Copolymerized aramid dope-dyed yarn and method for preparing same

a technology of copolymerized aramid and dyed yarn, which is applied in the direction of dye addition to spinning solution, monocomponent copolyamides artificial filaments, textiles and paper, etc. it can solve the problems of reducing durability, affecting the color quality of dyed yarn, so as to reduce the solubility of the polymerization solution, the effect of preventing the decrease of the polymerization degree of the copoly

Inactive Publication Date: 2018-07-12
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0015]According to the present invention, due to the addition of the coloring matter to the polymerization solution, it is possible to efficiently prevent a decrease in a polymerization degree of the copolymerized aramid polymer or a reduction in solubility of the polymerization solution.
[0016]Further, according to the present invention, the copolymerized aramid polymer having a cyano group (-CN) and the coloring matter having a cation are bonded through a hydrogen bond in the polymerization process of the polymerization solution containing the copolymerized aramid polymer, and the coloring matter having a cation is bonded with the cyano group (-CN) located on a main chain of the copolymerized aramid polymer through an ionic bond, and can show behavior together with the main chain during formation of a liquid crystal, thereby improving color strength, color fastness to light and color fastness to washing of the copolymerized aramid dope-dyed yarn.
[0017]Hereinafter, the present invention will be described in detail.
[0018]Embodiments of the present invention described below are proposed as illustrative examples to help understanding the present invention but do not particularly limit the subject matters of the present invention to be protected. Further, it will be apparent to those skilled in the art that various alterations and modifications of the present invention are possible within the technical spirit and scope of the present invention. Accordingly, the present invention includes inventions described in the claims and all of the alterations and modification within equivalents thereof.
[0019]First, in the present invention, an inorganic salt is dissolved in an organic solvent, followed by adding aromatic diamine having a cyano group (CN-) thereto.
[0020]Herein, the aromatic diamine having a cyano group (CN-) may include a solution of paraphenylenediamine and cyano-para-phenylenediamine dissolved in a molar ratio of 1:9 to 9:1, or a solution of cyano-para-phenylenediamine alone.

Problems solved by technology

Therefore, a manufacturing process becomes complicated, is harmful for a human body, and may cause a problem such as a decrease in durability due to corrosion of an apparatus.
Moreover, since the sulfuric acid solvent used for dissolving an aramid polymer having high chemical resistance and removed after spinning often causes environmental pollution, it should be appropriately treated after the use.
Costs for treatment of such spent sulfuric acid usually reduce economic advantages of the aramid fiber.
However, the conventional art entails a problem that the prepared copolymerized aramid fiber has deteriorated dyeing property due to high crystalline property although having an advantage of not using the sulfuric acid solvent.
However, this method involves problems of deteriorating solubility and dyeing fastness of the polymerization solution although improving dyeing property of the manufactured copolymerized aramid fiber.
However, this method entails some problems such as a decrease in a polymerization degree of the copolymerized aramid polymer, a reduction in solubility of the polymerization solution, and a deterioration in a color fastness of the manufactured dope-dyed yarn.

Method used

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  • Copolymerized aramid dope-dyed yarn and method for preparing same
  • Copolymerized aramid dope-dyed yarn and method for preparing same
  • Copolymerized aramid dope-dyed yarn and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0048]An N-methyl-2-pyrrolidone (NMP) organic solvent including 3 wt. % CaCl2 was fed to a reactor under a nitrogen atmosphere, then, 100 mol % of cyano-p-phenylenediamine were introduced in the reactor and dissolved to prepare a mixture solution.

[0049]Next, 100 mol % of terephthaloyl dichloride and 1.5 wt. % of C.I. Basic Blue 22 (to the weight of the copolymerized aramid polymer) were added to the reactor including the mixture solution, simultaneously, to prepare a polymerization solution containing the copolymerized aramid polymer.

[0050]Following this, after extruding the polymerization solution through a spinning spinneret, air gap and a coagulating agent were sequentially passing through the spinning spinneret, thereby forming a multi-filament having a linear density of 3,000 denier. A pressure of a spin pack was 2,800 psi and a spinning speed was 600 mpm (meter per minute).

[0051]After then, the multi-filament was washed and the washed multi-filament was dried and drawn by a dr...

example 3

[0053]An N-methyl-2-pyrrolidone (NMP) organic solvent including 3 wt. % CaCl2 was fed to a reactor under a nitrogen atmosphere, then, 50 mol % of p-phenylenediamine and 50 mol % of cyano-p-phenylenediamine were introduced in the reactor and dissolved to prepare a mixture solution.

[0054]Next, 100 mol % of terephthaloyl dichloride and 3 wt. % of C.I. Basic Blue 64 (to the weight of the copolymerized aramid polymer) were added to the reactor including the mixture solution, simultaneously, to prepare a polymerization solution containing the copolymerized aramid polymer.

[0055]Following this, after extruding the polymerization solution through a spinning spinneret, air gap and a coagulating agent were sequentially passing through the spinning spinneret, thereby forming a multi-filament having a linear density of 3,000 denier. A pressure of a spin pack was 2,800 psi and a spinning speed was 600 mpm (meter per minute).

[0056]After then, the multi-filament was washed and the washed multi-fila...

example 4

[0058]An N-methyl-2-pyrrolidone (NMP) organic solvent including 3 wt. % CaCl2 was fed to a reactor under a nitrogen atmosphere, then, 100 mol % of cyano-p-phenylenediamine was introduced in the reactor and dissolved to prepare a mixture solution.

[0059]Next, 100 mol % of terephthaloyl dichloride and 4.9 wt. % of C.I. Basic Red 22 (to the weight of the copolymerized aramid polymer) were added to the reactor including the mixture solution, simultaneously, to prepare a polymerization solution containing the copolymerized aramid polymer.

[0060]Following this, after extruding the polymerization solution through a spinning spinneret, air gap and a coagulating agent were sequentially passing through the spinning spinneret, thereby forming a multi-filament having a linear density of 3,000 denier. A pressure of a spin pack was 2,800 psi and a spinning speed was 600 mpm (meter per minute).

[0061]After then, the multi-filament was washed and the washed multi-filament was dried and drawn by a dry ...

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Abstract

The present invention relates to a copolymerized aramid dope-dyed yarn and a method for preparing the same wherein, when a copolymerized aramid yarn is prepared by adding terephthaloyl dichloride to an organic solvent in which an aromatic diamine having a cyano group is dissolved, reacting the same to polymerize a polymerization solution containing a copolymerized aramid polymer, and then spinning and coagulating the polymerization solution, a copolymerized aramid dope-dyed yarn is manufactured by adding a coloring matter having a cation during the polymerization process of the polymerization solution containing the copolymerized aramid polymer. The present invention can effectively prevent deterioration in a polymerization degree of the copolymerized aramid polymer or deterioration in the dissolubility of the polymerization solution due to the addition of the coloring matter to the polymerization solution. Further, according to the present invention, when a copolymerized aramid polymer having a cyano (-CN) group and a coloring matter having a cation are bonded through a hydrogen bond to form a liquid crystal during the polymerization process of the polymerization solution containing the copolymerized aramid polymer, the behavior together with a main chain of the copolymerized aramid polymer is possible, thereby enhancing the color strength, color fastness to light, and color fastness to washing of the copolymerized aramid dope-dyed yarn.

Description

TECHNICAL FIELD[0001]The present invention relates to a copolymerized aramid dope-dyed yarn and a method for preparing the same, and more particularly, to a method for preparing a copolymerized aramid dope-dyed yarn with excellent color strength and color fastness by mixing a coloring matter having a cation in a polymerization solution when spinning the polymerization solution containing a copolymerized aramid polymer by means of a spinning spinneret without using sulfuric acid.BACKGROUND ART[0002]Aromatic polyamide, commonly referred to as an aramid, includes a para-based aramid having a structure in which benzene rings are linked linearly through an amide group (—CONH) and a meta-based aramid which has a linkage structure different from the para-based aramid.[0003]The para-based aramid has excellent characteristics such as a high strength, high elasticity and low shrinkage. Since the para-based aramid has a high enough strength so as to be able to lift a two-ton vehicle with a thi...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D01F1/04D01F1/06D01F6/80
CPCD01F1/04D01F1/06D01F6/805D10B2401/20D01F6/605
Inventor LEE, BUM HOONCHAE, YU RI
Owner KOLON IND INC
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