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
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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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