Halogen-free flame-retardant polypropylene composite for auto fuse holder, preparation method and application
A flame-retardant polypropylene and fuse box technology, applied in the field of modified plastics, to achieve the effects of excellent folding resistance, high heat distortion temperature, and high CTI value
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Embodiment 1
[0041] A preparation method for a halogen-free flame-retardant polypropylene compound for an automobile fuse box, comprising the following steps:
[0042] Graft 40 kg of polypropylene PP S700, 42.5 kg of polypropylene PP SM256, 0.3 kg of phenolic heat stabilizer Irganox 1010 (CIBA company), 0.2 kg of processing aid EBS, and 2 kg of glycidyl methacrylate (GMA) Polypropylene, 10 kg of intumescent flame retardant FP-2200, and 5 kg of talc powder are melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 1:40. The flame retardant is added from the side feed, and the extrusion temperature is 200 °C, extruded and granulated to obtain a halogen-free flame-retardant polypropylene compound for automobile fuse boxes.
[0043] The properties of the resulting product are as follows:
[0044] performance
[0045] Number of folds
Embodiment 2
[0047] A preparation method for a halogen-free flame-retardant polypropylene compound for an automobile fuse box, comprising the following steps:
[0048] 50 kg of polypropylene PP BX3800, 21 kg of polypropylene PP SM198, 0.5 kg of phenolic heat stabilizer Irganox 1010 (CIBA company), 0.5 kg of processing aid EBS, 3 kg of maleic anhydride (MAH) grafted polypropylene, 15 Kilograms of intumescent flame retardant FP-2200 and 10 kilograms of wollastonite were melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 1:40. The flame retardant was fed from the side, and the extrusion temperature was 200°C. Through granulation, a halogen-free flame-retardant polypropylene compound for automobile fuse boxes is obtained.
[0049] The properties of the resulting product are as follows:
[0050] performance
Embodiment 3
[0052] A preparation method for a halogen-free flame-retardant polypropylene compound for an automobile fuse box, comprising the following steps:
[0053] 60 kg of polypropylene PP RP346R, 0.5 kg of phenolic heat stabilizer Irganox 1010 (CIBA company), 0.5 kg of processing aid calcium stearate, 4 kg of maleic anhydride (MAH) grafted polypropylene, 20 kg of intumescent flame retardant FP-2200 and 15 kg of kaolin were melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 1:40. The flame retardant was added from the side feed, and the extrusion temperature was 200 ° C. Extruded and granulated to obtain automobile Halogen-free flame retardant polypropylene compound for fuse box.
[0054] The properties of the resulting product are as follows:
[0055] performance
[0056] Tensile Strength
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