Method for preparing cooperative flame retardant nylon 6
A synergistic flame retardant and nylon technology, applied in the field of flame retardant composite material preparation, can solve the problem of no substitutes, and achieve the effect of small impact, small mechanical properties and cost reduction.
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[0013] With reference to the drawings, the preparation method of the synergistic flame-retardant nylon 6 of the present invention has the following steps:
[0014] The first step is to add sodium hydroxide aqueous solution to aluminum nitrate and magnesium nitrate aqueous solution for reaction at room temperature, and the reaction time is 1.5-3h; then add the dissolved sodium stearate aqueous solution to the aforementioned reaction system and continue the reaction The reaction time is 1.5-3h; the product is filtered, washed, and dried to obtain modified layered magnesium aluminum hydroxide powder. Among them, the molar ratio of sodium stearate, aluminum nitrate and magnesium nitrate is 0.8-1.2:1:3.
[0015] In the second step, weigh the microcapsule red phosphorus, modified layered magnesium aluminum double hydroxide powder and nylon 6 pellets, and dry them; among them, the microcapsule red phosphorus, layered magnesium aluminum double hydroxide powder and nylon 6 pellets In the m...
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[0017] Example 1
[0018] The preparation method of the synergistic flame-retardant nylon 6 of the present invention has the following steps:
[0019] The first step: Mix 60g melamine and 119.05g formaldehyde solution (36%), react at pH=9 and 80℃ for 25min to prepare prepolymer; add 5.5g ammonium persulfate and prepolymer to 300g red In a 1.2L aqueous solution of phosphorus (about 5000 mesh), the pH value is adjusted to 5, the temperature is controlled at 55°C, and the reaction is 1.5h; the product is filtered, washed, and dried to obtain microencapsulated red phosphorus;
[0020] Step 2: At room temperature, add 3L of 1.5M sodium hydroxide aqueous solution to 3L of 2M aluminum nitrate and 6M magnesium nitrate aqueous solution, and react for 1.5h; then, add 1L of dissolved 4.8M hardened to the aforementioned reaction system. Sodium fatty acid aqueous solution, react for 1.5h; the product is filtered, washed and dried to obtain modified layered magnesium aluminum hydroxide powder;
[...
Example Embodiment
[0024] Example 2
[0025] The preparation method of the synergistic flame-retardant nylon 6 of the present invention has the following steps:
[0026] The first step: Mix 60g of melamine and 119.05g of formaldehyde solution (36%), react at pH=9, 95°C for 45min to prepare a prepolymer; add 5.5g of potassium persulfate and the prepolymer to 360g of red In a 1.2L aqueous solution of phosphorus (about 5000 mesh), the pH value is adjusted to 6, the temperature is controlled at 75°C, and the reaction is 1.5h; the product is filtered, washed, and dried to obtain microencapsulated red phosphorus;
[0027] Step 2: At room temperature, add 3L of 1.5M sodium hydroxide aqueous solution to 3L of 2M aluminum nitrate and 6M magnesium nitrate aqueous solution, and react for 1.5h; then, add 1L of dissolved 7.2M hardened to the aforementioned reaction system. Sodium fatty acid aqueous solution, react for 1.5h; the product is filtered, washed and dried to obtain modified layered magnesium aluminum hyd...
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