Method for the preparation of polyimide and polyisoindoloquinazoline dione precursors

US4654415A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Hellmut Ahne · Königsee, DE
• Eberhard Kuhn · Hemhofen, DE

Key dates

• Filing date: Mar 27, 1985
• Grant date: Mar 31, 1987
• Expiry date: Mar 27, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G73/1007
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Oligomeric and/or polymeric radiation-sensitive polyimide and polyisoindoloquinazoline dione precursors which are soluble in organic solvents, and are of high purity, i.e. in particular chloride-free, are produced simply by first reacting an aromatic and/or heterocyclic tetracarboxylic acid dianhydride with an olefinically unsaturated alcohol to an olefinically unsaturated tetracarboxylic acid diester, and then reacting the latter, in the presence of a carbodiimide, with a diamino compound or a diamino compound having at least one ortho-positioned amino group. The radiation-sensitive precursors thus produced are suitable, for instance, for the production of highly heat-resistant relief structures.