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Polyester amide, its preparation method and its product fiber

A polyester amide and fiber technology, applied in the field of polyester amide, can solve problems such as difficult control of molecular weight distribution and influence on spinning, and achieve the effects of improving spinnability, low equipment requirements, and improved dyeability

Active Publication Date: 2022-06-28
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

Method used

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  • Polyester amide, its preparation method and its product fiber
  • Polyester amide, its preparation method and its product fiber
  • Polyester amide, its preparation method and its product fiber

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preparation example Construction

[0039] The preparation method of the polyester amide of the present invention comprises the polycondensation of raw material diol, terephthalic acid or its derivative and nylon salt to obtain the polyester amide random copolymer.

[0040] Preferably, the molar ratio of the nylon salt, diol, terephthalic acid and its derivatives is (0.002-99):(1-3):1, preferably (0.005-3):(1.2-2.6 ):1, more preferably (0.01-0.3):(1.5-2.2):1. In the present invention, the diol may be an aliphatic diol containing 2 to 18 carbon atoms, such as ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, heptanediol, octanediol Alcohol, Nonanediol, Decanediol, Undecanediol, Dodecanediol, Tridecanediol, Tetradecanediol, Pentadecanediol, Hexadecandiol Alcohol, heptadecanediol, and octadecanediol, among them, ethylene glycol, propylene glycol, and butanediol are preferred.

[0041] In step (1), two or more dihydric alcohols can be added simultaneously to form polyester amides with differe...

Embodiment 1

[0083] Preparation of polyester amide copolymer

[0084] 19.4kg of dimethyl terephthalate, 12.4kg of ethylene glycol and 0.1kg of hexamethylene adipate (commercially available, the same below) were added to the 200L reactor, heated to 205°C to react, and fractionated low For the boiling point components, the reaction was carried out for 80 minutes, and when the fraction reached 98% of the theoretical amount, the esterification and acylation reactions were terminated. Then add 13g of tetrabutyl titanate polycondensation catalyst, heat up to 250°C, evacuate to 50Pa, continue to heat up to 280°C, and the reaction is carried out for 4 hours. When the intrinsic viscosity of the polyester amide in the kettle is 0.78dL / g , into the polymerization kettle filled with 0.4MPa nitrogen, wire drawing and granulation. The resulting polyesteramide had a melting point of 249°C.

Embodiment 2

[0086] Preparation of polyester amide copolymer

[0087] 18.8kg of dimethyl terephthalate, 11.2kg of ethylene glycol and 0.7kg of adipate pentamethylenediamine salt (commercially available, the same below), 3.8g of tetrabutyl titanate were added to the 200L reactor, and the temperature was raised to 198 The reaction is carried out at ℃, and the low boiling point components are fractionated. The reaction is carried out for 80 minutes. When the fraction reaches 99% of the theoretical amount, the esterification and acylation reactions are terminated. Then add 10g of tetrabutyl titanate polycondensation catalyst, heat up to 240°C, evacuate to 50Pa, continue to heat up to 270°C, and the reaction is carried out for 4 hours. When the intrinsic viscosity of the polyester amide in the kettle is 0.84dL / g , charge 0.5MPa nitrogen into the polymerization kettle, and draw and granulate. The resulting polyesteramide had a melting point of 237°C.

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Abstract

The invention discloses a polyester amide, fibers prepared from the polyester amide and a preparation method thereof. The polyester amide includes four structural units (I), (II), (III) and (IV). In the present invention, the amide structural unit can be better dispersed on the polyester chain segment, and the effect of modification and easy dyeing can be achieved at the lowest cost. 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 present invention relates to a polyester amide, in particular to a polyester amide, a fiber prepared from the polyester amide and a preparation method thereof. Background technique [0002] Polyester fiber has been widely used due to its good performance, but due to its lack of hydrophilic groups, it has poor affinity with rubber in industrial yarn, and needs to be dipped for multiple times. Dyeing at high temperature and high pressure will cause serious environmental pollution due to the low solubility of disperse dyes and the need to add azo co-catalysts. In recent years, my country's chemical fiber production has developed rapidly, among which polyester production ranks first in the world, and production capacity is still developing rapidly. At present, polyester fibers are increasingly used for blending with natural protein fibers such as wool to prepare worsted fabrics. However, natural protein fibers such as wool and silk are dyed with acid...

Claims

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Application Information

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