Preparation method of comfortable polyurethane elastic fiber
A polyurethane elasticity and comfort technology, applied in the field of polyurethane elastic fibers, can solve problems such as clogging of filters and oxidation, and achieve the effects of reducing modulus, wearing comfort, and improving softness
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[0025] Example 1:
[0026] 1) Add 4,4'-oxobis(benzenesulfonyl semicarbazide) into N,N-dimethylacetamide, and conduct high-speed grinding in a ball mill to form a uniform and stable 4,4'-oxobisamide. (benzenesulfonyl semicarbazide) solution, its concentration is 25%, and the decomposition temperature of 4,4'-oxobis(benzenesulfonyl semicarbazide) is 210°C-220°C;
[0027] 2) mixing polyether polyol and diisocyanate to prepare -NCO-terminated polyurethane prepolymer, adding N,N-dimethylacetamide to fully dissolve to obtain a prepolymer solution;
[0028] 3) carrying out chain extension with prepolymer solution and diamine to obtain polyurethane stock solution;
[0029] 4) Add 4,4'-oxobis(benzenesulfonyl semicarbazide) solution to the polyurethane stock solution, the mass of 4,4'-oxobis(phenylsulfonyl semicarbazide) accounts for 0.08% of the solid content of the polyurethane stock solution , stir and mix evenly, then add other conventional auxiliaries, and get the spinning dope a...
Example Embodiment
[0034] Example 2:
[0035] 1) adding barium azodicarboxylate to N,N-dimethylformamide, and performing high-speed grinding in a ball mill to form a uniform and stable barium azodicarboxylate solution with a concentration of 30%, barium azodicarboxylate The decomposition temperature is 240℃-250℃;
[0036] 2) mixing polyether polyol and diisocyanate to prepare -NCO-terminated polyurethane prepolymer, adding N,N-dimethylformamide to fully dissolve to obtain a prepolymer solution;
[0037] 3) carrying out chain extension with prepolymer solution and diamine to obtain polyurethane stock solution;
[0038] 4) Add the barium azodicarboxylate solution to the polyurethane stock solution, the mass of barium azodicarboxylate accounts for 0.28% of the solid content of the polyurethane stock solution, stir and mix evenly, then add other conventional auxiliaries, and obtain spinning through curing and deaeration stock solution;
[0039] 5) With the aid of a dry spinning system, the spinni...
Example Embodiment
[0043] Example 3:
[0044] 1) adding trihydrazine triazine to N,N-dimethylformamide, and performing high-speed grinding in a ball mill to form a uniform and stable trihydrazine triazine solution with a concentration of 15%, trihydrazine triazine The decomposition temperature is 235℃-275℃;
[0045] 2) mixing polyether polyol and diisocyanate to prepare -NCO-terminated polyurethane prepolymer, adding N,N-dimethylformamide to fully dissolve to obtain a prepolymer solution;
[0046] 3) carrying out chain extension with prepolymer solution and diamine to obtain polyurethane stock solution;
[0047] 4) Add the trihydrazine triazine solution to the polyurethane stock solution, the mass of the trihydrazine triazine accounts for 0.45% of the solid content of the polyurethane stock solution, stir and mix evenly, then add other conventional auxiliaries, and obtain spinning through aging and defoaming. stock solution;
[0048]5) With the aid of a dry spinning system, the spinning dope ...
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