0wt%. Therefore, the present invention significantly improves the flame retardant efficiency of the flame retardant and reduces the added amount of the flame retardant.
Embodiment 2
[0029] 82.0g polypropylene, 4.0g dipentaerythritol, 12.0g ammonium polyphosphate, and 2.0g aluminum hypophosphite were added to a high-speed mixer and mixed evenly, and the resulting mixture was added to a twin-screw extruder for blending and extrusion. Then cool and cut into pellets to obtain flame-retardant polypropylene material. Wherein, the rotational speed of the twin-screw extruder is 30rpm, and the processing temperature is 190-230°C. The obtained flame-retardant polypropylene can pass the V-0 level (3.2mm) of the UL-94 test, and the limiting oxygen index can reach 31.3%.
[0030] For the flame retardant polypropylene material obtained in Example 2, the addition amount of the flame retardant system is only 18.0wt%, while most of the existing flame retardant polypropylenes reach the V-0 level, the addition amount of the flame retardant is at least It is 25.0wt%. Therefore, the present invention significantly improves the flame retardant efficiency of the flame retardan...
Embodiment 3
[0032] Add 82.0g of polypropylene, 4.0g of triazine compounds, 12.0g of melamine phosphate, and 2.0g of aluminum diethyl hypophosphite into a high-speed mixer and mix evenly, then add the resulting mixture into a twin-screw extruder for blending , extruded, and then cooled and pelletized to obtain a flame-retardant polypropylene material. Wherein, the rotational speed of the twin-screw extruder is 30rpm, and the processing temperature is 190-230°C. The obtained flame-retardant polypropylene can pass the V-0 level (3.2mm) of the UL-94 test, and the limiting oxygen index can reach 33.0%.
[0033] For the flame-retardant polypropylene material obtained in Example 3, the addition amount of the flame-retardant system is only 18.0 wt%, while most of the existing flame-retardant polypropylenes reach the V-0 level, and the addition amount of the flame retardant is at least It is 25.0wt%. Therefore, the present invention significantly improves the flame retardant efficiency of the fla...
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