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Preparation method for fluorescent spandex

A spandex and fluorescent technology, applied in the field of polyurethane fibers, can solve the problems of poor bonding force of spandex fibers and high cost of rare earth raw materials, and achieve the effect of rich colors

Inactive Publication Date: 2014-11-05
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the currently published technologies, the patent No. 201010249001.1 discloses rare earth compound modified spandex fiber and its preparation method; this method uses the addition of fluorescent rare earth complexes to modify spandex to obtain fluorescent spandex fiber, but the rare earth raw material used in this method High cost and poor bonding with spandex fibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Add 3-(2'-benzothiazolyl)-7-diethylaminocoumarin to N,N-dimethylacetamide, stir and dissolve to form an organic solution with fluorescent properties, the solution concentration 7%;

[0029] 2) Mixing polyether polyol and diisocyanate to obtain an -NCO-terminated polyurethane prepolymer, adding an organic solvent to fully dissolve it, and obtaining a prepolymer solution;

[0030] 3) adding the organic solution with fluorescent properties prepared in step 1) into the prepared amine solution, stirring and mixing evenly;

[0031] 4) Add the above-mentioned amine solution to the prepolymer solution to carry out chain extension reaction. After the reaction is completed, add spandex auxiliary agent to obtain spandex spinning stock solution, 3-(2'-benzothiazolyl)-7-diethylamino Coumarin accounts for 0.5% of the solid content of the stock solution;

[0032] 5) The prepared spandex spinning dope with fluorescent effect is spun and formed by means of a dry spinning system to ...

Embodiment 2

[0033] Example 2: 1) Add 2,5-diphenyl-1,3,4-oxadiazole to N,N-dimethylacetamide, stir and dissolve to form an organic solution with fluorescent properties, the solution concentration 20%;

[0034] 2) Mixing polyether polyol and diisocyanate to obtain an -NCO-terminated polyurethane prepolymer, adding an organic solvent to fully dissolve it, and obtaining a prepolymer solution;

[0035] 3) adding the organic solution with fluorescent properties prepared in step 1) into the prepared amine solution, stirring and mixing evenly;

[0036] 4) Add the above amine solution to the prepolymer solution to carry out chain extension reaction. After the reaction is completed, add spandex auxiliary agent to obtain spandex spinning stock solution, 2,5-diphenyl-1,3,4-oxadiazole 3% of the solid content of the stock solution;

[0037] 5) The prepared spandex spinning dope with fluorescent effect is spun and formed by means of a dry spinning system to obtain spandex fiber with fluorescent effect...

Embodiment 3

[0039] 1) Add 1,8-naphthalimide to N,N-dimethylacetamide, stir and dissolve to form an organic solution with fluorescence properties, and the solution concentration is 35%;

[0040] 2) Mixing polyether polyol and diisocyanate to obtain an -NCO-terminated polyurethane prepolymer, adding an organic solvent to fully dissolve it, and obtaining a prepolymer solution;

[0041] 3) adding the organic solution with fluorescent properties prepared in step 1) into the prepared amine solution, stirring and mixing evenly;

[0042] 4) adding the above-mentioned amine solution into the prepolymer solution for chain extension reaction, adding spandex auxiliary agent after the reaction is completed to obtain a spandex spinning stock solution, 1,8-naphthalimide accounts for 7% of the solid content of the stock solution;

[0043] 5) The prepared spandex spinning dope with fluorescent effect is spun and formed by means of a dry spinning system to obtain spandex fiber with fluorescent effect.

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Abstract

The invention relates to a preparation method for fluorescent spandex and belongs to the technical field of differential polyurethane elastic fibers. The method comprises the following steps: firstly, adding an organic small-molecular luminous material into an organic solvent, and agitating and dissolving to form an organic solution with fluorescence characteristics; mixing polyethylene-polypropylene glycol with diisocyanate to prepare a -NCO blocked polyurethane prepolymer; adding the organic solvent to sufficiently dissolve the prepolymer to obtain a prepolymer solution; secondly, adding the organic solution with the fluorescence characteristics into a prepared mixed amine solution, and agitating and mixing uniformly; thirdly, adding the mixed amine solution into the prepolymer solution and carrying out a chain extension reaction; after the reaction, adding a spandex auxiliary agent to obtain a polyurethane-urea solution; and finally, spinning and molding by a dry-process spinning system to obtain spandex fibers with fluorescence effects. The fluorescent spandex prepared by the method provided by the invention has the advantages of safety and environmental friendliness, low cost, abundant fluorescent colors and the like, and strong binding force between the organic small-molecular luminous material and the spandex is realized.

Description

technical field [0001] The invention relates to a method for preparing fluorescent spandex, belonging to the technical field of polyurethane fibers. Background technique [0002] Spandex is the abbreviation of polyurethane elastic fiber (Polyurethane), which has good elastic properties and breaking strength, so it is widely used in the field of textiles. With the continuous improvement of consumers' requirements for product comfort, the properties of spandex products such as resilience, sweat resistance, and seawater resistance are far from meeting the requirements. It is the general trend to develop spandex products with more functions. Fluorescent spandex products can make textiles have fluorescent effects, meet the needs of use in certain fields, and are also an important part of differentiated spandex products. [0003] Among the currently published technologies, the patent No. 201010249001.1 discloses rare earth compound modified spandex fiber and its preparation metho...

Claims

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Application Information

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IPC IPC(8): D01F6/94D01F1/10C08G18/48C08G18/32
Inventor 陈铃刘亚辉池晓智毛植森许图远梁红军费长书
Owner ZHEJIANG HUAFENG SPANDEX
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