Preparation method of porous easy-dyeing spandex

A technology of spandex and solution, which is applied in the field of polyurethane elastic fiber material manufacturing, can solve the problem of little improvement in dyeing performance, achieve excellent biocompatibility and hydrophilicity, increase hydrophilicity, and increase the effect of specific surface area

Active Publication Date: 2014-11-19
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN200710015248.5 adopted The preparation method as a chain extender can effectively improve the dyeing performance of spandex under acid dyes, but for the currently widely used disperse dyes, the degree of improvement in the dyeing performance is not large

Method used

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  • Preparation method of porous easy-dyeing spandex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1. Send 395.16kg of polytetramethylene ether glycol (molecular weight 1800) and 89.97kg of 4,4-diphenylmethane diisocyanate to the first reactor at the same time. The reaction time is 2hr and the reaction temperature is 80°C to obtain prepolymerized matter (PP);

[0028] Step 2. Transport 469.97kg of prepolymer and 573.91kg of N,N-dimethylacetamide (DMAC) solvent to the high-speed dissolving machine at the same time, and under the action of high-speed shear force, PP is fully dissolved to obtain the prepolymer Polymer solutions (PPs);

[0029] Step 3. 1043.88kg prepolymer solution and 286.57kg mixed amine DMAC solution (comprising 1.02kg propylenediamine, 7.72kg ethylenediamine, 0.99kg diethylamine, 0.42kg isopropanolamine), under the condition of rapid stirring Under this condition, chain growth and chain termination occur simultaneously to prepare a polyallophanate polymer solution;

[0030] Step 4. Add 27.48kg containing antioxidant, lubricant, matting agent a...

Embodiment 2

[0033] Step 1. Send 402.50kg of polytetramethylene ether glycol (molecular weight 1800) and 90.17kg of 4,4-diphenylmethane diisocyanate to the first reactor at the same time, the reaction time is 2hr, and the reaction temperature is 80°C to obtain prepolymerized matter (PP);

[0034] Step 2. Transport 487.12kg of prepolymer and 574.42kg of N,N-dimethylacetamide (DMAC) solvent to the high-speed dissolving machine at the same time, and under the action of high-speed shear force, PP is fully dissolved to obtain the prepolymer Polymer solutions (PPs);

[0035] Step 3. 1051.45kg prepolymer solution and 287.23kg mixed amine DMAC solution (including 1.03kg propylenediamine, 7.69kg ethylenediamine, 0.97kg diethylamine, 0.45kg isopropanolamine), under the condition of rapid stirring Under this condition, chain growth and chain termination occur simultaneously to prepare a polyallophanate polymer solution;

[0036] Step 4. Add 16.91kg containing antioxidant, lubricant, matting agent a...

Embodiment 3

[0039] Step 1. Send 375.87kg of polytetramethylene ether glycol (molecular weight 1800) and 83.52kg of 4,4-diphenylmethane diisocyanate to the first reactor at the same time, the reaction time is 2hr, and the reaction temperature is 80°C to obtain prepolymerized matter (PP);

[0040] Step 2. Transport 452.43kg of prepolymer and 554.82kg of N,N-dimethylacetamide (DMAC) solvent to the high-speed dissolving machine at the same time, and under the action of high-speed shear force, PP is fully dissolved to obtain the prepolymer Polymer solutions (PPs);

[0041] Step 3. 1043.88kg prepolymer solution and 273.27kg mixed amine DMAC solution (comprising 0.97kg propylenediamine, 7.12kg ethylenediamine, 0.94kg diethylamine, 0.52kg isopropanolamine), under the condition of rapid stirring Under this condition, chain growth and chain termination occur simultaneously to prepare a polyallophanate polymer solution;

[0042] Step 4. Add 14.44kg containing antioxidant, lubricant, matting agent an...

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Abstract

The invention relates to a preparation method of a porous easy-dyeing spandex. The method is as below: adding polytetramethylene ether glycol PTMG, and 4,4- diphenyl-methane-diisocyanate 4,4-MDI in a first reactor for thorough prepolymerization reaction, so as to obtain an -NCO terminated prepolymer PP; fully dissolving the prepolymer PP in a high-speed dissolving machine by using N,N-dimethylacetamide DMAC as a solvent, so as to obtain a solution PPs containing -NCO terminated prepolymer; conducting chain growth and chain termination on the PPs in a second reactor by using a mixed amine DMAC solution containing a diamine chain extender, a monoamine termination agent and alcohol amine, so as to prepare -OH terminated polyurea carbamate solution; then, adding an antioxidant, a lubricant, a matting agent, an ultraviolet absorbent and polyvinylpyrrolidone PVP, stirring and dispersing; and finally, conducting spinning tension, high temperature drying, oiling and winding formation on the polyurea carbamate solution containing additives with the help of a dry spinning system, so as to obtain the porous easy dyeing spandex.

Description

technical field [0001] The invention relates to a preparation method of porous and easy-to-dye spandex, which belongs to the technical field of polyurethane elastic fiber material manufacturing. Background technique [0002] Polyurethane elastic fiber is commonly known as spandex, and its chemical structure generally consists of two parts: "soft forging" and "hard forging". Soft forging is generally polyether, polyester, etc., and hard forging is generally composed of isocyanate and chain extender (mostly diamine). Due to the thermodynamic incompatibility between soft forging and hard forging, independent micro-domains are formed through dispersion and aggregation, and exhibit respective glass transition temperatures, with excellent elastic tensile properties and breaking strength. Spandex is known as the "industrial monosodium glutamate" of textiles. It can be blended with non-elastic fibers to obtain fabrics, which can greatly improve the comfort and aesthetics of fabrics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10D01D5/04C08G18/76C08G18/66C08G18/48C08G18/32C08G18/10
Inventor 温作杨李燕刘亚辉池晓智梁红军费长书席青
Owner ZHEJIANG HUAFENG SPANDEX
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