Basf Aktiengesellschaft

Guenther Immel

Wolfram Weiss

Rainer Hummerich

Karl-Clemens Peters

Franz Merger

Rolf Fikentscher

Wolf-Dieter Balzer

Hans J Wolf

Hans-Joachim Krause

Herbert Hahn

Hans-Joachim Kraus

Coating materials containing aliphatic .alpha.-hydroxyketones of the general formula ##STR1## where R and R.sup.1 are each hydrogen or a hydrocarbon radical of 1 to 4 carbon atoms, as antiskimming agents. These .alpha.-hydroxyketones are particularly useful in paints and finishes based on oxidatively drying alkyd resins.

Coating materials which contain .alpha.-hydroxyketones as antiskimming

Alkoxyalkylaminotriazine trans-etherification products are obtained by reacting an alkoxyalkylaminotriazine of the general formula ##STR1## where X is hydrogen, alkyl, phenyl, alkylphenyl or ##STR2## A and B are hydrogen, alkyl, alkenyl or ##STR3## and R and R' are hydrogen or alkyl, with from 0.1 to 6 moles, per mole of alkoxyalkylaminotriazine, of a .beta.-hydroxyaldehyde of the general formula ##STR4## where R', R'' and R'' are identical or different and each is hydrogen or alkyl or R'' and R'' together with the .alpha.-carbon atom form a cyclopentane or cyclohexane ring, and R'' and/or R'' can also be hydroxyalkyl and R'' can also be phenyl, in the presence of an acidic catalyst, and removing the alcohol resulting from the trans-etherification. The alkoxyalkylaminotriazine trans-etherification products may be used in baking finishes and acid-hardening surface coatings.

Alkoxyalkylaminotriazine trans-etherification products

A process for the preparation of etherified or non-etherified aminoplast resins, wherein an aminotriazine of the general formula (I) ##STR1## where X is hydrogen, alkyl, phenyl, alkylphenyl or --NH.sub.2, is reacted with a .beta.-hydroxyaldehyde of the general formula (II) ##STR2## where R', R' and R'' are identical or different and each is hydrogen or alkyl, or R' and R'', together with the .alpha.-carbon atom, are a cyclopentane or cyclohexane ring, and R' and/or R'' can be hydroxyalkyl and R' can be phenyl, the reaction being carried out in the presence of not less than one alcohol and an acid catalyst for the preparation of etherified aminoplast resins and in the presence or absence of an acid catalyst for the preparation of non-etherified aminoplast resins. The aminoplast resins prepared according to the invention can be used as surface-coatings raw materials.

Preparation of aminoplast resins

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Weinheim, Germany

Guenther Immel