A kind of flame retardant and its preparation method and application
A technology of flame retardant and flame retardant cotton, which is applied in the field of flame retardant and its preparation, can solve the problems of complex process, long production cycle, and formaldehyde release, and achieve high limiting oxygen index, good flame retardant effect, and short process flow Effect
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example 1
[0035] Weigh 8.408g of melamine, add 20mL of distilled water, stir evenly and then heat, when the temperature rises to 30°C, add 32.8g of phosphorous acid, when the temperature rises to 40°C, add 36mL of 36% formaldehyde solution, wait until the dropwise addition of formaldehyde is complete , heated to 100-105°C, refluxed for 2 hours to obtain MHMPA, which was separated and purified by recrystallization with absolute ethanol.
[0036] Then 50.0 g of MHMPA was weighed and 43.24 g of urea were reacted in 50 mL of water for 1 h at a reaction temperature of 100° C. to generate AMHMPA.
[0037] At room temperature, use AMHMPA, dicyandiamide and distilled water to prepare 1000mL of mixed solutions with concentrations of 50g / L and 30g / L, respectively, and then put ordinary pure cotton fabrics with a mass of 50g into the above mixed solution. Immerse in a water bath for 20min. After the impregnation is complete, take out the pure cotton fabric and roll it with a padder, and the liqui...
example 2
[0039] Weigh 13.873g of melamine, add 40mL of distilled water, stir evenly and heat, when the temperature rises to 30°C, add 54.12g of phosphorous acid, when the temperature rises to 40°C, add 59mL of 36% formaldehyde solution, wait until the dropwise addition of formaldehyde is complete , heated to 100-105°C, refluxed for 2 hours to obtain MHMPA, which was separated and purified by recrystallization with absolute ethanol.
[0040] Then weigh 70.0 g of MHMPA and 59.46 g of urea to react in 70 mL of water for 1 h at a reaction temperature of 100° C. to generate AMHMPA.
[0041] At room temperature, use AMHMPA, dicyandiamide and distilled water to prepare 1000mL of mixed solutions with a concentration of 70g / L and 30g / L respectively, then put ordinary pure cotton fabrics with a mass of 50g into the mixed solution, and place them in a constant temperature water bath at 50°C. Soak in water for 20min. After the impregnation is complete, take out the pure cotton fabric and roll it wi...
example 3
[0043] Weigh 17.657g of melamine, add 60mL of distilled water, stir evenly and heat, when the temperature rises to 30°C, add 68.88g of phosphorous acid, when the temperature rises to 40°C, add 76mL of 36% formaldehyde solution, wait until the dropwise addition of formaldehyde is complete , heated to 100-105°C, refluxed for 2 hours to obtain MHMPA, which was separated and purified by recrystallization with absolute ethanol.
[0044] Then weigh 90.0 g of MHMPA and 75.68 g of urea to react in 100 mL of water for 1 h at a reaction temperature of 100° C. to generate AMHMPA.
[0045] At room temperature, use AMHMPA, dicyandiamide and distilled water to prepare mixed solutions with concentrations of 90g / L and 30g / L, respectively.
[0046] 1000mL, and then put a 50g ordinary pure cotton fabric into the mixed solution, and soak it in a constant temperature water bath at 50°C for 20min. After the impregnation is complete, take out the pure cotton fabric and roll it with a padder, and t...
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