| 摘要 |
Process for the preparation of a water-soluble and/or water-dispersible copolyester comprising terephthalate, isophthalate, sulphoaryldicarboxylate, ethylene glycol and polyoxyethylene glycol units, characterised in that it comprises the following successive stages: … … - a transesterification (interchange) reaction between, on the one hand, dimethyl terephthalate and a dimethyl sulphoaryldicarboxylate and, on the other hand, ethylene glycol; … - a direct esterification reaction between isophthalic acid and a new quantity of ethylene glycol; … - a polycondensation reaction. … …<??>It also relates to the use of these polyesters for sizing textile yarns. |
