| 摘要 |
The present invention relates to water-soluble polyesters with improved heat resistance, a method for manufacturing thereof and a conjugate fiber comprising the same. More specifically, the present invention relates to the water-soluble polyesters with improved heat resistance having effects of: having excellent water solubility in low-temperature hot water and heat resistance based on a high glass transition temperature (Tg), and thus minimizing changes on standing after processing; and improving ease of use as bonding between copolyesters are not created during dry processes of the same which perform in the process of manufacturing various kinds of fibers. The present invention comprises: an esterification product which reacts by including an acid component and a diol component, wherein the acid component comprises aromatic polyvalent carboxylic acid having 6 to 14 carbon atoms, aliphatic polyvalent carboxylic acid having 2 to 16 carbon atoms, and sodium 3,5- dicarbonyl-methoxybenzene sulfonate, and the diol component comprises 1,4:3,6-dian hydro hexitol; and polyethylene glycol so as to comprise polycondensed copolyesters. The copolyesters provide water-soluble polyesters with improved heat resistance which has 98% or more of dissolution rates in hot water at a temperature of 70 °C in accordance with a specific measurement method. |
