Siemens Aktiengesellschaft

Siemens Aktiengesesllschaft

Roland Gestigkeit

Recai Sezi

Hellmut Ahne

Eberhard Kuehn

Kurt Geibel

In a process for the preparation of poly-o-hydroxyamides and poly-o-mercaptoamides, a bis-o-aminophenol or a bis-o-aminothiophenol is reacted with a dicarboxylic acid derivative with the following structure:

Preparation of poly-O-hydroxyamides and poly O-mercaptoamides

In a process for the preparation of poly-o-hydroxyamides and poly-o-mercaptoamides, a bis-o-aminophenol or a bis-o-aminothiophenol is reacted at a temperature of .ltoreq.0.degree. C. with a mixed dianhydride of a dicarboxylic acid and a sulfonic acid with the following structure:

Preparation of poly-o-hydroxyamides and poly-o-mercaptoamides

A method for producing poly-o-hydroxy amides by heating a dicarboxylic acid to a temperature .gtoreq.80.degree. C., together with a sulfonic acid chloride and a tertiary amine in a suitable solvent, to form a reaction mixture and reacting the mixture obtained with a bis-o-aminophenol solution at a temperature &lt;80.degree. C.

Method for the production of poly-o-hydroxyamides

In a process for the preparation of poly-o-hydroxyamides and poly-o-mercaptoamides, a bis-o-hydroxyamide or a bis-o-mercaptoamide is reacted with a dihydroxy compound in the presence of a basic catalyst.

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Nuremberg, Germany

Roland Gestigkeit