| 摘要 |
The present invention is summarized to obtain spandex and spandex yarn which have excellent dyeing properties by using a spandex polymer having excellent dyeing properties which is obtained by adding an acidic dye additive to an ordinary polyurethane urea solution. The acidic dye additive is an acidic dye additive added to an ordinary polyurethane urea solution, is composed of a spandex polymer obtained by making an amine material having three or more primary or secondary amine groups for each molecule react with an organic isocyanate, wherein the additive is a material which contains three or more amine groups for each molecule, contains two or less primary amines, contains one or more secondary amines, and contains amine materials and organic cyanates with an equivalence ratio of 1.2:1-20:1. |
