| abstract |
The invention relates to improved manufacturingnpolyesterpolyols, with modificationntechnological conditions are improvingnusing low boiling glycols as starting materialsnraw materials while avoidingnioh losses, especially by drifting and entrainmentnwith real water. The reaction mixture was heatednat a temperature of 110 to 250 ° C contains a polyesterificationnCatalyst, whereuponnthe vapor phase is led to a gradualnsmoothing and condensed ingredientsnreturn to the realization mixture and discardnthe vapor phase condenses, usuallynphase separated, the organic liquidnthe phase is also returned to the reactionnmixtures. |