Reactive flame retardant as well as preparation method and application thereof
A reactive flame retardant and solvent technology, used in the field of flame retardants, can solve problems such as fire hazards, and achieve the effects of convenient post-processing, mild conditions and simple preparation methods
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Embodiment 1
[0048] Add 25mL of tetrahydrofuran as a solvent to a 100mL three-neck flask equipped with a reflux condenser, a thermometer, and a stirring rod, and then add 3mL of xylene, heat to 80°C and stir evenly, then add 16.4g of TDCA (0.1mol), 37.2g of DMMP (0.3mol), in N 2 The reaction was maintained at 80°C for 5h under the atmosphere. After the reaction, the mixture was filtered, washed and dried to obtain the flame retardant as a white solid with a yield of 91%. The nuclear magnetic phosphorus spectrum of the obtained product is as follows figure 1 As shown, the infrared spectrum is shown in figure 2 As shown, the H NMR spectrum is shown as image 3 shown. Observation of the above drawings can prove that the target product has the structure shown in the above formula (I).
[0049]Mix 22 parts of the flame retardant prepared in this example with 78 parts of EP (product model 4926), and make a composite material by twin-screw extruder at 190°C.
[0050] Referring to the Ameri...
Embodiment 2
[0060] Add 62.5mL of acetonitrile as a solvent to a 250mL three-necked flask equipped with a reflux condenser, a thermometer and a stirring rod, then add 7.5mL of xylene, heat to 80°C and stir evenly, then add 41g of TDCA (0.25mol), 93g of DMMP (0.75mol), in N 2 The reaction was maintained at 80°C for 5h under the atmosphere. After the reaction, the mixture was filtered, washed and dried to obtain the flame retardant as a white solid with a yield of 79%.
[0061] Mix 22 parts of the flame retardant obtained in this example with 78 parts of EP (product model 4926), and make a composite material by twin-screw extruder at 190°C.
[0062] The above composite material is made into UL94 1.6mm standard sample in an injection molding machine, and the standard test is carried out on a horizontal and vertical combustion instrument and an oxygen index tester. After testing, the flame retardant grade of the sample is: UL94 1.6mm V-0 grade, oxygen index 30.
[0063] The above-mentioned ...
Embodiment 3
[0066] Add 250ml tetrahydrofuran as a solvent to a 1000mL three-necked flask equipped with a reflux condenser, a thermometer, and a stirring rod, then add 30mL of trimethylbenzene, heat to 80°C and stir evenly, then add 164g (1mol) of TDCA and 372gDMMP (3mol), in N 2 The reaction was maintained at 80°C for 5h under the atmosphere. After the reaction, the mixture was filtered, washed and dried to obtain a white solid with a yield of 84%.
[0067] Mix 22 parts of the flame retardant obtained in this example with 78 parts of EP (product model 4926), and make a composite material by twin-screw extruder at 190°C.
[0068] The above composite material is made into UL94 1.6mm standard sample in an injection molding machine, and the standard test is carried out on a horizontal and vertical combustion instrument and an oxygen index tester. After testing, the flame retardant grade of the sample is: UL94 1.6mm V-0 grade, oxygen index 30.
[0069] The above-mentioned composite material...
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