METHOD FOR FRACTIONATION OF WATER SOLUBLE OR DISPERSIBLE POLYMERS CONTAINING AMINO GROUPS WITH A BROAD MOLAR MASS DISTRIBUTION

摘要

The invention relates to a method for fractionation of water soluble or dispersible synthetic polymers containing amino groups with a broad molar ma ss distribution by means of ultrafiltration. The polymer solution or dispersion which is to be fractionated is continuously fed into an utltrafiltration circuit comprising at least one ultrafiltration unit and the retentate with a narrower molar mass distribution and the permeate are continuously discharge d in such a way that the ultrafiltration circuit is placed in a substantially stationary state. The invention also relates to polymers which can be obtain ed according to the inventive method and to the use thereof.