Process for the Preparation of Water-Soluble and/or Water-Dispersible Polyesters and Use Thereof for Sizing Yarn

摘要

the invention relates to a method ofpreparation of water soluble and / or copolyesterwater dispersible patterned poly (ethylene terephthalate)isophtalate, sulfoaryldicarboxylate, glycolpolyoxyethylene glycol, characterized in that it comprisesa multi-step reaction:transesterification (exchange) between thedimethyl terephthalate, and a aryldicarboxylate of sulfurand, on the other hand, the ethylene glycol dimethyl; reactionthe direct esterification of isophthalic acid anda further amount of ethylene glycol; responsethe polycondensation. it also relates to the use of thesepolyesters for sizing textile yarns.