POLYESTER COMPOSITION HAVING DYEABILITY AT ATMOSPHERIC PRESSURE, METHOD FOR PRODUCING SAME, FIBERS COMPRISING SAME AND MOLDED ARTICLE COMPRISING SAME

摘要

Provided are: a polyester composition which balances structural stability with dyeability of disperse dyes at less than 100° C. when made into fibers; and a method for producing said polyester composition. This polyester composition having dyeability at atmospheric pressure: contains components comprising dicarboxylic acid, a diol and polyethylene glycol, with the main repeating components comprising ethylene terephthalate; and is characterized in that 5-10 mol % of the total diol component has three carbon chains with side chains, the content of polyethylene glycol in the polyester composition is 2-4 wt %, and the content of cyclic dimers is not more than 0.35 wt %.

主权项

1. A polyester composition dyeable with a disperse dye at atmospheric pressure which comprises a polyester containing a dicarboxylic acid, diol and polyethylene glycol and composed mainly of ethylene terephthalate as main repeating component; the polyester containing a diol component containing three carbon chains and having a side chain; the diol component accounting for 5 to 10 mol % of the total diol content; and the content of the polyethylene glycol and the content of cyclic dimers being 2 to 4 wt % and 0.35 wt % or less, respectively, in the polyester composition.