Preparation method of colored polyurethane urea elastic fiber

A polyurethane urea, elastic fiber technology, applied in the direction of one-component polyurethane rayon, fiber chemical characteristics, one-component polyurea rayon, etc., can solve the problem of low cleaning fastness and poor dispersion of multiple inorganic particles. Good, dyeing and other problems, to achieve the effect of excellent spinnability and cleaning fastness

Active Publication Date: 2022-01-11
TAEKWANG IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the polyurethane urea elastic yarn cannot be dyed uniformly, especially the problem of low washing fastness due to discoloration during washing.
That is, common polyurethane urea is prepared by using elastic yarn and polyester yarn or polyamide yarn, and in the case of dyeing these with disperse dye or acid dye (black), there is dark color and / or Or the problem of poor color fastness
[0004] In order to solve these problems, it is attempted to add inorganic particles to the spinning dope of elastic yarn to improve the dyeability, but the dispersibility of many inorganic particles is not good, therefore, the color of the surface when the dyeing agent is present due to the poor surface roughness Insufficient uniformity
[0005] Korean Patent Publication No. 10-646648 discloses the technology of dyeing with acid dyes and the like after spinning the stock solution of carbon particles and the like. However, due to the unsatisfactory dispersibility of the above-mentioned particles and the like, local agglomeration and dyeing part There are shade differences, so there is a problem of low color fastness and insufficient uniform dyeing

Method used

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  • Preparation method of colored polyurethane urea elastic fiber
  • Preparation method of colored polyurethane urea elastic fiber
  • Preparation method of colored polyurethane urea elastic fiber

Examples

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preparation example Construction

[0020] One embodiment of the present invention is the preparation method of colored polyurethane urea elastic fiber, the above-mentioned colored polyurethane urea elastic fiber contains inorganic particles and organic dyeing agent, the preparation method of the above-mentioned colored polyurethane urea elastic fiber: the step of preparing polyurethane urea polymer; A step of preparing a spinning dope by mixing a slurry composition comprising inorganic particles, an organic dye, and a polyurethane prepolymer having an unreacted terminal isocyanate group in the polyurethaneurea polymer; and a step of spinning using the spinning dope.

[0021] In one embodiment of the present invention, the polyurethane prepolymer may include 2.4 mol % to 3.5 mol % of unreacted terminal isocyanate groups.

[0022] In one embodiment of the present invention, the above-mentioned polyurethane urea polymer is prepared by the following steps: adding polytetramethylene ether glycol (Polytetramethylene e...

Embodiment 1

[0103] 1) Use a quantitative pump to continuously transfer 156.31 g / min of polytetramethylene ether glycol (molecular weight is 1800) and 36.96 g / min of diphenylmethane-4,4'-diisocyanate to a static mixer at 40°C , put into a continuous polymerization tube in the form of a cylindrical tube at 80°C, react for 135 minutes, and adjust the terminal unreacted diisocyanate to 2.64±0.02 mole percent, thereby synthesizing a polyurethane prepolymer as the first polymer.

[0104] Cool the above-mentioned first polymer to 40°C and stabilize it for 24 hours. Before putting it into the second reactor, put it into the high-end mixer continuously with 309.93 g / min of N,N-dimethylacetamide at 3500 rpm Stir vigorously for 20 seconds. The above-mentioned first polymer was completely dissolved, and a polyurethane polymer solution having 38.27 weight percent solids at 40° C. was prepared by cooling.

[0105] 2) Prepared a mixture of 4.984kg of ethylenediamine as a chain extender and 0.919kg of d...

Embodiment 2

[0112] In Example 1, in addition to using 1.5 kg of 3,6-bis(4-chlorophenyl)-2,5-dihydropyrrole[3,4-C]pyrrole-1,4-dione as the red band (3,6-Bis(4-chlorophenyl)-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione) (Pigment Red 254, CAS No.: 84632-65-5) Implement in the same way, except for the blue ribbon. The results are shown in Table 1 below.

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Abstract

The present invention provides a novel preparation method of colored polyurethaneurea elastic fibers. And, the colored polyurethaneurea elastic fiber produced by the above-mentioned production method of the present invention is provided.

Description

technical field [0001] The present invention relates to a method for preparing a novel colored polyurethane urea (Polyurethaneurea) elastic fiber and the colored polyurethane urea elastic fiber prepared therefrom, that is, having excellent spinning characteristics, and at the same time improving the surface of the fiber by significantly improving the dispersibility of inorganic particles Coarseness is significantly reduced, so there is almost no color difference in the stain. Background technique [0002] Polyurethane urea elastic fiber is a polymer obtained by using diamine to extend the chain of isocyanate-terminated prepolymer (Prepolymer) synthesized from high molecular weight polyol (Polyol) and excessive organic diisocyanate (Diisocyanate). It is mainly prepared by dry and melt spinning and woven with polyamide (Polyamide) fiber or polyester (polyester) fiber and natural fiber, so that it can be used as an elastic functional material in tights, socks, pantyhose, swimsu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/94D01F1/10C08G18/10C08G18/48C08G18/66C08G18/76C08G18/32
CPCD01F1/06D01F1/10D01F6/70D01F6/72D10B2401/061
Inventor 权容秀都炫在韩荣均金泰成金海东洪景坤
Owner TAEKWANG IND CO LTD
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