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A kind of cationic dyeable polyester fiber and its preparation method

A polyester fiber and cationic technology, which is applied in the field of polyester fiber, can solve the problems of long natural degradation time and limit the application of chemical degradation and recycling, and achieve the effect of increasing free volume, increasing the concentration of oxygen atoms, and increasing the degradation rate

Active Publication Date: 2020-07-03
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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  • A kind of cationic dyeable polyester fiber and its preparation method
  • A kind of cationic dyeable polyester fiber and its preparation method
  • A kind of cationic dyeable polyester fiber and its preparation method

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 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 1.3:2.2, and cool to 1°C ;

[0077] (c) After adding 3-methyl-3-hydroxybutyne and 2,2-dimethylpropanal into the system of (b), react at 25°C for 3 hours, then conduct cooling crystallization and centrifugation And dry to obtain octyne diol, when t...

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 is as follows: preparing cationic modified polyester FDY silk, that is, cationic dyeable polyester fiber, from a cationic modified polyester melt according to the FDY process; The molecular chain of polyester includes terephthalic acid chain segment, ethylene glycol chain segment, sodium sulfonate isophthalic acid chain segment and diol chain segment with tert-butyl side group, diol chain segment with tert-butyl side group The structural formula of the polyhydric alcohol is as follows: solid heteropolyacid powder that has been calcined at high temperature is dispersed in the cation-modified polyester. The dye uptake rate of the prepared product is 87.8-92.2% at a temperature of 120°C, and the K / S value is 23.27-25.67; after being placed for 60 months at a temperature of 25°C and a relative humidity of 65%, its Intrinsic viscosity decreased by 13-17%. In the preparation method of the invention, the addition amount of the third monomer is small, the cost is low, and the process is simple; the obtained product has excellent dyeing performance and natural degradation performance.

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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Patent Type & Authority Patents(China)
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