In-situ coated red phosphorus flame retardant, flame-retardant polyamide material based on in-situ coated red phosphorus flame retardant and preparation method of flame-retardant polyamide material
A technology of red phosphorus flame retardant and flame retardant polyamide, which is applied in the field of polyamide in-situ coating red phosphorus flame retardant, flame retardant polyamide material and its preparation, flame retardant polyamide composite material and its preparation field, can Solve the problems of complex production process, easy damage of the coating layer, easy damage of the coating layer, etc., and achieve the effects of excellent comprehensive performance, prevention of damage, and reduction of safety risks
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Embodiment 1
[0037] This example proposes an in-situ coated red phosphorus flame retardant.
[0038] The in-situ coated red phosphorus flame retardant is made of red phosphorus powder and caprolactam monomer as raw materials, and is prepared after the stage of molecular activation and in-situ coating of red phosphorus powder. The details are summarized as follows:
[0039] Molecular activation stage: Put the caprolactam monomer into the reaction kettle, heat and melt it, when the temperature reaches 130°C, add sodium hydroxide according to 0.08% of the mass of the caprolactam monomer, stir evenly, react and dehydrate, and then keep the vacuum Pressure at 0.09MPa, after 20min, stop vacuuming and return to normal pressure.
[0040] In-situ coating red phosphorus powder stage: pump caprolactam after activated molecules into the mixing tank, add untreated red phosphorus powder with an average particle size of 200μm, polyisocyanate and mix evenly, and mix the materials together Put it into the...
Embodiment 2
[0043] This example proposes an in-situ coated red phosphorus flame retardant.
[0044] The in-situ coated red phosphorus flame retardant is made of red phosphorus powder and caprolactam monomer as raw materials, and is prepared after the stage of molecular activation and in-situ coating of red phosphorus powder. The details are summarized as follows:
[0045] Molecular activation stage: Put the caprolactam monomer into the reaction kettle, heat and melt it, when the temperature reaches 140°C, add sodium hydroxide according to 0.12% of the mass of the caprolactam, stir evenly, react and dehydrate, and then keep the vacuum degree at 0.1Mpa, after 15 minutes, stop vacuuming and return to normal pressure.
[0046] In-situ coating red phosphorus powder stage: pump the activated caprolactam into the mixing tank, add low molecular weight liquid substances with an average particle size of 5 μm, such as silicone oil, paraffin oil and other treated red phosphorus powder, poly After th...
Embodiment 3
[0049] This example proposes an in-situ coated red phosphorus flame retardant.
[0050] The in-situ coated red phosphorus flame retardant is made of red phosphorus powder and caprolactam monomer as raw materials, and is prepared after the stage of molecular activation and in-situ coating of red phosphorus powder. The details are summarized as follows:
[0051] Molecular activation stage: Put the caprolactam in the reaction kettle, heat and melt it, when the temperature reaches 140°C, add sodium hydroxide according to 0.10% of the mass of the caprolactam, stir evenly, react and dehydrate, and then keep the vacuum at 0.09MPa After 20 minutes, stop vacuuming and return to normal pressure.
[0052] In-situ coating red phosphorus powder stage: pump the caprolactam monomer after activated molecules into the mixing tank, add the red phosphorus powder treated with low molecular weight liquid substances with an average particle size of 20 μm, such as silicone oil, paraffin oil, etc. ,...
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Abstract
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