New process for preparing modified melamine polyphosphate
A melamine polyphosphate, melamine technology, applied in the direction of organic chemistry, can solve the problems of plastic products harm, weight loss, difficult to control MPOP and other problems
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[0026] Example 1
[0027] In a 3000ml reactor equipped with a stirrer and a thermometer, first add 1467g of water, then add 228g of 85% phosphoric acid, and 35g of crystalline type II ammonium polyphosphate (APP-II, polymerization degree n>1000), and heat to 70 Then slowly add 294 g of melamine, and continue heating to about 95°C for reaction for 2 hours. Cool to about 40°C or room temperature in air or water bath, and then carry out solid-liquid separation. The filter cake was dried at 130°C for 8 hours to obtain the product. Take 100 g of the product, and then polymerize it at 330° C. for 90 minutes, then cool the reaction product at room temperature and pulverize to obtain a modified melamine polyphosphate with a white powder appearance. Performance data is shown in Table 1.
Example Embodiment
[0028] Example 2
[0029] In a 3000ml reactor equipped with a stirrer and a thermometer, first add 1467g of water, then add 228g of 85% phosphoric acid, and 17.5g of crystalline type II ammonium polyphosphate (APP-JI, degree of polymerization n>1000), add slowly 300g of melamine, and then continue to heat to 95°C for 4 hours. Cool to 30°C at room temperature, and then perform solid-liquid separation. The filter cake was dried at 130°C for 6 hours to obtain the product. Take 100 g of the product for polymerization at 350° C. for 70 minutes, and then cool the reaction product at room temperature and pulverize to obtain a modified melamine polyphosphate whose appearance is white powder. Performance data is shown in Table 1.
Example Embodiment
[0030] Example 3
[0031] In a 3000ml reactor equipped with a stirrer and a thermometer, first add 1467g of water, then add 228g of 85% phosphoric acid, and 26.3g of crystalline type II ammonium polyphosphate (APP-II, degree of polymerization n>1000), add slowly 300g of melamine, and then continue to heat up to 98°C and react for 3 hours. Cool to 40°C at room temperature, and then perform solid-liquid separation. The filter cake was dried at 130°C for 6 hours to obtain the product. 100 g of the product was polymerized and reacted at 450° C. for 20 minutes, and then the reaction product was cooled at room temperature and pulverized to obtain a modified melamine polyphosphate whose appearance was a white powder. Performance data is shown in Table 1.
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