Preparation method of spandex with reactive dye easy-dying function

A reactive dye and spandex technology, which is applied in the field of polyurethane elastic fiber material manufacturing, can solve the problems of spandex fiber damage, uneven dyeing of cloth surface, low dye uptake rate, etc., and achieve enhanced reactivity, improved dye uptake effect and color fixation effect of effect

Active Publication Date: 2016-03-30
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the composite textiles of spandex and cellulose fibers generally require reactive dyes to be dyed at 100°C, and spandex molecules lack groups that react with reactive dyes, it is difficult for reactive dyes to form covalent bonds with it. Low reactivity, so

Method used

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  • Preparation method of spandex with reactive dye easy-dying function
  • Preparation method of spandex with reactive dye easy-dying function

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preparation example Construction

[0026] A kind of preparation method of reactive dye easily dyeable spandex of the present invention comprises the following steps:

[0027] 1) Add the modification additive to N,N-dimethylacetamide DMAC, stir well for 1 hour, make it uniformly dispersed in the solvent, and form a stable solution for use;

[0028] 2) In the prepolymerization tank, add DMAC and polytetramethylene ether glycol PTMG in sequence, and then add 4,4-diphenylmethane diisocyanate 4,4-MDI according to the set NCO / OH ratio, and fully carry out prepolymerization reaction;

[0029] 3) Transfer the prepolymerization product to the chain extension tank, stir evenly, and at low temperature, control dropwise the mixed amine DMAC solution containing diamine chain extender and monoamine terminator to carry out chain extension and chain termination, and finally obtain polyurethane Urea solution;

[0030] 4) Add a certain proportion of modification aid / DMAC solution to the prepared polyurethane urea solution, per...

Embodiment example 1

[0044] Step 1. Add 5.71kg of hexadecane bromide to 13.32kg of N,N-dimethylacetamide (DMAC) at 40°C, and stir thoroughly for 1 hour to form a stable solution for use.

[0045] Step 2. Add 5kg N,N-dimethylacetamide and 10kg polytetramethylene ether glycol (molecular weight 1800) into the prepolymerization tank, stir and mix well, and when the temperature reaches about 25°C, follow the NCO / Add 2.281kg of 4,4-diphenylmethane diisocyanate to an OH of 1.65, raise the temperature to 45°C, and the reaction time is 120min to obtain a prepolymerized product;

[0046] Step 3. Cool the chain extension tank to 0-10°C, and add chain extension amine solution (including 29.22g propylenediamine, 213.21g ethylenediamine, 37.2g diethylamine, 4851.2gN, N-dimethylethylene Amide), under the condition of rapid stirring, carry out chain extension reaction, obtain polyurethane urea solution;

[0047] Step 4. Add the hexadecane bromide / DMAC solution configured in step 1 to the prepared polyurethane u...

Embodiment example 2

[0051] Step 1. Add 5.45 kg of chlorooctadecane to 11.6 kg of N,N-dimethylacetamide (DMAC) at 45° C. and stir thoroughly for 1 hour to form a stable solution for use.

[0052] Step 2. Add 5kg N,N-dimethylacetamide and 10kg polytetramethylene ether glycol (molecular weight 1800) into the prepolymerization tank, stir and mix well, and when the temperature reaches about 25°C, follow the NCO / Add 2.281kg of 4,4-diphenylmethane diisocyanate to an OH of 1.65, raise the temperature to 45°C, and the reaction time is 120min to obtain a prepolymerized product;

[0053] Step 3. Cool the chain extension tank to 0-10°C, and add chain extension amine solution (including 29.22g propylenediamine, 213.21g ethylenediamine, 37.2g diethylamine, 4851.2gN, N-dimethylethylene Amide), under the condition of rapid stirring, carry out chain extension reaction, obtain polyurethane urea solution;

[0054] Step 4. Add the chlorooctadecane / DMAC solution configured in step 1 to the prepared polyurethane ure...

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Abstract

The invention relates to a preparation method of spandex with a reactive dye easy-dying function. The method comprises steps as follows: 1), a modifying auxiliary is added to N,N-DMAC (dimethylacetamide), and the mixture is stirred to form a stable solution; (2), DMAC and PTMG (polytetramethylene ether glycol) are sequentially added to a prepolymerization tank, 4,4-MDI (diphenyl-methane-diisocyanate) is added according to the set proportion of NCO/OH, and sufficient prepolymerization is performed; (3), a prepolymerized product is transferred to a chain extension tank, a mixed amine solution is used for performing chain extension and chain termination reactions on the prepolymerized product, and a polyurethane urea solution is obtained; (4), a modifying auxiliary/DMAC solution is added to the prepared polyurethane urea solution, and the mixture is transferred to a stock solution storage tank after the complete reaction; (5), an antioxidant, a lubricating agent, an ultraviolet absorbent and the like are added to the polyurethane urea solution, and the mixture is stirred for dispersion; (6), a dry spinning system is used for drawing and drying of a spinning solution, and the spandex with the reactive dye easy-dying function is obtained through the further reaction of polymer with excessive modifying auxiliaries in a channel.

Description

technical field [0001] The invention relates to a method for preparing spandex easily dyeable with reactive dyes, and belongs to the technical field of polyurethane elastic fiber material manufacturing. Background technique [0002] Polyurethane elastic fiber, commonly known as spandex, is a block copolymer containing repeated urethane groups (-NH-C(=O)-O-) segments in the main chain. It has excellent resilience and dimensional stability, and it can be blended with non-elastic fibers to obtain fabrics, which can greatly improve the wearing comfort of fabrics. However, there are still some problems in the production and application of spandex, which may affect the further application of spandex. From the perspective of spandex products, cotton / spandex interwoven knitted fabrics, viscose / spandex fabrics and other products account for a large part of the application, and the unsatisfactory dyeing effect is more prominent. Since the composite textiles of spandex and cellulose ...

Claims

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Application Information

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IPC IPC(8): D01F6/94D01F1/10C08G18/83C08G18/76C08G18/66C08G18/48C08G18/32C08G18/10
CPCC08G18/10C08G18/4854C08G18/7671C08G18/83D01F1/10D01F6/94C08G18/3228C08G18/2865
Inventor 池晓智温作杨杨晓印邵晓林吴志豪
Owner ZHEJIANG HUAFENG SPANDEX
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