Polyester industrial yarn for high-altitude operation safety belt and preparation method thereof
A polyester industrial yarn and high-altitude operation technology, applied in rayon manufacturing, melt spinning, filament/thread forming, etc., can solve problems such as high energy consumption, poor dyeing performance of polyester fibers, and restrictions on the application of high-strength polyester fibers
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Embodiment 1
[0062] A preparation method of polyester industrial yarn used for high-altitude work safety belt, the specific steps are as follows:
[0063] (1) prepare modified polyester;
[0064] (1.1) Synthesis of 2,2,5,5-tetramethyl-3,4-hexanediol, the method is: first, the molar ratio of 2,2-methylpropanal and sulfuric acid is 1.5:1 2,2-Methylpropionaldehyde solution with a concentration of 320g / L and dilute sulfuric acid solution with a concentration of 200g / L are mixed and added to the cathodic electrolytic cell, and then the mixed solution is cooled to 12°C, followed by electrolytic reduction to 2,2 -The concentration of methylpropionaldehyde is 9.5wt%, and finally cooling crystallization, separation and purification are carried out, and the schematic diagram of the reaction device adopted in the synthesis process is as follows figure 1 As shown, the reaction chemical equation is as follows:
[0065]
[0066] The structural formula of the prepared 2,2,5,5-tetramethyl-3,4-hexanedio...
Embodiment 2
[0091] A preparation method of polyester industrial yarn used for high-altitude work safety belt, the specific steps are as follows:
[0092] (1) prepare modified polyester;
[0093] (1.1) Synthetic 2,2,5,5-tetramethyl-3,4-diethyl-3,4-hexanediol, the method is: at first, press 2,2-dimethyl 3-pentanone and The molar ratio of sulfuric acid is that the ratio of 1.6:1 concentration is that the 2,2-dimethyl 3-pentanone solution of 350g / L and the dilute sulfuric acid solution of 210g / L are mixed and added in the cathodic electrolytic cell, then, the mixed Liquid cooling to 11 ° C, followed by electrolytic reduction to a concentration of 9.0 wt% of 2,2-dimethyl-3-pentanone, and finally cooling crystallization, separation and purification, the reaction device used in the synthesis process and the reaction chemical equation Consistent with Example 1, the structural formula of the prepared 2,2,5,5-tetramethyl-3,4-diethyl-3,4-hexanediol is shown in formula (I), where R for -CH 2 CH 3...
Embodiment 3
[0108] A preparation method of polyester industrial yarn used for high-altitude work safety belt, the specific steps are as follows:
[0109] (1) prepare modified polyester;
[0110] (1.1) Synthesis of 2,2,4,4-tetramethyl-3,4-di-tert-butyl-3,4-hexanediol, the method is: first, according to 2,24,4-tetramethyl 3- The molar ratio of pentanone to sulfuric acid is 1.7:1. Mix the 2,24,4-tetramethyl-3-pentanone solution with a concentration of 340g / L and the dilute sulfuric acid solution with a concentration of 230g / L into the cathode electrolytic cell , and then, the mixed solution was cooled to 10°C, followed by electrolytic reduction to a concentration of 9.6 wt% of 2,24,4-tetramethyl-3-pentanone, and finally cooled crystallization, separation and purification, using the The reaction device and reaction chemical equation are consistent with embodiment 1, and the structural formula of the 2,2,4,4-tetramethyl-3,4-di-tert-butyl-3,4-hexanediol that makes is as formula (Ⅰ ), where R ...
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