A kind of preparation technology of heat-resistant protective fabric
A preparation process and heat-resistant technology, which is applied in the field of preparation of heat-resistant protective fabrics, can solve the problems of anti-ultraviolet component stripping, content reduction, and affecting anti-ultraviolet performance
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Embodiment 1
[0030] The specific preparation method of silyl hindered amines (Si-HALSs) is:
[0031]2,2,6,6 Tetramethylpiperidone is dissolved in acetone to form a reaction solution with a mass concentration of 40%, and then 3-glycidyl etheroxypropyl triethoxysilane and the configured reaction solution are simultaneously Add it to the reaction tank, control the ratio of the amount of 2,2,6,6 tetramethylpiperidone and 3-glycidyl etheroxypropyl triethoxysilane to 1:0.95, and heat up to 70-75 Reflux at ℃ for 2-3 hours, then distill to recover acetone to obtain a solid product, wash the solid product with water 4-5 times and dry to obtain silyl hindered amine Si-HALSs, the reaction formula is as follows:
[0032]
Embodiment 2
[0037] The preparation method of anti-ultraviolet dibenzoic acid is as follows:
[0038] Step 1: Add 21g of sodium hydroxide solution with a mass concentration of 2% and 700g of acetone into the reaction tank at the same time, raise the temperature to 70°C, and then add 100g of 2-[2-hydroxyl-5-[2-(methacryloyl Oxygen) ethyl] phenyl] -2H-benzotriazole and the silyl hindered amine prepared in Example 1 prepared by 65g hindered amine, constant temperature reflux reaction for 8h, the solvent was recovered by distillation under reduced pressure until the reactant was viscous, Discharge the material while it is hot, precipitate crystals after cooling slightly, filter, wash and dry to obtain a dibenzotriazole-based hindered amine, the reaction formula is as follows:
[0039]
[0040] Step 2: Add 190g of aniline with a mass concentration of 98% into the reaction tank, stir and heat to 80°C, add 1.71kg of acetone solution and 1.25kg of hydrochloric acid solution with a mass concentr...
Embodiment 3
[0052] A preparation process of a heat-resistant protective fabric, the specific preparation process is as follows:
[0053] The first step, in the reaction tank, continuously pass nitrogen for 20-30min, then add 21.3g 4,6-diaminoresorcinol dihydrochloride, 104.8g anti-ultraviolet dibenzoic acid prepared in Example 2, 4.32 g of terephthalic acid, 0.72g of stannous chloride and 825g of polyphosphoric acid, heated to 80-83°C for 1.5h under the protection of nitrogen, then added 67g of phosphorus pentoxide to it, heated to 130°C for 3h, then heated React at 160°C for 13 hours, raise the temperature to 180°C for 10 hours, wash the obtained product with deionized water and ethanol for 5-8 times, and then dry to obtain a heat-resistant polymer;
[0054] In the second step, the heat-resistant polymer prepared in the first step is added to a twin-screw extruder for melt extrusion, and then spun by a dry-wet spinning method, and then washed and dried to obtain fiber filaments, and then...
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