| 摘要 |
A polyurethane urea fiber having enhanced chlorine resistance comprises at least 85% segmented polyurethane urea containing 0.05-10 wt.% of a finely divided hydrotalcite, coated with 0.2-15 wt.% a metal fatty acid salt. A polyurethane urea fiber (I) having enhanced chlorine resistance comprises at least 85% segmented polyurethane urea whereby the fiber contains 0.05-10 wt.% of a finely divided hydrotalcite, preferably of formula (1) or (2) and is characterized in that the hydrotalcite is coated with 0.2-15 wt.% a metal fatty acid salt. M1-x2+Alx(OH)2Ax/nn-.mH2O (1) Mg1-yAly(OH)u(A2-)y/2.wH2O (2) M2+ = magnesium; A- = OH-, F-, Br-, CO32-. -SO42-, HPO42-, silicate, acetate or oxalate, preferably CO32-; y = 0.20-0.35; u = 1-10; and w = 0-20. Independent claims are also included for the following: (1) a process for the production of fibers (I) by forming a 20-50 (25-45) wt.% of a long chain synthetic polymer comprising at least 85% segmented polyurethane in an organic solvent such as dime thylacetamide, dimethylformadide or dimethylsulfoxide and spinning by a dry or wet spinning process to form filaments whereby 0.05-10 (2-5) wt.% of hydrotalcite (with respect to the weight of fiber (I)), coated with 0.05-10, preferably 2-5 wt.% of a metal fatty acid salt ,is added to the spinning solution and is distributed within the filaments and/or is on the filament surfaces; and (2) textile goods, preferably cord, knitware or woven goods prepared using the fibers (I), preferably mixed with polyamide, polyamide, polyacrylate, wool, silk or cotton fibers.
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