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Cationic dyeable polyurethane elastic fiber and preparation method thereof

A polyurethane elastic and cationic technology, applied in fiber chemical characteristics, single-component synthetic polymer rayon, textiles and papermaking, etc., can solve the problems of less research on coloring properties, achieve bright color, reduce energy consumption, and improve quality effect

Active Publication Date: 2017-03-08
华峰重庆氨纶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, most of the current research focuses on improving the colorability of acid dyes and disperse dyes for spandex fibers, while there are fewer studies on improving the colorability of cationic dyes for spandex fibers.

Method used

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  • Cationic dyeable polyurethane elastic fiber and preparation method thereof
  • Cationic dyeable polyurethane elastic fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Combine polytetrahydrofuran ether glycol PTMG (molecular weight 1810) 375.95Kg, small molecule sulfonate-based diol 0.451Kg (sodium dimethyl isophthalate-5-sulfonate and 1,4-butanediol The reactant is equivalent to 1Kg PTMG containing 1200ppm of small molecule sulfonate-based diol) and 87.95Kg of diphenylmethane-4,4'diisocyanate are placed in the reactor and reacted at 86±2℃ for 120min, Obtain an isocyanate group-terminated prepolymer;

[0027] (2) Add 692.8Kg of DMAC to the prepolymer to fully dissolve the prepolymer in DMAC;

[0028] (3) Add to the prepolymer solution an amine mixed solution formed by dissolving 7.841Kg ethylenediamine, 0.509Kg propylenediamine, and 1.522Kg diethylamine in 187.567Kg DMAC to carry out chain extension reaction and chain termination reaction , Get polyurethane urea stock solution;

[0029] (4) Adding matting agent, anti-yellowing agent, ultraviolet absorber, antioxidant and lubricating and relaxing agent to polyurethane urea stock solutio...

Embodiment 2

[0032] The preparation method is the same as in Example 1, the difference is that every 1 Kg of PTMG contains 3500 ppm of small molecule sulfonate-based diol.

Embodiment 3

[0034] The preparation method is the same as that in Example 1, except that every 1 Kg of PTMG contains 7500 ppm of small molecule sulfonate-based diol.

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Abstract

The invention relates to a preparation method of a cationic dyeable polyurethane elastic fiber. The preparation method includes the specific steps of 1), at a prepolymerization reaction stage, preparing an isocyanate-group-terminated prepolymer from diphenyl methane-4,4'-diisocyanate and polytetrahydrofuran glycol, wherein the polytetrahydrofuran glycol contains 1,200-125,000 ppm micromolecular sulfonate-based diol; 2), dissolving the prepolymer prepared in the step 1 by a nonprotic polar solvent so as to obtain a prepolymer solution; 3), adding a chain extender and a chain terminator into the prepolymer solution obtained in the step 2, and conducting polymerization reaction so as to obtain a polyurethaneurea solution; 4), curing a spandex spinning solution prepared in the step 3, and performing a dry spinning method so as to obtain the cationic dyeable polyurethane elastic fiber. The cationic dyeable polyurethane elastic fiber has a cationic dye dyeable function and can be dyed with cationic dyeable blended polyester at an ordinary pressure, so that a 'bare' phenomenon during spandex stretching is prevented.

Description

Technical field [0001] The invention belongs to the technical field of polymer material preparation, and specifically relates to a cationic dyeable polyurethane elastic fiber and a preparation method thereof. The polyurethane elastic fiber prepared by the invention has the function of being dyeable with cationic dyes, and can be blended with cationic dyeable polyester for dyeing under normal pressure, with high dye uptake, good dyeing fastness and bright colors. Background technique [0002] Due to the advantages of high breaking strength, high breaking elongation and good elastic recovery rate, polyurethane elastic fibers have been widely used in elastic fabric materials, such as tights, aerobics, underwear, high-elastic stockings and swimwear. [0003] Under normal circumstances, the fabric blended with spandex fiber and other synthetic fibers or natural fibers has to undergo a dyeing process. However, due to the chemical structure of spandex fiber, that is, there is not enough f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94C08G18/66C08G18/48C08G18/32C08G18/12
CPCC08G18/12C08G18/3855C08G18/4854C08G18/6666D01F6/94C08G18/3206
Inventor 薛士壮钱锦晋中成刘珊珊费长书杨晓印
Owner 华峰重庆氨纶有限公司
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