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Method for preparing polyurethaneurea elastic fiber with improved heat settability and polyurethaneurea elastic fiber prepared by the same

An elastic fiber, polyurethane urea technology, applied in the field of polyurethane urea elastic fiber, can solve the problems of unfavorable spinning, low yarn uniformity, modulus and elastic recovery deterioration, etc., to improve hand feel, high and low temperature heat setting efficiency, improve The effect of yarn uniformity

Inactive Publication Date: 2010-09-29
HYOSUNG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the modulus and elastic recovery of this polyurethane urea fiber are significantly deteriorated, and the yarn uniformity is low, the fiber is not conducive to spinning

Method used

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  • Method for preparing polyurethaneurea elastic fiber with improved heat settability and polyurethaneurea elastic fiber prepared by the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In a nitrogen flow atmosphere, 32g of 2,4'-diphenylmethane diisocyanate, 427g of 4,4'-diphenylmethane diisocyanate and 2000g of polytetramethylene ether glycol (molecular weight=1800) in Stirring and reacting at 90° C. for 180 minutes, thereby preparing a polyurethane urea prepolymer having isocyanate groups at both ends. The prepolymer was cooled to room temperature, and 3614 g of dimethylacetamide was added to prepare a polyurethaneurea prepolymer solution. Subsequently, 33.6 g (0.56 mol) of ethylenediamine, 10.4 g (0.14 mol) of 1,2-diaminopropane and 5.14 g of diethylamine were dissolved in 656 g of dimethylacetamide, and heated at 10°C or lower It is added to the prepolymer solution at low temperature to obtain a polyurethaneurea solution.

[0044] Based on the solids content of the resulting polymer, 1.5% by weight of ethylenebis(oxyethylene)bis-(3-(5-tert-butyl-4-hydroxy-m-tolyl)-propionate), 0.5% by weight of 5,7-di-tert-butyl-3-(3,4-dimethylphenyl)-3H-benzofur...

Embodiment 2

[0047] In a nitrogen flow atmosphere, 46g of 2,4'-diphenylmethane diisocyanate, 413g of 4,4'-diphenylmethane diisocyanate and 2000g of polytetramethylene ether glycol (molecular weight=1800) in Stirring and reacting at 90° C. for 180 minutes, thereby preparing a polyurethane urea prepolymer having isocyanate groups at both ends. The prepolymer was cooled to room temperature, and 3614 g of dimethylacetamide was added to prepare a polyurethaneurea prepolymer solution. Subsequently, 33.6 g (0.56 mol) of ethylenediamine, 10.4 g (0.14 mol) of 1,2-diaminopropane and 5.14 g of diethylamine were dissolved in 656 g of dimethylacetamide, and heated at 10°C or lower It is added to the prepolymer solution at low temperature to obtain a polyurethaneurea solution.

[0048] Based on the solids content of the resulting polymer, 1.5% by weight of ethylenebis(oxyethylene)bis-(3-(5-tert-butyl-4-hydroxy-m-tolyl)-propionate), 0.5% by weight of 5,7-di-tert-butyl-3-(3,4-dimethylphenyl)-3H-benzofur...

Embodiment 3 and 4

[0051] Polyurethaneurea elastic fibers were prepared in the same manner as in Example 1 except that the ratio of 2,4'-diphenylmethane diisocyanate to 4,4'-diphenylmethane diisocyanate was changed. The physical properties were evaluated in the same manner, and the results are shown in Table 1.

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Abstract

The present invention relates to a method for preparing polyurethaneurea elastic fiber, the method comprising reacting a mixture of at least one diisocyanate comprising 4,4'-diphenylmethanediisocyanate and 7 to 25 mole % of 2,4'-diphenylmethanediisocyanate with polyol to produce a prepolymer, and polyurethaneurea elastic fiber prepared by the same. The polyurethaneurea elastic fiber of the present invention has superior spinning workability, improved yarn evenness, and high heat-set efficiency even at low temperature.

Description

technical field [0001] The present invention relates to a method for preparing polyurethane urea elastic fibers with improved heat setting efficiency, and polyurethane urea elastic fibers prepared by the method; more specifically, the present invention relates to a method for preparing polyurethane urea elastic fibers with improved heat setting efficiency, And polyurethaneurea elastic fibers produced by the process in which a prepolymer is produced from a mixture consisting of at least one diisocyanate of polyurethaneurea comprising 4,4'-diphenylmethane diisocyanate And 2,4'-diphenylmethane diisocyanate composition. Background technique [0002] In general, polyurethane urea elastic fibers are prepared by the following method. First, a polyol compound having a large molecular weight is reacted with an excess amount of diisocyanate to prepare a prepolymer having isocyanate groups at both terminals of the polyol. Then, the prepolymer is dissolved in a suitable solvent, and a...

Claims

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Application Information

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IPC IPC(8): D01F6/70
CPCC08G18/7671C08G18/4854D01F6/70C08G18/10
Inventor 崔美泳晋中成姜渊秀
Owner HYOSUNG CORP
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