VERFAHREN ZUR HERSTELLUNG VON DURCH SULFOGRUPPEN MODIFIZIERTEN, HOCHDISPERSEN HARNSTOFF-FORMALDEHYD-KONDENSATIONSPOLYMEREN

摘要

The invention relates to the manufacture of urea-formaldehyde condensation polymers containing sulpho groups. The starting material is a urea-formaldehyde precondensate, and a condensation polymer of naphthalenesulphonic acid and formaldehyde is used as the acid catalyst for the subsequent polycondensation of the urea-formaldehyde precondensate. The peculiarity of this polycondensation is that the condensation catalyst is incorporated into the polymer structure of the UF polymer.