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Modified polyester fibers containing solid base catalyst and preparation method thereof

A technology of solid base catalyst and modified polyester, which is applied in the direction of chemical characteristics of fibers, single-component polyester rayon filament, and rayon manufacturing, etc. It also has large problems such as increasing the free volume of voids, improving natural degradation performance, and achieving high selectivity.

Active Publication Date: 2019-05-07
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Antimony-based catalysts currently on the market such as Sb 2 o 3 The amount added in the polyester synthesis process is relatively large, and metal antimony will cause harm to humans and nature, and the large amount of antimony-based catalysts will also have a greater impact on the environment, which is not conducive to the environmental protection production of polyester

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Modified polyester fibers containing solid base catalyst and preparation method thereof
  • Modified polyester fibers containing solid base catalyst and preparation method thereof
  • Modified polyester fibers containing solid base catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A preparation method of a modified polyester fiber containing a solid alkali catalyst, the steps are as follows:

[0070] (1) prepare modified polyester;

[0071] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:

[0072] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1:1:1.2:2.0, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;

[0073] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0074] (1.2) Preparation of doped modified Sb...

Embodiment 2

[0096] A preparation method of a modified polyester fiber containing a solid alkali catalyst, the steps are as follows:

[0097] (1) prepare modified polyester;

[0098] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:

[0099] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.1:1:1.2:2.3, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;

[0100] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 45°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0101] (1.2) Preparation of doped modified ...

Embodiment 3

[0118] A preparation method of a modified polyester fiber containing a solid alkali catalyst, the steps are as follows:

[0119] (1) prepare modified polyester;

[0120] (1.1) The synthesis steps of 2,5,6,6-tetramethyl-2,5-heptanediol are as follows:

[0121] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.2:1:1.25:2.0, and place in an ice bath Under the conditions of reaction for 3 hours, after the reaction is completed, cooling and crystallization, centrifugation, washing, refining and drying are carried out to obtain octyne diol;

[0122] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 3:10:0.03, react at 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0123] (1.2) Preparation of doped mo...

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Abstract

The invention relates to modified polyester fibers containing a solid base catalyst and a preparation method thereof. The preparation method includes the steps that according to a POY technology, after modified polyester melts are prepared into modified polyester POY filaments, and then according to a DTY technology, the modified polyester POY filaments are processed and prepared into the modifiedpolyester fibers containing the solid base catalyst; a modified polyester molecular chain comprises a terephthalic acid chain segment, an ethylene glycol chain segment and 2,5,6,6-tetramethyl-2,5-heptanediol chain segment, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in the specification, and solid base catalyst powder which is roasted at high temperature and doped and modified Sb2O3 powder are dispersed in modified polyesters. After the prepared product is put for 60 months under the conditions that the temperature is 25 DEG C and relative humidity is 65%, the intrinsic viscosity is decreased by 18-24%. The preparation method is low in cost and simple in technology; the prepared product is high in natural degrading rate and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of modified fibers, and relates to a modified polyester fiber containing a solid alkali catalyst and a preparation method thereof. Background technique [0002] Polyester (PET) has been widely used in many industries since it was invented in the early 1940s due to its low cost, good tensile strength, good chemical stability, good transparency, easy processing and good thermal stability. field. It is mainly used in textiles at present, and 60% of its global production is used in textiles. Because of its transparency similar to glass, it is increasingly becoming the main material for food packaging, especially for carbonated beverages. In addition, PET is also used in the manufacture of daily necessities, automotive products, lighting products and sporting goods. [0003] With the rapid development of the PET industry, although PET will not directly cause harm to the environment, PET waste has become a glob...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/183C08G63/86C08G63/83
Inventor 张元华尹立新汤方明
Owner JIANGSU HENGLI CHEM FIBER
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