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Heptanediol modified polyester fiber with tert-butyl side group and preparation method thereof

A modified polyester with tert-butyl technology, which is applied in the field of polyester fiber, can solve problems such as inability to catalyze, reduce brightness, and damage, and achieve the effects of improving catalytic activity, reducing the amount of addition, and increasing the specific surface area

Active Publication Date: 2020-10-16
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal antimony is harmful to the body and will bring harm to both people and nature. At present, the environmental protection problems of PET material bottle-grade chips containing antimony and other metals have attracted widespread attention. However, compared with other catalysts, antimony trioxide, etc. Antimony-based catalysts have the advantages of intermediate activity, low price, and low promotion of side reactions. Therefore, at present, antimony-based catalysts are still widely used in the market, and their market use ratio reaches 90%. Antimony-based catalysts are still difficult to be comprehensively used by other catalysts. replace
At this stage, common antimony-based catalysts on the market such as Sb 2 o 3 The amount added in the polyester synthesis process is large, and the large amount of antimony-based catalysts has a greater impact on the environment, which is not conducive to the environmental protection production of polyester. At the same time, the antimony-based catalysts will be converted into antimony in the polycondensation reaction. , so that the gray color and brightness of polyester are reduced, the greater the amount of antimony-based catalyst added, the greater the impact on the color and quality of polyester, but the antimony-based catalyst added in a small amount cannot react to all the raw materials involved in polyester synthesis. Catalysis, unable to meet the needs of polyester production

Method used

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  • Heptanediol modified polyester fiber with tert-butyl side group and preparation method thereof
  • Heptanediol modified polyester fiber with tert-butyl side group and preparation method thereof
  • Heptanediol modified polyester fiber with tert-butyl side group and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A kind of preparation method of 2,6,6-trimethyl-2,5 heptanediol modified polyester fiber, concrete steps are as follows:

[0073] (1) prepare modified polyester;

[0074] (1.1) Preparation of doped modified Sb 2 o 3 ;

[0075] (1.1.1) Mg(NO 3 ) 2 aqueous solution with a concentration of 8 mol% Sb 2 o 3 The solution is mixed evenly, Sb 2 o 3 The solvent of the solution is oxalic acid, the Mg in the mixture 2+ with Sb 3+ The molar ratio is 2:100;

[0076] (1.1.2) Add dropwise ammonia water with a concentration of 2 mol / L until the pH of the mixed solution is 9 to obtain a precipitated product, then wash and dry the precipitated product at a temperature of 105°C for 2.5 hours;

[0077] (1.1.3) The dried product is firstly heated to 400°C and then kept for 2.5 hours, then heated to 900°C and kept for 1.5h, and finally cooled in air and pulverized to obtain a doped modified product with an average particle size of 0.4 microns. Sb 2 o 3 Powder;

[0078] (1.2) P...

Embodiment 2

[0096] A kind of preparation method of 2,6,6-trimethyl-2,5 heptanediol modified polyester fiber, concrete steps are as follows:

[0097] (1) prepare modified polyester;

[0098] (1.1) Preparation of doped modified Sb 2 o 3 ;

[0099] (1.1.1) Ca(NO 3 ) 2 Aqueous solution with a concentration of 5 mol% Sb 2 o 3 The solution is mixed evenly, Sb 2 o 3 The solvent of the solution is oxalic acid, the Ca in the mixture 2+ with Sb 3+ The molar ratio is 1:100;

[0100] (1.1.2) Add dropwise ammonia water with a concentration of 2 mol / L until the pH value of the mixed solution is 10 to obtain a precipitated product, and then wash and dry the precipitated product at a temperature of 110° C. for 2 hours;

[0101] (1.1.3) The dried product was first heated to 400°C and then kept for 2 hours, then heated to 900°C and kept for 1 hour, and finally cooled in air and pulverized to obtain doped modified Sb with an average particle size of 0.4 microns 2 o 3 Powder;

[0102] (1.2) Pre...

Embodiment 3

[0114] A preparation method of 2,6,6-trimethyl-5-ethyl-2,5-heptanediol modified polyester fiber, the specific steps are as follows:

[0115] (1) prepare modified polyester;

[0116] (1.1) Preparation of doped modified Sb 2 o 3 ;

[0117] (1.1.1) Ba(NO 3 ) 2 Aqueous solution with a concentration of 10 mol% Sb 2 o 3 The solution is mixed evenly, Sb 2 o 3 The solvent of the solution is oxalic acid, Ba in the mixture 2+ with Sb 3+ The molar ratio is 3:100;

[0118] (1.1.2) Add dropwise ammonia water with a concentration of 2 mol / L until the pH of the mixed solution is 9.5 to obtain a precipitated product, then wash and dry the precipitated product at a temperature of 105°C for 3 hours;

[0119] (1.1.3) The dried product was first heated to 400°C and then kept for 3 hours, then heated to 900°C and kept for 2 hours, and finally cooled in air and pulverized to obtain doped modified Sb with an average particle size of 0.5 microns 2 o 3 Powder;

[0120] (1.2) Preparation of...

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Abstract

The invention relates to a heptandiol modified polyester fiber with a tert-butyl side group and a preparation method of the heptandiol modified polyester fiber. The preparation method comprises the following steps: preparing modified polyester FDY yarns from modified polyester melt according to an FDY process, thereby obtaining the heptandiol modified polyester fiber with the tert-butyl side group. The preparation method of the modified polyester comprises the following steps: uniformly mixing terephthalic acid, ethylene glycol, heptandiol with a tert-butyl side group and doped and modified Sb2O3 powder, and sequentially carrying out an esterification reaction and a polycondensation reaction. The prepared product has the dye-uptake of 85.7-88.6% under the temperature condition of 120 DEG C, and also has the K / S value of 22.35-25.43. The heptandiol modified polyester fiber disclosed by the invention is simple in preparation method and excellent in dyeing property, the addition amount ofan antimony based catalyst during synthesis of the polyester is effectively reduced, and the prepared product is high in dye-uptake and excellent in mechanical property and has excellent applicationprospects.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers, and relates to heptanediol-modified polyester fibers with tert-butyl side groups and a preparation method thereof. Background technique [0002] Polyester fiber has good heat resistance, chemical resistance, mechanical properties and electrical properties, especially good transparency, good insulation, low production cost and high cost performance. PET fiber has excellent physical and mechanical properties due to its regular molecular structure and high crystallinity, but it also brings difficulties in dyeing PET fiber. In order to obtain polyester fibers with more functions and better performance, conventional PET fibers need to be modified. [0003] At present, there are many researches on PET modification at home and abroad. Generally, the processing and use performance of polyester products are changed by changing some chemical properties of polyester, so that the obtained polyester...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/84C08G63/183C08G63/86
Inventor 张关健李文刚王丽丽刘灯胜
Owner JIANGSU HENGLI CHEM FIBER