PROBLEM TO BE SOLVED: To provide a dispersant which is used for preparing a polyurethane-based elastic fiber spinning solution, can sufficiently stably disperse fine solid particles in a polyurethane-based elastic fiber spinning solution, can thereby finally give excellent fiber-wound shape packages in a process for spinning the polyurethane-based elastic fiber spinning solution, can impart excellent smoothness and anti-staticity to the unwound fibers, to provide the polyurethane-based elastic fiber spinning solution, and to provide a method for producing the same.;SOLUTION: This dispersant for preparing the polyurethane-based elastic fiber spinning solution uses a mixture of specific two organic phosphates.;COPYRIGHT: (C)2006,JPO&NCIPI
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