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High-performance polyurethane for biological easily degradable spandex and preparation method of high-performance polyurethane

A biodegradable polyester, high-performance technology, applied in the manufacture of rayon, one-component synthetic polymer rayon, chemical characteristics of fibers, etc., can solve the problems of high price, secondary pollution, high recycling cost, and achieve modified The process is simple, the elongation at break and resilience are improved, and the effect of improving the strength of spandex

Active Publication Date: 2019-02-15
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For textile waste pollution, the current effective solutions mainly include: 1. Recycling for secondary use. Spandex textiles are complex in technology, but the recycling cost is high and the performance of the recycled products is average or poor. Generally, they can only be used as low-end products. Moreover, new environmental protection issues such as secondary pollution may occur during the recycling process; 2. Develop biodegradable spandex fibers, so that spandex waste can be degraded quickly under the action of microorganisms in the natural environment, and finally produce pollution-free Carbon dioxide, water and some non-polluting inorganic salts
[0003] Patent CN104630929B discloses a preparation method of spandex for biodegradable paper diapers, which mainly improves the degradability by using biodegradable additives. These biological additives are relatively expensive and have a certain impact on the spinnability of spandex, so This preparation method is only applicable to the field of thick spandex used in paper diapers, and it is not suitable for conventional spandex
Patent CN106605014A proposes a method for preparing elastic spandex fibers using biologically derived butanediol, but the current sources of biomass materials are relatively narrow, and the output is limited, which cannot meet the growing demand for spandex

Method used

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  • High-performance polyurethane for biological easily degradable spandex and preparation method of high-performance polyurethane
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  • High-performance polyurethane for biological easily degradable spandex and preparation method of high-performance polyurethane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: Under nitrogen protection conditions, 169.5g polytetramethylene ether glycol (molecular weight 1810), 2.58g polycaprolactone diol (molecular weight 2000), 39.8g4,4-diphenylmethane diisocyanate Adding it into the reactor, the reaction temperature is 65°C, and the reaction time is 2 hours, to obtain an easily biodegradable polyester polyol modified prepolymer (PP) terminated with a certain mass fraction of -NCO;

[0026] Step 2: Add 494.44 g of DMAC to the prepolymer (PP) prepared in step 1 under the condition of 20°C and nitrogen protection, and stir for 1 hour at a stirring rate of 100 rpm to obtain a uniform prepolymer solution (PPs);

[0027] Step 3: On the basis of step 2, with a stirring rate of 170 rpm, 108g of mixed amine DMAC solution (including 0.22g of propylenediamine, 3.39g of ethylenediamine, 0.56g of diethylamine, and 0.2g of ethanolamine) was slowly added dropwise Add in the above-mentioned homogeneous prepolymer solution (PPs) in a manner, and ad...

Embodiment 2

[0030] Step 1: Under nitrogen protection conditions, 165.7g polytetramethylene ether glycol (molecular weight 1810), 5.16g polycaprolactone diol (molecular weight 2000), 39.8g4,4-diphenylmethane diisocyanate Adding it into the reactor, the reaction temperature is 65°C, and the reaction time is 2 hours, to obtain an easily biodegradable polyester polyol modified prepolymer (PP) terminated with a certain mass fraction of -NCO;

[0031] Step 2: Add 491.56 g of DMAC to the prepolymer (PP) prepared in Step 1 under the condition of 20°C and nitrogen protection, and stir for 1 hour at a stirring rate of 100 rpm to obtain a uniform prepolymer solution (PPs);

[0032] Step 3: On the basis of step 2, with a stirring rate of 170 rpm, 107.5g of mixed amine DMAC solution (including 0.22g of propylenediamine, 3.37g of ethylenediamine, 0.56g of diethylamine, and 0.2g of ethanolamine) was slowly dropped Add the above-mentioned high-performance prepolymer solution (PPs) by adding, and add fun...

Embodiment 3

[0035] Step 1: Under nitrogen protection conditions, 165.3g polytetramethylene ether glycol (molecular weight 1810), 8.70g aliphatic polycarbonate diol (molecular weight 2000), 41g4,4-diphenylmethane diisocyanate Adding it into the reactor, the reaction temperature is 70°C, and the reaction time is 2 hours to obtain an easily biodegradable polyester polyol modified prepolymer (PP) terminated with a certain mass fraction of -NCO;

[0036] Step 2: Add 5001.68 g of DMAC to the prepolymer (PP) prepared in step 1 under the condition of 20°C and nitrogen protection, and stir for 1 hour at a stirring rate of 100 rpm to obtain a uniform prepolymer solution (PPs);

[0037] Step 3: On the basis of step 2, with a stirring rate of 170 rpm, 109.7g of mixed amine DMAC solution (including 0.22g of propylenediamine, 3.44g of ethylenediamine, 0.57g of diethylamine, and 0.2g of ethanolamine) was slowly dropped Add the above-mentioned high-performance prepolymer solution PPs, and add functional...

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Abstract

The invention discloses high-performance polyurethane for biological easily degradable spandex and a preparation method of the high-performance polyurethane. The high-performance polyurethane is prepared by synthesizing biological easily degradable polyether polyol, polyether polyol, 4,4-diphenylmethane diisocyanate, a chain extender and a functional aid for spandex, wherein the biological easilydegradable polyether polyol accounts for 1-50% of the polyether polyol in the high-performance polyurethane for the biological easily degradable spandex; the biological easily degradable polyether polyol, the polyether polyol and the 4,4-diphenylmethane diisocyanate are subjected to a copolymerization reaction to generate a high-performance prepolymer, and high-performance spandex spinning stosteis prepared through a chain extension reaction. The polyurethane for the spandex prepared with the method has the characteristics of biological easy degradation, high strength, high modus and the like.

Description

technical field [0001] The invention relates to a method for preparing high-performance polyurethane for biodegradable spandex, belonging to the technical field of polyurethane material manufacture and weaving. Background technique [0002] In recent years, with the continuous improvement of living standards, high-end textiles such as spandex have been widely used in various fields of life, bringing comfort and convenience to people's lives, but also bringing new problems: while the output continues to increase, spandex Textile waste is also on the rise, and these wastes have become one of the important sources of environmental pollution today. For textile waste pollution, the current effective solutions mainly include: 1. Recycling for secondary use. Spandex textiles are complex in technology, but the recycling cost is high and the performance of the recycled products is average or poor. Generally, they can only be used as low-end products. Moreover, new environmental prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10C08G18/76C08G18/66C08G18/48C08G18/42C08G18/44C08G18/12C08G18/32
CPCC08G18/12C08G18/4277C08G18/44C08G18/4854C08G18/7671C08G2230/00D01F1/10D01F6/94C08G18/3228
Inventor 蒋曙毛植森钟姜莱张羿新杨晓印刘亚辉
Owner ZHEJIANG HUAFENG SPANDEX
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