Expansion type fire retardant material
A kind of flame retardant material and intumescent technology, which is applied in the field of flame retardant materials, can solve the problems of poor compatibility between flame retardant materials and polyolefins, environmental pollution, and large addition amount, and achieve good compatibility, environmental friendliness, and high addition amount small effect
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[0027] Example 1
[0028] In a three-necked flask, 19 g of pentaerythritol, 2.5 g of water, and 10 g of phosphorus pentoxide were added, placed in an oil bath at 75° C., and reacted with vigorous stirring for 6 hours; 12.6 g of melamine was added and reacted at 160° C. for 2 hours. After the reaction is over, the obtained product is washed with a large amount of deionized water until it is close to neutral. After the polypropylene is plasticized on a two-roll plastic mill, add 20% flame retardant and mix at 160°C for 10 minutes to make it evenly mixed. Then, it is hydraulically formed on a hot press at 185°C, and the universal sample preparation mechanism is used. Determine the flame retardant properties of the flame retardant and the mechanical properties of the prepared samples. The test result is that the oxygen index is 23, the horizontal combustion test is FH-2, and the tensile strength is 8.2MPa. Its infrared spectrum is as figure 1 Shown. Its specific...
Example Embodiment
[0029] Example 2
[0030] In a three-necked flask, 18 g of dipentaerythritol, 5 g of water, and 10 g of phosphorus pentoxide were added, placed in an oil bath at 90° C., and reacted with vigorous stirring for 4 hours; 12.6 g of melamine was added and reacted at 160° C. for 2 hours. After the reaction is over, the obtained product is washed with a large amount of deionized water until it is close to neutral. After the polypropylene is plasticized on a two-roll plastic mill, add 20% flame retardant and mix at 160°C for 10 minutes to make it evenly mixed. Then, it is hydraulically formed on a hot press at 185°C, and the universal sample preparation mechanism is used. Determine the flame retardant properties of the flame retardant and the mechanical properties of the prepared samples. The test result is that the oxygen index is 26, the horizontal combustion test is FH-2, and the tensile strength is 7.8MPa.
Example Embodiment
[0031] Example 3
[0032] In a three-necked flask, 13 g of tripentaerythritol, 10.1 g of water, and 20 g of phosphorus pentoxide were added, placed in an oil bath at 105° C., and reacted with vigorous stirring for 4 hours; 18.9 g of melamine was added and reacted at 170° C. for 2 hours. After the reaction is over, the obtained product is washed with a large amount of deionized water until it is close to neutral. After the polypropylene weighed in proportion is plasticized on a two-roll plastic mill, add flame retardant and mix for 10 minutes at 185°C to make it evenly mixed. Then, it is hydraulically formed at 185°C on a hot press. The universal sample preparation mechanism is used. . Determine the flame retardant properties of the flame retardant and the mechanical properties of the prepared samples. The test result is that the oxygen index is 28, the horizontal combustion test is FH-2, and the tensile strength is 7.5MPa.
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