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Aromatic diamine and method for manufacturing the same, and aramid fiber and method for manufacturing the same

A technology of aramid and aromatic diamine, applied in the direction of single-component polyamide rayon, fiber treatment, fiber chemical characteristics, etc., can solve the discoloration of aramid fiber performance and aramid fiber discoloration Performance, non-uniform molecular weight and other problems, to achieve the effect of improving discoloration resistance and performance

Inactive Publication Date: 2012-09-26
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since prior art aromatic diamines have disadvantages of low purity and high reactivity (may easily deteriorate due to exposure to oxygen), aromatic polyamides prepared using prior art aromatic diamines are polymerized have low and non-uniform molecular weight
Therefore, aramid fibers produced using the prior art aromatic diamines have problems of discoloration and deterioration of properties
[0005] In addition, if the prior art aramid fiber is exposed to the external environment of sunlight, atmosphere and moisture for a long time, the performance of the prior art aramid fiber deteriorates due to discoloration

Method used

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  • Aromatic diamine and method for manufacturing the same, and aramid fiber and method for manufacturing the same
  • Aromatic diamine and method for manufacturing the same, and aramid fiber and method for manufacturing the same
  • Aromatic diamine and method for manufacturing the same, and aramid fiber and method for manufacturing the same

Examples

Experimental program
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Effect test

Embodiment 1

[0079] The organic solvent toluene as a refining additive is added to p-phenylenediamine with a purity of 98%, and the content of the organic solvent is 10 times the impurity content in p-phenylenediamine. Then, the mixture of organic solvent and p-phenylenediamine is thermally distilled in a distillation tower to obtain refined p-phenylenediamine.

Embodiment 2～4

[0081] Except for the content of the added organic solvent, that is, the content of the added toluene is 1 time, 100 times, and 1000 times the impurity content, p-phenylenediamine was prepared in the same manner as in Example 1 above.

Embodiment 5

[0102] The mixture is prepared by adding the organic solvent toluene to the aromatic diamine p-phenylenediamine, and then adding the antioxidant hydrazine to it, wherein the concentration of toluene is 50% by weight of p-phenylenediamine, and the concentration of hydrazine is p-phenylene 5% by weight of diamine. Then, the above-mentioned mixture is thermally distilled in a distillation tower to obtain refined p-phenylenediamine.

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Abstract

Disclosed is aromatic diamine with high purity obtained by efficiently removing impurities and preventing oxidation, and a method for manufacturing the same; and aramid fiber with improved discoloration resistance realized by preventing deterioration in quality even for a long-period exposure to the external environments of sunlight, atmosphere, and moisture, and a method for manufacturing the same.

Description

Technical field [0001] The present invention relates to an aromatic diamine and a preparation method thereof, and an aromatic polyamide fiber and a preparation method thereof, and more specifically, to an aromatic diamine with improved performance and discoloration resistance and a preparation method thereof, and the use of Aramid fibers of aromatic diamines with improved mechanical properties and discoloration resistance and preparation methods thereof. Background technique [0002] Generally speaking, fully aromatic polyamide fibers, usually called aramid fibers, can be divided into para-aramid fibers and meta-aramid fibers. Among them, para-aramid fibers are made of benzene. The ring is formed by a structure in which the amide group (CONH) is linearly connected. At this time, the para-aramid fiber with a diameter of 5 mm has such a strength that it can lift and maintain a two-ton automobile. Therefore, para-aramid fibers are used in various fields of advanced technology in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/50C07C209/90D01F6/60D06M13/282D06M13/325
CPCC07C211/51D01F6/605D01F1/10C07C209/84
Inventor 李孝珍韩仁植
Owner KOLON IND INC