Basf Se Corporation

Jörg Schneider

Georg Sieder

Günter Scherr

Martin Reif

Andreas Eichfelder

Hans Schupp

Stefan Hirsch

Hermann Ascherl

Jürgen Ciprian

Rainer Erhardt

Alain Robert

Dieter Weilacher

Thomas Holtmann

Eva Ruba

Christel Hittinger

Rainer Ehrhardt

Eva Rüba

Process for the preparation of etherified melamine/formaldehyde condensates, in which first a methylolation of melamine with a formaldehyde component in the molar ratio of from 1:6 to 1:15, preferably at a pH of &#x3e;7, is carried out. This is followed by an etherification of the resulting hydroxymethylation intermediate in the presence of a C-C-alkyl, preferably of a C-C-alcohol, particularly preferably of a C-C-alcohol, at a pH of &#x3c;4.5, and subsequently by at least one distillation step in order to remove in particular methanol from the system, the pH of &#x3e;9.5 being established before, during and/or after the distillation. According to the invention, a plurality of hydroxymethylation, etherification and distillation steps follow in order to achieve an etherified melamine/formaldehyde condensate which is distinguished by a high degree of hydroxymethylation, a high solids content and a low viscosity.

Etherified melamine/formaldehyde condensates having a high solid content and low viscosity

The invention relates to a process for preparing polymethylolated melamine and polymethylolated melamine compounds polyetherified with alkanol, wherein the methylolation reaction is carried out in a kneading reactor.

Continuous method for producing highly methylolated melamine and etherified melamine formaldehyde resins

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Wezembeek-Oppern, Belgium

Jörg Schneider