Disclosed is polyurethane elastic yarn which has excellent elongation, recoverability and light resistance and is suitable for stretchable fabric, clothes and the like. For the purpose of obtaining the polyurethane elastic yarn, at least one of the following materials (A), (B) and (C) is blended when polyurethane elastic yarn is produced using a polymer diol and a diisocyanate as starting materials. (A) a benzotriazole ultraviolet absorbent and/or a benzophenone ultraviolet absorbent, which contains one or more unsaturated bonds in each molecule (B) a benzotriazole ultraviolet absorbent which contains one or more alkoxy groups in each molecule (C) a benzophenone ultraviolet absorbent which contains one or more sulfonic acid groups in each molecule.
本发明公开了一种聚
氨酯弹性纱线,该纱线具有优异的伸长率、回复性和耐光性,适用于弹力织物、服装等。为了获得这种聚
氨酯弹性纱线,在使用聚合物二元醇和二
异氰酸酯作为起始材料生产聚
氨酯弹性纱线时,至少要混合以下材料(A)、(B)和(C)中的一种。(A) 苯并三唑
紫外线吸收剂和/或
二苯甲酮紫外线吸收剂,其每个分子中含有一个或多个不饱和键 (B) 苯并三唑
紫外线吸收剂,其每个分子中含有一个或多个烷氧基 (C)
二苯甲酮紫外线吸收剂,其每个分子中含有一个或多个
磺酸基。