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Polyester amide and its preparation method and fiber made from the polyester amide

A technology of polyester amide and diamine, which is applied in the fields of fiber chemical characteristics, single-component synthetic polymer rayon, textiles and papermaking, etc. It can solve the problems of shortening the replacement cycle of spinning components, difficult control of molecular weight distribution, and fiber dryness. Unevenness and other problems, to achieve the effect of optimizing polyester performance, improving spinnability, and reducing amide bonds

Active Publication Date: 2021-11-16
CATHAY R&D CENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw material diamide diol of this patent is not a common chemical raw material and needs to be prepared in advance. At the same time, this method has the common problem of chain extension reaction, that is, the molecular weight distribution is not easy to control, which will have a certain impact on spinning
[0009] Previously, although the patent CN104892934A we applied for solved the above problems, in the process of in-depth research, we found that some polyester amides would have gel problems, resulting in uneven fiber evenness and significantly shortened spinning component replacement cycle

Method used

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  • Polyester amide and its preparation method and fiber made from the polyester amide
  • Polyester amide and its preparation method and fiber made from the polyester amide
  • Polyester amide and its preparation method and fiber made from the polyester amide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] Embodiment 1 prepares polyester amide copolymer

[0103] Add 81.5kg of terephthalic acid, 0.9kg of pentamethylenediamine, 37.4kg of ethylene glycol, 39g of ethylene glycol antimony and 24.3g of trimethyl phosphate into a 300L esterification reactor preheated at 100°C, and stir After 10 minutes, replace with nitrogen and fill with nitrogen to 2atm, gradually raise the temperature to 250°C, keep the temperature difference between the jacket temperature and the material temperature less than 80°C, keep the temperature at the top of the condensation tower below 170°C, and use the fractionating tower to fractionate low boiling point components. First maintain the pressure at 0.3 atm, and then gradually drop to normal pressure. When the fraction reaches 92% of the theoretical amount, the esterification and acylation reactions are completed, and the reaction is carried out for 265 minutes. Transfer the reaction solution to the polycondensation tank, gradually raise the tempera...

Embodiment 2

[0104] Embodiment 2 prepares polyester amide copolymer

[0105] Add 80kg of terephthalic acid, 38.4kg of ethylene glycol, and 4kg of pentamethylenediamine terephthalate (nylon 5T salt) into a 300L esterification reactor preheated at 100°C, stir for 10 minutes, and replace with nitrogen Inflate nitrogen to 2atm, gradually raise the temperature to 260°C, keep the temperature difference between the jacket temperature and the material temperature less than 80°C, keep the temperature at the top of the condensation tower below 170°C, use the fractionating tower to fractionate the low boiling point components, and keep it at 0.3atm during the period pressure, then gradually lowered to normal pressure, and when the fraction reached 96% of the theoretical amount, the esterification and acylation reactions were completed, and the reaction was carried out for 290 minutes. Add 39g of ethylene glycol antimony and 24.3g of trimethyl phosphate to the system, stir evenly, then transfer the re...

Embodiment 3

[0106] Embodiment 3 prepares polyester amide copolymer

[0107] Add 93.5kg dimethyl terephthalate, 37.4kg ethylene glycol, 8kg pentamethylenediamine terephthalate (nylon 5T salt), and 19g tetrabutyl titanate to the 300L esterification reaction preheated at 100°C In the kettle, after stirring for 10 minutes, replace with nitrogen and fill with nitrogen to 2atm, gradually raise the temperature to 250°C, keep the temperature difference between the jacket temperature and the material temperature less than 80°C, keep the temperature at the top of the condensing tower below 170°C, use the fractionating tower to fractionate the low boiling point Components, during which the pressure was first maintained at 0.3 atm, and then gradually dropped to normal pressure. When the fraction reached 92% of the theoretical amount, the transesterification and acylation reactions were completed, and the reaction was carried out for 265 minutes. Add 24g of tetrabutyl titanate polycondensation catalys...

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Abstract

The invention discloses a polyester amide, a preparation method thereof and a fiber prepared from the polyester amide. The polyester amide is composed of a plurality of following structural units in which m is a different value, wherein m is an integer ≥ 1 , x is an integer from 2 to 18, y is an integer from 2 to 18, R 1 ~R 4 each independently selected from H or C 1 ~C 4 alkyl. The polyester amide of the present invention can effectively reduce the compactness of the molecular structure of polyester fibers, can realize polyester performance optimization with fewer amide bonds and lower costs, and solve the problem of some polyester amide containing gel and spinning process Problems such as high unevenness of fiber evenness and short replacement cycle of spinning components. In addition, due to the control of the dispersion of the amide structure, the entire molecular chain structure is uniform, which can effectively improve the spinnability during the spinning process and prevent the occurrence of broken filaments and wool filaments.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular, the invention relates to a polyester amide, a preparation method thereof and a fiber prepared from the polyester amide. Background technique [0002] Polyester fiber has been widely used due to its good performance. However, due to its lack of hydrophilic groups, it has poor affinity with rubber in industrial yarns and needs to be dipped multiple times. In civil yarns, dispersion must be used. Dyes are dyed at high temperature and high pressure. Due to the low solubility of disperse dyes and the addition of azo catalysts, polyester fibers are increasingly used for blending with wool and other natural protein fibers to prepare worsted fabrics. However, natural protein fibers such as wool and real silk are dyed with acid dyes with low price, complete color spectrum and bright color. If ordinary polyester fiber is blended with wool, silk, etc., it cannot be dyed in the same...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/44D01F6/82
CPCC08G69/44D01F6/82
Inventor 郑毅秦兵兵刘修才
Owner CATHAY R&D CENT CO LTD
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