| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a color fastness-improving agent in order to solve problem of lowering of color fastness of a polylactic acid-based fiber. <P>SOLUTION: The color fastness-improving agent for polylactic acid-based fibers is obtained by including a boric ester-based surfactant having one or more 8-24C hydrophobic groups into a polylactic acid-based resin. In the color fastness-improving agent, the boric ester-based surfactant is a reaction product of a compound obtained by esterifying a polyhydric alcohols with a higher fatty acid with boric acid, or a salt of its reaction product or the boric ester-based surfactant is a reaction product of a compound obtained by esterifying polyhydric alcohols with boric acid with a higher fatty acid, or a salt of its reaction product. <P>COPYRIGHT: (C)2007,JPO&INPIT |
