| 摘要 |
<p>Method for the preparation of aromatic polyesters by polycondensation of diphenols and of aromatic carboxylic di-acid chlorides according to the polycondensation method in boundary surface of a diphasic system; this reaction mixture process which is comprised on one hand of an aqueous phase containing the diphenolate obtained by addition of the alkaline metal hydroxide, and on the other hand of a liquid organic phase, containing the acid chlorides. The device allowing the method to be implemented is comprised of a reaction vat, provided with a stirrer allowing the dispersion of the two phases in the circuit: the organic phase is continuously said in the direction of the stirring stream and this feeding is effected at a location before the stirring mechanism. This organic phase is comprised a substantially water-free chlorinated solvent, wherein the acid chloride is dissolved. The reaction mixture is then subjected to one or a plurality of mixing steps, preferably into said mixture device, dispersion steps wherein the mixture is imparted with a high speed, the driving cinetic energy of the mixture being then lowered to a low value with respect to its maximum value. </p> |
