Hydrotalcite-ammonium polyphosphate compound and preparation method, application and composition thereof
A technology of ammonium polyphosphate and hydrotalcite, applied in the fields of uses and compositions, magnesium-aluminum hydrotalcite-polymeric ammonium phosphate composites and preparation methods, can solve problems such as low flame retardant efficiency, and achieve improved thermal stability and flame retardant. sexual effect
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[0037]
[0038] The preparation method of the hydrotalcite-ammonium polyphosphate compound of the present invention comprises the following steps: reacting soluble inorganic magnesium salt, soluble inorganic aluminum salt, soluble inorganic yttrium salt and ammonium polyphosphate to obtain a reaction product.
[0039] The soluble inorganic magnesium salt can be selected from one or more of magnesium chloride, magnesium nitrate, and magnesium sulfate. According to one embodiment of the present invention, the soluble inorganic magnesium salt is magnesium chloride. The soluble inorganic aluminum salt can be selected from one or more of aluminum chloride, aluminum nitrate, and aluminum sulfate. According to one embodiment of the present invention, the soluble inorganic aluminum salt is aluminum chloride. The soluble inorganic yttrium salt is selected from one or more of yttrium chloride, yttrium nitrate, and yttrium sulfate. According to one embodiment of the present invention...
Embodiment 1
[0064] (1) 50g of ammonium polyphosphate and 200mL of deionized water were stirred at 50°C and 500r / min to form a dispersion liquid.
[0065] (2) 3.82g of anhydrous magnesium chloride, 2.40g of anhydrous aluminum chloride, 0.61g of yttrium chloride hexahydrate and 100mL of deionized water were formed into a mixed solution.
[0066] (3) The mixed solution is slowly added dropwise to the dispersion liquid to obtain the liquid to be reacted; the sodium hydroxide solution of 4mol / L is added dropwise to the liquid to be reacted, and the pH of the liquid to be reacted is adjusted to 10; The mixture was hydrothermally reacted at 100°C for 24 hours to obtain the reaction product.
[0067] (4) The reaction product was alternately washed three times with water and ethanol, then placed in a vacuum drying oven, and vacuum-dried at 80° C. for 12 hours. Grinding the dried reaction product into powder to obtain hydrotalcite-ammonium polyphosphate composite.
[0068] figure 1 It is the Fou...
Embodiment 2～4 and comparative example 1
[0071] The polylactic acid and the hydrotalcite-ammonium polyphosphate composite prepared in Example 1 were vacuum-dried at 70° C. for 12 hours, respectively. An appropriate amount of dried polylactic acid, dried hydrotalcite-ammonium polyphosphate composite and plasticizer tributyl citrate are uniformly mixed, and then melted and blended in a twin-screw extruder to obtain a polylactic acid composition. The process parameters of the twin-screw extruder are as follows: the temperature of the upper cavity plate is 170° C., the temperature of the lower cavity plate is 175° C., and the screw speed is 40 rpm. The dosages of dried polylactic acid, dried hydrotalcite-ammonium polyphosphate composite and plasticizer are shown in Table 1.
[0072] Table 1
[0073] Example 2 Example 3 Example 4 Comparative example 1 Dried polylactic acid (g) 47.5 45 42.5 50 Dried hydrotalcite-ammonium polyphosphate complex (g) 2.5 5 7.5 — Plasticizer (g) 0.75 ...
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Abstract
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