Polyurethane urea rubber composite elastic fiber and preparation method thereof

A technology of composite elastic fiber and polyurethane urea, which is applied in the direction of fiber chemical characteristics, conjugated synthetic polymer rayon, single-component synthetic polymer rayon, etc., can solve the damage of spandex strength and elastic recovery rate, spandex difficult to high temperature Dyeing and cooking problems, to achieve good mechanical properties, good heat resistance and high temperature resistance, alkali resistance, chemical corrosion resistance, heat resistance and high temperature resistance

Active Publication Date: 2014-07-02
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But ordinary spandex also has several disadvantages: First, spandex is difficult to withstand long-term high-temperature dyeing and cooking; the higher the dyeing temperature and the longer the time, the more serious the damage to the strength and elastic recovery rate of spandex
But so far, there are no relevant patents or literature reports on the technical method of preparing high-performance elastic fibers by compounding polyurethane urea and nitrile rubber materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Cut 500g of nitrile rubber (acrylonitrile mass fraction is 30%) into small particles with a mass of about 2g, dissolve it in 2000g of ethyl acetate solvent, and keep stirring at 45°C for 3 hours;

[0040] 2. The DCP that takes 25g is dissolved in the 225g ethyl acetate, after stirring, mixes with the nitrile rubber solution that step 1 obtains, mechanically stirs 2 hours, obtains the nitrile rubber mixed solution that viscosity is 3500 poises;

[0041] 3. Add 5.0kg of polytetramethylene ether glycol (PTMG2000) with a molecular weight of 2000, 1.1kg of 4,4'-diphenylmethane diisocyanate (MDI) and 3.5kg of dimethylacetamide (DMAC) Carry out 2 hours pre-polymerization reaction, the reaction temperature is 60 ℃;

[0042] 4. Add 5.4 kg of DMAC to dilute the pre-polymerized product obtained in step 3, and cool to 5°C. Then slowly dropwise add 75.3g ethylenediamine, 45.5g N, the mixture of N'-diisopropyl-1,3-propanediamine as chain extender; Then add 18.5g diethylamine as e...

Embodiment 2

[0047] 1. Cut 750g of nitrile rubber material into small particles with a mass of about 2g, dissolve it in 3000g of ethyl acetate solvent, and keep stirring at 45°C for 3 hours;

[0048] 2. The DPBMH that takes 30g is dissolved in 300g ethyl acetate, after stirring, mixes with the nitrile rubber solution that step 1 obtains, mechanically stirs 2 hours, obtains the nitrile rubber mixed solution that viscosity value is about 5000 poises;

[0049] 3. Mix 4.2kg of PTMG2000 and 0.8kg of PTMG1000 evenly, and then dissolve them with 1.5kg of MDI in 4kg of DMAC for 2.5 hours of pre-polymerization at a temperature of 56°C;

[0050] 4. Dilute the pre-polymerized product obtained in step 3 with 6.0 kg of DMAC and cool to 5°C. Then slowly drop a mixture of 54.2g of ethylenediamine, 18.5g of 1,5-pentanediamine and 6.4g of diethylenetriamine as a chain extender; then add 14.2g of n-butanol as an end-capping agent;

[0051] 5. After the chain extension reaction is completed, add antioxidant...

Embodiment 3

[0055] 1. Cut 800g of nitrile rubber material into small particles with a mass of about 2g, dissolve it in 4000g of DMAC solvent, and keep stirring at 45°C for 4 hours;

[0056] 2. Dissolve 45g of DTBP in 300g of DMAC, stir evenly, mix with the rubber solution obtained in step 1, and mechanically stir for 2.5 hours to obtain a rubber mixture with a viscosity of about 4800 poises;

[0057] 3. Mix 4.5kg of PTMG2000 and 0.5kg of PTMG3000 evenly, and then dissolve them with 1.45kg of MDI in 4.8kg of DMAC for 2 hours of pre-polymerization at a temperature of 50°C;

[0058] 4. Dilute the prepolymerized product obtained in step 3 with 7.2 kg of DMAC and cool to 15°C. Then slowly add 32.5g of 1,3-propanediamine, 15.6g of 1,2-butanediamine, and 19.4g of a mixture of 5-pentanediamine as a chain extender; then add 8.8g of ethanolamine as an end-capping agent;

[0059] 5. After the chain extension reaction is completed, add antioxidants, light stabilizers, lubricants, dyeing auxiliaries,...

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PUM

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Abstract

The invention discloses a polyurethane urea rubber composite elastic fiber and a preparation method thereof. According to the preparation method, a butadiene-acrylonitrile rubber material and polyurethane urea are uniformly mixed through a solution blending mode, lots of strong-polarity nitrile groups are introduced into the fiber, and the interaction force of the polymer molecular chain is increased, so that the fiber has high-temperature resistance and alkali and chemical corrosion resistance. Moreover, the operations of vulcanization cross-linking and stock solution fiber forming are simultaneously finished through a low-temperature low-speed spinning process, the limiting effect on the soft segment of polyurethane urea is increased by utilizing a mico-crosslinking network structure formed by a rubber phase in the fiber forming process, and the mechanical strength and thermal stability of the fiber are further improved.

Description

technical field [0001] The invention belongs to a preparation method of polyurethane urea elastic fiber, in particular to a preparation method of polyurethane urea rubber composite elastic fiber. Background technique [0002] Polyurethane urea fiber (referred to as "spandex") is widely used in high-end clothing, sweatshirts, underwear, socks, swimsuits and other textile fields due to its good elasticity. But ordinary spandex also has several disadvantages: First, spandex cannot withstand long-term high-temperature dyeing and cooking; the higher the dyeing temperature and the longer the dyeing time, the more serious the damage to the strength and elastic recovery rate of spandex will be. Therefore, the dyeing temperature of spandex-containing fabrics generally does not exceed 100°C, and the dyeing time is usually within 2 hours. However, the lower the dyeing temperature and the shorter the dyeing time, the dye is likely to only adhere to the surface of the spandex and cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F8/08D01F8/16C08G18/76C08G18/66C08G18/48
Inventor 许图远梁红军陈厚翔邵晓林毛植森李娟李晓庆
Owner ZHEJIANG HUAFENG SPANDEX
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