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Cationic-dyeable polyester fiber and preparation method thereof

A technology of polyester fiber and cation, applied in the field of polyester fiber, can solve the problems of long natural degradation time, limit the application of chemical degradation and recycling, etc., achieve the effect of increasing free volume, increasing the concentration of oxygen atoms, and facilitating penetration

Active Publication Date: 2019-04-26
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the compact structure and high crystallinity of PET, the natural degradation time is very long (the degradation cycle of conventional polyester fibers can reach 16-48 years), which greatly limits the application of chemical degradation and recycling in the field of PET waste treatment.

Method used

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  • Cationic-dyeable polyester fiber and preparation method thereof
  • Cationic-dyeable polyester fiber and preparation method thereof
  • Cationic-dyeable polyester fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A kind of preparation method of cationic dyeable polyester fiber, the steps are as follows:

[0073] (1) prepare cationic modified polyester;

[0074] (1.1) Preparation of 2,6,6-trimethyl-2,5 heptanediol;

[0075] (a) Mix potassium hydroxide aqueous solution and isobutanol at a ratio of 5:1 in a molar ratio of isobutanol to potassium hydroxide, and react for 4 hours at a temperature of 100° C. to obtain potassium isobutoxide. During the reaction, With stirring, the mass concentration of potassium hydroxide aqueous solution is 43%;

[0076] (b) After removing the impurities in the system of (a) and lowering to normal temperature, add xylene to the system of (a) according to the molar ratio of potassium isobutoxide to xylene of 1.3:2.2, and cool to 1°C ;

[0077] (c) After adding 3-methyl-3-hydroxybutyne and 2,2-dimethylpropanal into the system of (b), react at a temperature of 25°C for 3 hours, then carry out cooling crystallization and centrifugation And dry to obta...

Embodiment 2

[0097] A kind of preparation method of cationic dyeable polyester fiber, the steps are as follows:

[0098] (1) prepare cationic modified polyester;

[0099] (1.1) Preparation of 2,6,6-trimethyl-2,5 heptanediol;

[0100] (a) Mix potassium hydroxide aqueous solution and isobutanol at a ratio of 5.5:1 in a molar ratio of isobutanol to potassium hydroxide, and react for 5 hours at a temperature of 100° C. to prepare potassium isobutoxide. During the reaction, With stirring, the mass concentration of potassium hydroxide aqueous solution is 40%;

[0101] (b) After removing impurities in the system of (a) and lowering to normal temperature, add xylene to the system of (a) according to the molar ratio of potassium isobutoxide and xylene of 1.3:2.0, and cool to 3°C ;

[0102] (c) After adding 3-methyl-3-hydroxybutyne and 2,2-dimethylpropanal into the system of (b), react at a temperature of 30°C for 3 hours, then carry out cooling crystallization and centrifugation And dry to obta...

Embodiment 3

[0116] A kind of preparation method of cationic dyeable polyester fiber, the steps are as follows:

[0117] (1) prepare cationic modified polyester;

[0118] (1.1) Preparation of 2,6,6-trimethyl-5-ethyl-2,5-heptanediol;

[0119] (a) Mix potassium hydroxide aqueous solution and isobutanol according to the ratio of isobutanol to potassium hydroxide molar ratio of 5:1, and react at a temperature of 105°C for 4.5h to obtain potassium isobutoxide. During the reaction Accompanied by stirring, the mass concentration of potassium hydroxide aqueous solution is 48%;

[0120] (b) After removing impurities in the system of (a) and lowering to normal temperature, add xylene to the system of (a) according to the molar ratio of potassium isobutoxide to xylene of 1.5:2.5, and cool to 0°C ;

[0121] (c) After adding 3-methyl-3-hydroxybutyne and 2,2-dimethyl-3-pentanone into the system of (b), react at 30°C for 3 hours, and then carry out cooling crystallization , centrifugal separation and...

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Abstract

The invention relates to a cationic-dyeable polyester fiber and a preparation method thereof. The preparation method comprises the following steps: preparing cationic modified polyester FDY filamentsfrom cationic modified polyester melt according to an FDY process, thereby obtaining the cationic-dyeable polyester fiber. The molecular chains of the cationic modified polyester comprise terephthalicacid segments, ethylene glycol segments, sodium m-phthalate sulfonate segments and dihydric alcohol segments with tert-butyl side groups; the structural formula of the dihydric alcohol with tert-butyl side groups is as shown in the specification; and solid heteropoly acid powder subjected to high-temperature roasting is dispersed in the cationic modified polyester. The prepared product has dye-uptake of 87.8-92.2% under the temperature condition of 120 DEG C and the K / S value of 23.27-25.67; and after the product is placed under the conditions that the temperature is 25 DEG C and the relativehumidity is 65% for 60 months, the intrinsic viscosity is reduced by 13-17%. According to the preparation method disclosed by the invention, the addition amount of the third monomer is small, the cost is low, and the process is simple; and the prepared product is excellent in dyeing property and national degradation property.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to a cationic dyeable polyester fiber and a preparation method thereof. Background technique [0002] Polyester is the trade name of polyester fiber in my country, and it is an important variety in synthetic fibers. It is made from terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (EG) through esterification Or the fiber-forming high polymer prepared by transesterification and polycondensation reaction - polyethylene terephthalate (PET), and then the fiber made by spinning and post-processing. With the continuous improvement of human living standards, the fields of clothing and decoration have put forward higher requirements for the quality of fibers. In order to meet people's ever-increasing needs, it is urgent to develop differentiated products with high added value. [0003] Since polyester is a hydrophobic fiber, its molecules do not contain hyd...

Claims

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Application Information

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IPC IPC(8): D01F6/84C08G63/688
CPCD01F6/84C08G63/6886C08G63/183C08K3/22D01D5/088C08L67/02D10B2401/14
Inventor 王丽丽王小雨汤方明
Owner JIANGSU HENGLI CHEM FIBER
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