Phosphaphenanthrene polyamide flame retardant and preparation and application thereof
A technology of heterophenanthrene polyamide and flame retardant, which is applied in the field of polymers, can solve problems such as inconsistent product quality and uneven mixing, and achieve the best use effect, good thermal stability, and good flame retardancy
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Embodiment 1
[0033] Add 90g of DOPO into a 250ml reactor, heat it to 120°C until it melts, and gradually add 60g of unsaturated polystyrene with maleic acid, fumaric acid, and ethylenediamine as the main components, with a molecular weight of 600 and an acid value of 18mgKOH / g under stirring. Amide: After the addition, keep at 130°C, react under reduced pressure at 0.1MPa for 2 hours, then raise the temperature to 140°C for 3 hours, discharge the material under heating, cool to obtain a glassy solid, and pulverize to obtain the final product. According to the GPC method, the number average molecular weight of the product is about 3100.
Embodiment 2
[0035] Add 88g DOPO into a 250ml reactor, heat it to 130°C until it melts, and gradually add 80g of unsaturated polyamide with itaconic acid and ethylenediamine as main components, molecular weight of 3500, and acid value of 15mgKOH / g under stirring; Then add 0.5g of aluminum triisopropoxide to maintain 140°C and 0.1MPa for 2h under reduced pressure, then raise the temperature to 160°C for 3h, discharge the material under heating, cool to obtain a glassy solid, and pulverize it to become the final product. According to the GPC method, the number average molecular weight of the product is about 8200.
Embodiment 3
[0037]Add 85g DOPO into a 250ml reactor, heat it to 140°C until it melts, and gradually add 90g of unsaturated polyamide with fumaric acid and propylenediamine as main components, molecular weight 7000, and acid value 8mgKOH / g under stirring; Then add 0.2g of triethylamine to maintain 140°C and 0.1MPa to react under reduced pressure for 3 hours, then raise the temperature to 180°C and react for 5 hours, discharge the material under heating, cool to obtain a glassy solid, and pulverize it to become the final product. According to the GPC method, the number average molecular weight of the product is about 14000.
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