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Polyurethane urea elastic yarn having improved dyeability and manufacturing method therefor

A polyurethane urea and elastic yarn technology, applied in the direction of single-component polyurethane rayon, rayon manufacturing, spinning solution preparation, etc., can solve the problem of reducing softness and elasticity, difficult to control nitrogen atomic weight, and fully enhance the colorability of polyurethane There are problems such as limitations to achieve the effect of enhancing colorability

Pending Publication Date: 2020-06-26
HYOSUNG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, gelation tends to occur in the reactions in the above-mentioned methods 1) and 2), and method 3) has a problem that it is difficult to control the amount of nitrogen atoms introduced
In addition, the method 4) using a low-molecular-weight diamine as a chain extender can enhance colorability, but has the problem of reducing softness and elasticity
[0008] Besides, Korean Patent Application Publication Nos. 10-2009-0118997 A and 10-2005-0070652 A respectively attempt to improve the colorability by dyeing with a specific blue acid dye or by adding a talc compound, the blue Acid dyes comprise polymers having a maleimide structure formed from maleimide units, however, there is a limit to sufficiently enhancing the colorability of polyurethane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In 33.8 kg of polytetramethylene ether glycol (PTMG, molecular weight 1800), 5.0 mol% of polyethylene glycol (molecular weight 2000) was mixed, and 8.8 kg of 4,4'-diphenylmethane diol was added thereto. After the isocyanate, the resultant was reacted under stirring at 90° C. for 120 minutes in a nitrogen stream to prepare a polyurethane prepolymer having isocyanate at both terminals. The prepolymer was cooled to room temperature, and 66.1 kg of dimethylacetamide was added thereto as a solvent to obtain a polyurethane prepolymer solution.

[0042] Subsequently, 1.1 kg of ethylenediamine (as a chain extender) and 0.1 kg of diethylamine (as a chain terminator) were dissolved in 15.6 kg of dimethylacetamide, and the resultant was added to the In the prepolymer solution, to obtain polyurethane urea solution, the number of amine ends of polyurethane urea solution solid in the solution is 63meq / kg.

[0043] In addition, 1.5% by weight of triethylene glycol-bis-3-(3-tert-butyl...

Embodiment 2

[0046] In the process of preparing the prepolymer of Example 1, 10.0 mol% of polyethylene glycol (molecular weight 2000) was mixed into 32.0 kg of polytetramethylene ether glycol (PTMG, molecular weight 1800), and After adding 8.7 kg of 4,4'-diphenylmethane diisocyanate thereto, the resultant was reacted with stirring for 120 minutes at 90° C. in a nitrogen stream to prepare a polyurethane preform having isocyanate at both ends. Polymer. The subsequent preparation process is the same as in Example 1.

Embodiment 3

[0048] In the process of preparing the prepolymer of Example 1, 20.0 mol% of polyethylene glycol (molecular weight 2000) was mixed into 28.2 kg of polytetramethylene ether glycol (PTMG, molecular weight 1800), and After adding 8.7 kg of 4,4'-diphenylmethane diisocyanate thereto, the resultant was reacted with stirring for 120 minutes at 90° C. in a nitrogen stream to prepare a polyurethane preform having isocyanate at both ends. Polymer. The subsequent preparation process is the same as in Example 1.

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PUM

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Abstract

The present invention relates to a polyurethane urea elastic yarn having improved dyeability and a manufacturing method therefor. Through a process of forming a prepolymer by mixing polyethyleneglycolwith polyol and then adding diisocyanate to the same in a prepolymer manufacturing step during the manufacture of a polyurethane urea elastic yarn, the hydrophilicity of the polyurethane urea elasticyarn is improved such that the accessibility of an acid dye is enhanced, thereby enabling the dyeability of the polyurethane urea elastic yarn to be enhanced and an advantage of dye color deepening of a fabric, in which nylon and a polyurethane urea elastic yarn are knitted together, to be expected.

Description

technical field [0001] The present disclosure relates to a polyurethane urea elastic yarn having improved colorability and a method for producing the same, in particular, to a polyurethaneurea elastic yarn having improved colorability for acid dyes and a method for producing the same. Background technique [0002] Elastic polyurethane fibers are widely used in the textile industry. "Spandex" fibers are used as a general term for such elastic fibers, and generally refer to synthetic fibers having 85% or more of polyurethane bonds in the structure constituting the fibers. [0003] Such polyurethane fibers are generally prepared by primary polymerization in which a polyol (such as a high-molecular-weight diol compound) is reacted with an excess of a diisocyanate compound to obtain a prepolymer having isocyanate groups at both ends of the polyol ( prepolymer); and dissolving the prepolymer in a suitable solvent, and then adding a diamine or diol chain extender to the solution f...

Claims

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Application Information

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IPC IPC(8): D01F6/70D01F1/10D01D5/04D04B1/18
CPCD01D5/04D01F1/10D01F6/70D04B1/18D10B2401/14C08G18/12C08G18/4808D01F1/06D01D1/02D01F1/04D10B2331/10D10B2331/12C08G18/4854C08G18/4833C08G18/7671C08G18/3228C08G18/2865D10B2401/061
Inventor 金泰宪丁昊荣姜渊秀
Owner HYOSUNG CORP
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