| abstract |
(57) [Summary] [Structure] A specific proportion of one end-blocked polyoxyalkylene polyether having a molecular weight of 6,000 or less is copolymerized and a trivalent carboxylic acid component and / or a trivalent glycol component or a pentavalent Antiesters, especially (a) single hindered phenolic compounds (a component), (b) thiopropionate compounds (b component) and ( c) A soil-releasing polyester composition having an isocyanuric group and containing a hindered phenolic compound (component (c)) other than the compound (a) and having improved wash durability, and a polyester composition thereof. Fiber. [Effect] A polyester fiber having excellent washing durability and soil release property can be obtained. |