| 摘要 |
PURPOSE: Provided is a process for producing a polyester resin for producing polyester fiber easily dyeable in a dispersion dye under the atmospheric pressure at a low temperature. CONSTITUTION: The polyester resin is produced by polymerizing ethylene glycol as a first diol component, terephthalic acid or ester thereof as a first acid component, less than 5wt%(based on the total polyester) of an ethylene oxide additive(formula I) of bisphenol-A as a second diol component, and less than 5wt%(based on the total polyester) of trimellitic anhydride or 1,3,5-tricarboxyl benzoic acid as a second acid component, wherein the total amount of the second diol component and the second acid component is 3-7wt%. In the formula, R is hydrogen or C1-C3 hydrocarbon and m and n are an integer of 2-30.
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