Low-chromatic-aberration polyester POY and preparation method thereof
A polyester and chromatic aberration technology, applied in the direction of single-component polyester rayon, rayon manufacturing, melt spinning, etc., can solve the problems of difficult dyeing, color flower, not easy to wash off, etc.
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Embodiment 1
[0066] A preparation method of polyester POY yarn with low color difference, the main process comprises:
[0067] (1) Preparation of catalyst magnesium ethylene glycol:
[0068] Add ethylene glycol into the single-chamber electrolytic cell, the supporting electrolyte is magnesium chloride, the metal magnesium block is the anode, and the cathode is graphite; connect direct current, the initial voltage is 6V, the cathode current density is 150mA, and electrolyze for 10 hours at 50°C. Take out the electrode to obtain a white suspension; filter under reduced pressure, wash the white solid with absolute ethanol, and dry to obtain magnesium ethylene glycol;
[0069] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:
[0070] Esterification reaction:
[0071] Use terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic acid is 1.2:1, add anti-ether agent sodium acetate, the amount of sodiu...
Embodiment 2
[0086] A preparation method of polyester POY yarn with low color difference, the main process comprises:
[0087] (1) Preparation of catalyst magnesium ethylene glycol:
[0088] Add ethylene glycol into the single-chamber electrolytic cell, the supporting electrolyte is magnesium chloride, the metal magnesium block is the anode, and the cathode is graphite; connect direct current, the initial voltage is 10V, the cathode current density is 200mA, electrolyze at 60°C for 12 hours, after the electrolysis ends Take out the electrode to obtain a white suspension; filter under reduced pressure, wash the white solid with absolute ethanol, and dry to obtain magnesium ethylene glycol;
[0089] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:
[0090] Esterification reaction:
[0091] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic acid is 2.0:1, adding anti-ether agent calci...
Embodiment 3
[0106] A preparation method of polyester POY yarn with low color difference, the main process comprises:
[0107] (1) Preparation of catalyst magnesium ethylene glycol:
[0108] Add ethylene glycol into the single-chamber electrolytic cell, the supporting electrolyte is magnesium chloride, the metal magnesium block is the anode, and the cathode is graphite; connect direct current, the initial voltage is 7V, the cathode current density is 160mA, and electrolyze for 11 hours at 55°C. Take out the electrode to obtain a white suspension; filter under reduced pressure, wash the white solid with absolute ethanol, and dry to obtain magnesium ethylene glycol;
[0109] (2) Preparation of polyester, including esterification reaction and polycondensation reaction:
[0110] Esterification reaction:
[0111] Using terephthalic acid and ethylene glycol as raw materials, the molar ratio of ethylene glycol to terephthalic acid is 1.5:1, adding anti-ether agent sodium acetate, the amount of ...
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