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

US5922825A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Recai Sezi · Simmerath, DE
• Hellmut Ahne · Königsee, DE
• Eberhard Kuehn · Hemhofen, DE

Key dates

• Filing date: Aug 29, 1996
• Grant date: Jul 13, 1999
• Expiry date: Aug 29, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/0233
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

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: ##STR1## where D=O, S, or NH, and where R* is the parent body of the dicarboxylic acid and at least one of the groups R.sup.1 through R.sup.5 is F or CF.sub.3.