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Polyurethane-urea elastomeric fiber with low-temperature workability

A technology of polyurethane urea and elastic yarn, which is applied in the manufacture of one-component polyurethane rayon, one-component polyurea rayon, rayon, etc., and can solve the problems of unfavorable spinning operation, decrease of modulus and elastic recovery rate, Problems such as poor uniformity of raw silk can prevent heat embrittlement, improve touch, and prevent curling.

Inactive Publication Date: 2017-08-01
HYOSUNG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the content of 2,4'-diphenylmethane diisocyanate is greatly increased to 23 mol% to 55 mol%, although the heat setting property of polyurethane urea elastic yarn will be improved, the modulus and elastic recovery rate will be greatly reduced. Decrease, the uniformity of the raw yarn is not good, which is not conducive to the spinning operation

Method used

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  • Polyurethane-urea elastomeric fiber with low-temperature workability
  • Polyurethane-urea elastomeric fiber with low-temperature workability

Examples

Experimental program
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Effect test

Embodiment 1

[0060] A first polymer was prepared by mixing polytetramethylene ether glycol with a molecular weight level of 1800 and 4,4'-diphenylmethane diisocyanate at a capping ratio (CR) of 1.61. Ethylenediamine was used as the first chain extender, ethylene glycol was used as the second chain extender, and diethylamine was used as the chain terminator. The ratio of the first chain extender and the second chain extender is set to 7:3, and the total concentration of the mixed solution obtained by mixing the first chain extender, the second chain extender and the chain terminator used is adjusted was 7 mol%, and dimethylacetamide was used as a solvent. That is, in a nitrogen stream, 35.2 g of polytetramethylene ether glycol with a molecular weight of 1800 and 7.8 g of methylene diisocyanate were stirred at 90° C. to react for 180 minutes, thereby preparing polyurethane urea with isocyanate at both ends prepolymer.

[0061] After cooling the above prepolymer to room temperature, 55.3 g ...

Embodiment 2

[0065] Except that 1,3-propylenediamine as the first chain extender and ethylene glycol as the second chain extender were used at a ratio of 7:3, polyurethane urea elastic yarn was produced in the same manner as in Example 1.

Embodiment 3

[0067] Except that the capping ratio (CR) of polytetramethylene ether glycol with a molecular weight level of 1800 and 4,4'-diphenylmethane diisocyanate was changed to 1.7, polyurethane urea elastic was produced in the same way as in Example 2 Silk.

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Abstract

The present invention relates to polyurethane-urea elastomeric fiber with low-temperature workability, and more specifically to polyurethane-urea elastomeric fiber prepared by forming a prepolymer by means of a primary polymerization of polyol and diisocyanate, and then a secondary polymerization of the prepolymer, a first chain extender, and a second chain extender, wherein the first chain extender is one or more types selected from among aromatic, aliphatic and alicyclic amines, and the second chain extender is one or more types selected from among aromatic, aliphatic and low molecular-weight diols. The polyurethane-urea elastomeric fiber according to the present invention has improved fiber uniformity and workability and enhanced heat-set efficiency, thus allowing heat-setting to be carried out at a low temperature to keep thermal embrittlement from occurring to the fiber under treatment, and therefore the touch of the fabric can be improved and the edge-curling of the processed fabric can be prevented.

Description

technical field [0001] The present invention relates to polyurethane urea elastic yarn with low temperature processability. Background technique [0002] Polyurethane urea is generally prepared by primary polymerization reaction of polyol which is a high molecular weight diol compound and excess diisocyanate compound to prepare a prepolymer (prepolymer) having isocyanate groups at both ends of the polyol. After the polymer is dissolved in a suitable solvent, diamines or diols chain extenders, monoalcohols or monoamines and other chain terminators are added to the resulting solution to react to prepare polyurethane urea fiber spinning solution, and then through dry spinning Silk and wet spinning to make polyurethane urea elastic fibers. [0003] The resulting polyurethane urea fiber, because of its intrinsic high elasticity, is widely used in various clothing fields such as body shaping underwear and sportswear after cross-linking and weaving with polyamide fiber, polyester ...

Claims

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Application Information

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IPC IPC(8): D01F6/70D02G3/32
CPCD01F6/70D02G3/32D01D5/04D01F1/10D01F1/106D01F6/72D02G3/02
Inventor 丁昊荣姜渊秀
Owner HYOSUNG CORP
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