Flame-retardant composite material and preparation method thereof
A composite material and flame retardant technology, which is applied in the field of flame retardant composite materials and their preparation, can solve the problems of large addition amount, high cost, reducing mechanical properties of polymer materials, etc. performance, the effect of good market application value
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[0029] The embodiment of the present invention also provides a method for preparing a composite material, which includes the following steps: mixing the polymer substrate, phosphogypsum and DOPO or its derivatives, and then performing molding treatment. The preparation process does not require complicated process steps, and the molding process can be adjusted according to the application situation to produce products that meet the requirements of the application scenario.
[0030] Specifically, the molding process is to melt and extrude the mixed raw materials, then cool and pelletize. The processing temperature of the melt extrusion process is 180-220°C, which can be carried out by using a twin-screw extruder. The materials are melted, extruded and mixed evenly at high temperature, and then cut into granules of required size after cooling.
[0031] Preferably, the polymer substrate, phosphogypsum and DOPO or its derivatives are dried separately before mixing the raw material...
Embodiment 1
[0034] This embodiment provides a flame-retardant composite material, which includes 92 parts of polymer base material, 0.1 part of phosphogypsum and 8 parts of DOPO in parts by mass; wherein, the polymer base material is polyethylene terephthalate The particle size of phosphogypsum is 5nm.
[0035] This embodiment also provides a method for preparing a composite material, comprising the steps of:
[0036] According to the above weight parts, take the polymer substrate, DOPO, and phosphogypsum to dry separately for later use; mix the above dried components evenly and put them into the extruder for melt blending. The processing temperature is: 180°C, after cooling , Diced.
Embodiment 2
[0038] This embodiment provides a flame-retardant composite material, which includes 87 parts of polymer base material, 3 parts of phosphogypsum and 10 parts of DOPO in parts by mass; wherein, the polymer base material is polybutylene terephthalate , The particle size of phosphogypsum is 50nm.
[0039] This embodiment also provides a method for preparing a composite material, comprising the steps of:
[0040]According to the above weight parts, take the polymer substrate, DOPO, and phosphogypsum to dry separately for later use; mix the above dried components evenly and put them into the extruder for melt blending. The processing temperature is: 220°C, after cooling , Diced.
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