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Aliphatic-polyamide-modified copolyester, aliphatic-polyamide-modified copolyester fiber, and preparation methods thereof

A technology of aliphatic polyamide and copolyester, which is applied in the fields of fiber chemical characteristics, melt spinning method, stretch spinning method, etc. It can solve the problems of unstable spinning, poor heat resistance of polyester fiber, and affecting the performance of spinnable fabrics and other problems, to achieve the effect of reducing the crystallization performance and glass transition temperature

Active Publication Date: 2013-08-07
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduction of polyether segments in the polyester molecular chain will make the polyester fiber poor in heat resistance and unstable in spinning, which will affect the spinnability and the performance of the fabric.

Method used

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  • Aliphatic-polyamide-modified copolyester, aliphatic-polyamide-modified copolyester fiber, and preparation methods thereof

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preparation example Construction

[0029] At the same time, in one embodiment of the present invention, a preparation method of aliphatic polyamide modified copolyester is provided, comprising the following steps: mixing terephthalic acid with ethylene glycol, and obtaining esterification after esterification Product; Diethylene glycol isophthalate-5-sulfonic acid alkali metal salt and aliphatic polyamide are added in the esterification product, and copolymerization reaction obtains aliphatic polyamide modified copolyester; Wherein, terephthalic acid Formic acid, ethylene glycol, and diethylene glycol isophthalate-5-sulfonic acid alkali metal salt are added according to the molar ratio of 1:1.05~2:0.01~0.1, and the amount of aliphatic polyamide added is the weight of terephthalic acid 1~40wt%.

[0030] Preferably, in the preparation method of the above-mentioned aliphatic polyamide modified copolyester, the alkali metal salt of diethylene glycol isophthalate-5-sulfonic acid is added in an amount of 3 to 10 mol%...

Embodiment 1

[0042] Esterify terephthalic acid and ethylene glycol with a molar ratio of 1:1.1, the reaction temperature is 270°C, and the reaction time is 3h. Then add diethylene glycol isophthalate-5-potassium sulfonate equivalent to 1.5% molar weight of terephthalic acid and polycondensation catalyst III equivalent to 1wt% nylon 66 and 0.04wt% of terephthalic acid weight Antimony oxide is copolymerized, the reaction temperature is 290°C, and the reaction time is 2 hours. After the reaction is completed, the material is discharged and pelletized to obtain aliphatic polyamide modified copolyester chips.

Embodiment 2

[0044] Esterify terephthalic acid and ethylene glycol with a molar ratio of 1:1.05, the reaction temperature is 270°C, and the reaction time is 6h. Then add diethylene glycol isophthalate-5-sodium sulfonate corresponding to 1.5% molar weight of terephthalic acid and polycondensation catalyst three corresponding to 5wt% nylon 66 and 0.05wt% of terephthalic acid weight Antimony oxide is copolymerized, the reaction temperature is 280°C, and the reaction time is 3 hours. After the reaction is completed, the material is discharged and pelletized to obtain aliphatic polyamide modified copolyester chips.

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Abstract

The invention discloses aliphatic-polyamide-modified copolyester, aliphatic-polyamide-modified copolyester fiber, and preparation methods thereof. Preparation materials of the aliphatic-polyamide-modified copolyester comprise: terephthalic acid, ethylene glycol with an amount of 105-200mol% of the terephthalic acid, diethylene glycol isophthalate-5-alkali metal sulfonate with an amount of 1-10mol% of the terephthalic acid, and aliphatic polyamide with an amount of 1-40wt% of terephthalic acid. According to the aliphatic-polyamide-modified copolyester, flexible aliphatic polyamide chain segments are introduced into polyester macromolecular chains, such that macromolecular chain regularity is broken, and copolyester crystallinity and glass transition temperature are reduced. Aliphatic-polyamide-modified copolyester fiber prepared by using the aliphatic-polyamide-modified copolyester has soft texture. Also, when sulfonate groups are introduced into polyester macromolecular chains, flexible aliphatic polyamide chain segments are introduced, such that the copolyester fiber can be dyed by using cationic dyes under normal temperature and normal pressure.

Description

technical field [0001] The invention relates to the field of polymer fibers, in particular to an aliphatic polyamide modified copolyester, aliphatic polyamide modified copolyester fiber and their preparation methods. Background technique [0002] Polyester fiber has excellent properties such as high strength, high modulus, wear resistance and heat resistance, so it is widely used in clothing, home textiles, industry and other fields. However, due to the compact molecular structure of polyester fibers, high crystallinity and orientation, it is difficult for dyes to enter its amorphous region, and the molecular chain of polyester fibers lacks active groups that can bond with dyes, so it can only be used Disperse dyes are dyed under conditions of high temperature and high pressure or with a carrier, so polyester fibers have the disadvantage of being difficult to obtain bright colors. Diethylene glycol isophthalate-5-sulfonic acid alkali metal salt containing sulfonic acid grou...

Claims

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Application Information

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IPC IPC(8): D01D5/12D01D5/08D01F6/82C08G69/44D01D1/09
Inventor 邱志成金剑李鑫
Owner CHINESE TEXTILE ACAD
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