| abstract |
Process for obtaining alkaline salts of ester carboxylic acids, which have a COO (-) content of 2 - 18% and a water content of less than 15%, preferably 0.1 - 8, of polyesters containing carboxyl groups and alkaline hydroxides, characterized in that the esters that have 3 - 20% of free carboxyl groups are neutralized in fusion, optionally in the presence of solvents that form an azeotrope with water, at temperatures of -20 to + 50ºC, with potassium lye or 40-70% sodium at a pressure between 0.1 and 760 Torr and, if necessary, the excess water is then separated by distillation at a pressure between 0.1 and 50 Torr and an internal temperature of maximum 50ºC . (Machine-translation by Google Translate, not legally binding) |