A melamine-modified lignin/magnesium-aluminum hydroxide double-coated red phosphorus flame retardant and its application in cable materials
A technology of magnesium aluminum hydroxide and melamine, applied in LLDPE/EVA cable materials, the preparation field of melamine modified lignin/magnesium aluminum hydroxide double-coated red phosphorus flame retardant, which can solve the problem of phosphine Small amount, strong hygroscopicity, high ignition point of the product, etc., to achieve the effects of high flame retardant efficiency, good weather resistance, and good thermal stability
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Embodiment 1
[0029] Weigh 40.6g (0.2mol) magnesium chloride hexahydrate and 48.3g (0.2mol) aluminum chloride hexahydrate and dissolve in deionized water to form a salt solution; at the same time weigh 40g (1mol) sodium hydroxide in a beaker, add deionized A sodium hydroxide solution with a concentration of 4wt% was prepared with water, and 20 g of organic lignin was added into the lye, heated and stirred to dissolve. Pour the alkaline solution of lignin into a three-necked flask equipped with an electric stirrer, a thermometer, and a reflux condenser, add 32mL (0.4mol) of 38wt% formaldehyde solution, react at 80°C for 3h, and then add 25.6g (0.2mol ) melamine, after reacting for 3 hours, pour the reaction product in the there-necked bottle into a beaker, add 12g red phosphorus and 0.06g sodium dodecylbenzenesulfonate, and then slowly add magnesium aluminum salt solution after the red phosphorus is fully dispersed, The reaction was stirred for 2h. After aging the resulting suspension for 1...
Embodiment 2
[0031] Weigh 25.6g (0.1mol) of magnesium nitrate hexahydrate and 112.5g (0.3mol) of aluminum nitrate nonahydrate and dissolve them in deionized water to form a salt solution; meanwhile weigh 44g (1.1mol) of sodium hydroxide in a beaker and add to A sodium hydroxide solution with a concentration of 6wt% was prepared with ionized water, and 40 g of enzymatic lignin was added to the lye, heated and stirred to dissolve. Pour the alkaline solution of lignin into a three-necked flask equipped with an electric stirrer, a thermometer, and a reflux condenser, add 96mL (1.2mol) of 38wt% formaldehyde solution, react at 90°C for 2 hours, and then add 51.2g (0.4mol ) melamine, after reacting for 2 hours, pour the reaction product in the there-necked bottle into the beaker, add 32g of red phosphorus and 0.16g of sodium dodecylbenzenesulfonate, and then slowly add the magnesium-aluminum salt solution after the red phosphorus is fully dispersed, The reaction was stirred for 1 h. After aging ...
Embodiment 3
[0033]Weigh 60.9g (0.3mol) of magnesium chloride hexahydrate and 37.5g (0.1mol) of aluminum nitrate nonahydrate and dissolve them in deionized water to form a salt solution; meanwhile weigh 50.4g (0.9mol) of potassium hydroxide in a beaker, add to A potassium hydroxide solution with a concentration of 4wt% was prepared with ionized water, and 40 g of enzymatic lignin was added into the lye, heated and stirred to dissolve. Pour the alkaline solution of lignin into a three-necked flask equipped with an electric stirrer, a thermometer, and a reflux condenser, add 72mL (0.8mol) of butyraldehyde, react at 100°C for 1 hour, then add 51.2g (0.4mol) of melamine, After reacting for 1 hour, pour the reaction product in the there-necked flask into a beaker, add 24g of red phosphorus and 0.24g of sodium lauryl sulfate, and then slowly add the magnesium-aluminum salt solution after the red phosphorus is fully dispersed, and stir for 0.5 hours. After aging the suspension obtained from the r...
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