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Polyester amide, preparation method and product fibers thereof

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

Active Publication Date: 2015-09-09
CATHAY R&D CENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, preparation method and product fibers thereof
  • Polyester amide, preparation method and product fibers thereof
  • Polyester amide, preparation method and product fibers thereof

Examples

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preparation example Construction

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

[0040] Preferably, the molar ratio of the nylon salt, glycol, 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 dihydric alcohol may be an aliphatic dihydric alcohol containing 2 to 18 carbon atoms, such as ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, heptanediol, octanediol, etc. Alcohol, Nonanediol, Decanediol, Undecanediol, Dodecanediol, Tridecanediol, Tetradecanediol, Pentadecanediol, Hexadecandiol Alcohol, heptadecandiol, octadecanediol, among them, ethylene glycol, propylene glycol and butanediol are preferred.

[0041] In step (1), two or more diols can be added simultaneously to form poly...

Embodiment 1

[0083] Preparation of polyester amide copolymer

[0084] Add 19.4kg of dimethyl terephthalate, 12.4kg of ethylene glycol and 0.1kg of hexamethylenediamine adipate (commercially available, the same below) into a 200L reactor, raise the temperature to 205°C for reaction, and distill off low 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, vacuumize to 50Pa, continue to heat up to 280°C, and react for 4 hours, when the intrinsic viscosity of the polyester amide in the kettle is 0.78dL / g , Fill the polymerization kettle with 0.4MPa nitrogen gas, draw and granulate. The resulting polyester amide had a melting point of 249°C.

Embodiment 2

[0086] Preparation of polyester amide copolymer

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

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Abstract

The present invention discloses a polyester amide, fibers prepared from the polyester amide and preparation methods of the polyester amide and the fibers, wherein the polyester amide comprises four structure units (I), (II), (III) and (IV). According to the present invention, the amide structure units can be well dispersed in the polyester chain segment so as to achieve the effects of modifying and easy dyeing at the lowest cost; and the dispersity of the amide structure is controlled to make the whole molecular chain structure uniform, such that the spinnability can be effectively improved and the occurrence of phenomena such as fiber breaking and fuzz can be prevented during the spinning process. The formulas (I), (II), (III) and (IV) are defined in the instruction.

Description

technical field [0001] The invention relates to a polyester amide, specifically a polyester amide, fibers prepared from the polyester amide and their preparation methods. 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. 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 output has developed rapidly, among which the output of polyester ranks first in the world, and the production capacity is still developing at a high speed. At present, more and more polyester fibers are used for blending with natural protein fibers such as wool to prepare worsted fabrics. However, natural protein fibers su...

Claims

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Application Information

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IPC IPC(8): C08G69/44D01F6/82
Inventor 郑毅秦兵兵刘驰
Owner CATHAY R&D CENT CO LTD
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