Novel phosphor nitrogen composite combustion inhibitor
A compound flame retardant and flame retardant technology, which is applied in the direction of fireproof coatings, paper, etc., can solve the problems of complex production process, difficulty in realizing industrial production, and low yield, and achieve the effect of simple process
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Embodiment 1
[0018] Add 212g of phosphoric acid (85%) and 60g of urea in a four-necked flask equipped with a stirrer, a thermometer and a vent pipe, heat up to 80°C for 20 minutes, then slowly heat up to 195°C for 30 minutes, then cool to 90°C. Introduce 4 g of ammonia gas, the pH value reaches 6.5, then cool to normal temperature, and centrifuge to obtain 150 g of white solid product.
Embodiment 2
[0020] Add 1000g of phosphoric acid (85%) and 60g of urea in a four-necked flask equipped with a stirrer, a thermometer and a ventilation tube, heat up to 100°C for 20 minutes, then slowly heat up to 180°C for 30 minutes, and cool to 85°C. Introduce 40 g of ammonia gas, the pH value reaches 6, then cool to normal temperature, and centrifuge to obtain 450 g of white solid product.
Embodiment 3
[0022] Add 300g of phosphoric acid (85%) and 60g of urea in a four-necked flask equipped with a stirrer, a thermometer and a vent pipe, heat up to 110°C for 30 minutes, then slowly heat up to 170°C for 20 minutes, then cool to 80°C. 18 g of ammonia gas was introduced, and the pH value reached 6, then cooled to room temperature, and centrifuged to obtain 270 g of a white solid product.
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