Basf Aktiengesellschaft

Basf Se Corporation

Andreas Eichfelder

Martin Reif

Guenter Scherr

Hans Schupp

Joerg Schneider

Alain Robert

Rainer Erhardt

Günter Scherr

Stefan Hirsch

Jörg Schneider

Georg Sieder

Harald Schaefer

Hermann Ascherl

Boris Gaspar

Jürgen Ciprian

Thomas Holtmann

Juergen Ciprian

Dieter Weilacher

Thorsten Pauen

Harald Schäfer

Christel Hittinger

Eva Ruba

Rainer Ehrhardt

Eva Rüba

The present invention relates to new catalysts for curing solventborne or solvent-free coating compositions, such as 2-component polyurethane coating materials or 2-component polyurethane adhesives.

Catalysts for polyurethane coating compounds

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

The invention relates to a process for preparing free-flowing, pulverulent alkoxycarbonylaminotriazine from an alkanolic reaction mixture which is obtained in the preparation of alkoxycarbonylaminotriazines and comprises at least one alkoxycarbonylaminotriazine, at least one cyclic and/or acyclic carbonic ester, at least one C-C-alkanol which optionally comprises one or two oxygen atoms in the form of ether bonds and is optionally substituted by C-C-alkyl and/or hydroxyl, and also at least one alkali metal or alkaline earth metal alkoxide, with or without melamine and with or without catalyst, by atomizing and drying the reaction mixture in a spray drier.

Process for the preparation of pulverulent alkoxycarbonylaminotriazine

In a process for preparing alkoxycarbonylaminotriazines, di- or triaminotriazines are reacted with cyclic carbonic esters and optionally with minor amounts of acyclic carbonic esters in the presence of an alcohol and of an alkali metal alkoxide or alkaline earth metal alkoxide as a base.

Method for the production of alkoxycarbonylaminotriazines

A process is described for preparing alkoxycarbonylaminotriazines by reacting di- or triaminotriazines with dimethyl carbonate in the presence of an alcohol and of an alkali metal or alkaline earth metal methoxide base.

Preparation of alkoxycarbonylaminotriazines

Method for preparing alkoxycarbonylamino-triazines

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Maxdorf, Germany

Andreas Eichfelder