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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[0027] Example 1:
[0028] 1) Add 3-(2'-benzothiazolyl)-7-diethylaminocoumarin to N,N-dimethylacetamide, stir and dissolve to form an organic solution with fluorescent properties, and the solution concentration is 7%;
[0029] 2) mixing polyether polyol and diisocyanate to prepare -NCO-terminated polyurethane prepolymer, adding an organic solvent to fully dissolve to obtain 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) The above-mentioned amine solution is added to the prepolymer solution, and a chain extension reaction is carried out. After the reaction is completed, a spandex auxiliary agent is added to obtain a spandex spinning stock solution, 3-(2'-benzothiazolyl)-7-diethylamino Coumarin accounts for 0.5% of the solid content of the original liquid;
[0032] 5) Spinning and forming the prepared spandex spinning stock solution with fl...
Example Embodiment
[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 concentration of the solution is 20%;
[0034] 2) mixing polyether polyol and diisocyanate to prepare -NCO-terminated polyurethane prepolymer, adding an organic solvent to fully dissolve to obtain 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, carry out chain extension reaction, after the reaction is completed, add a spandex auxiliary agent to obtain a spandex spinning stock solution, 2,5-diphenyl-1,3,4-oxadiazole accounts for 3% of the solid content of the original liquid;
[0037] 5) Spinning and forming the prepared spandex spinning stock solution with fluorescent effect by means of a dry spinning system to obtain spandex f...
Example Embodiment
[0038] Example 3:
[0039] 1) adding 1,8-naphthalimide to N,N-dimethylacetamide, stirring and dissolving to form an organic solution with fluorescent properties, and the solution concentration is 35%;
[0040] 2) mixing polyether polyol and diisocyanate to prepare -NCO-terminated polyurethane prepolymer, adding an organic solvent to fully dissolve to obtain 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 to the prepolymer solution, carrying out a chain extension reaction, after the reaction is completed, adding a spandex auxiliary agent to obtain a spandex spinning dope, and 1,8-naphthalimide accounts for 7% of the solid content of the dope;
[0043] 5) Spinning and forming the prepared spandex spinning stock solution with fluorescent effect by means of a dry spinning system to obtain spandex fiber w...
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