Acidic dyeable polyester and method for preparing acidic dyeable polyester and fiber thereof

A polyester fiber and acidic technology, which is applied in the field of acid dyeable polyester chips and fiber preparation, can solve the problems of poor compatibility between polyamide and polyester, achieve uniform dyeing, improve polyester acid dyeing performance, and simple operation Effect

Active Publication Date: 2009-06-10
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Another object of the present invention is to provide a method for preparing acid-dyeable polyester chips. By adding polyamide in the polyester polymerization process, the low-polyester and polyamide are copolymerized to prepare acid-dyeable amide chips. The polyester copolymer of the group makes it have affinity to acid dyes, and then processes and prepares polyester chips and fibers that can be acid dyed. More importantly, this method solves the problem of poor compatibility between polyamide and polyester. problems, and this preparation method can obtain polyesters that meet different requirements

Method used

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  • Acidic dyeable polyester and method for preparing acidic dyeable polyester and fiber thereof
  • Acidic dyeable polyester and method for preparing acidic dyeable polyester and fiber thereof
  • Acidic dyeable polyester and method for preparing acidic dyeable polyester and fiber thereof

Examples

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Effect test

Embodiment 1

[0040] Mix 800g of dimethyl terephthalate (DMT) with 546g of ethylene glycol and 0.27g of magnesium acetate evenly, then add it to the reaction kettle, raise the temperature to 200°C, and carry out the reaction for 30 minutes, when the fraction reaches 99% of the theoretical amount , to end the transesterification reaction. Transfer the product after the transesterification reaction to the polycondensation reactor, add 0.43g of antimony trioxide polycondensation catalyst and 115g of nylon 6 slices, then raise the temperature to 240°C, vacuumize to 70Pa, continue to heat up to 265°C, and carry out the reaction for 3 hours , when the intrinsic viscosity of the polyester in the kettle is 0.75dL / g, the material is discharged to prepare acid dyeable polyester chips with a melting point of 250-252°C, and the polyester contains 12% polyamide by weight. Vacuum-dry the above-mentioned acid dyeable polyester chips at 80°C for 4 hours and at 130°C for 8 hours to make the moisture content...

Embodiment 2

[0042] Mix 800g of dimethyl terephthalate (DMT) with 468g of ethylene glycol and 0.22g of manganese acetate, then add it into the reaction kettle, raise the temperature to 170°C, and carry out the reaction for 60 minutes, when the fraction reaches 98% of the theoretical amount , to end the transesterification reaction. Transfer the product after the transesterification reaction to the polycondensation reactor, add 0.4g of antimony trioxide polycondensation catalyst and 68g of nylon 66 slices, then raise the temperature to 245°C, vacuumize to 50Pa, continue to heat up to 260°C, and carry out the reaction for 4 hours , when the intrinsic viscosity of the polyester in the kettle is 0.72dL / g, the material is discharged to prepare acid dyeable polyester chips with a melting point of 250-252°C, and the polyester contains 5% polyamide by weight. Vacuum-dry the above-mentioned acid dyeable polyester chips at 80°C for 4 hours and at 130°C for 8 hours to make the moisture content reach ...

Embodiment 3

[0044] 1000g of terephthalic acid (PTA) and 830g of ethylene glycol were mixed evenly and added to the reactor, the temperature was raised to 260°C, and the reaction was carried out for 50 minutes. When the fraction reached 98% of the theoretical amount, the esterification reaction was terminated. The product after the esterification reaction was transferred to a polycondensation reaction kettle, and 0.68 g of antimony trioxide and 460 g of nylon 6 slices were added, vacuumed to 60 Pa, continued to heat up to 260 ° C, and reacted for 2 hours. The intrinsic viscosity of the polyester in the kettle was After 0.78dL / g, the material is discharged to prepare acid-dyeable polyester chips with a melting point of 250-252° C., and the polyester contains 20% polyamide by mass. . Vacuum-dry the prepared acid dyeable polyester chips at 80°C for 4 hours and at 125°C for 8 hours to make the moisture content reach 50-100ppm. / min, the draw ratio is 2.5, and the hot roll temperature is 160°C...

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Abstract

The invention relates to acidic dyeable polyester and a method for preparing acidic dyeable polyester chip and fiber. The method comprises the steps of performing transesterification or esterification to p-phenyl dimethyl formate or p-phenyl dicarboxylic acid and glycol, adding polyamide such as nylon 6 and / or nylon 66 during polyester polymerization so as to prepare polyester chip, drying the polyester chip and using a conventional spinning machine to spin so as to prepare the polyester fiber used for the dyeing of acid dye. The polyester fiber thoroughly solves the problem that polyester and polyamide are not compatible, ensures uniform dyeing of acid dye, and enables spinning workstage to proceed smoothly. In addition, as the preparation of the polymer adopts a process similar to polyester polymerization for polymerization on a common polyester polymerization device, the method is simple to operate, easy to perform industrial production and low in cost.

Description

technical field [0001] The invention relates to an acid dyeable polyester, and also relates to a preparation method of acid dyeable polyester chips and fibers. Background technique [0002] As the basic industry of the textile industry, chemical fiber has always been a key industry in my country's planned development. In recent years, my country's chemical fiber production has developed rapidly, and its production capacity has accounted for 1 / 3 of the world's chemical fiber production, of which polyester production accounts for 1 / 2 of the world's production, ranking first in the world, and the production capacity is still developing at a high speed. The center of polyester polyester development. Wherein polyester staple fiber has been used more and more for blending with wool etc. since it appeared on the market, for preparing wool polyester worsted fabrics. With the increase of polyester staple fiber in the preparation of fine-woven fabrics such as wool and polyester, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/46D01F6/84D06P1/39
Inventor 刘伯林白玲
Owner CHINESE TEXTILE ACAD
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