Radiation-reactive precursor stages of highly heat-resistant polymers

US4371685A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

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

Key dates

• Filing date: Jun 4, 1981
• Grant date: Feb 1, 1983
• Expiry date: Jun 4, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/0387
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to oligomeric and/or polymeric radiation-reactive precursor stages of polymers on the basis of heterocycles and has the objective to make available radiation-reactive precursor stages of this kind in which the problems arising due to the need of using organic solvents are eliminated. For this purpose, the invention provides addition products of cyclic carboxylic-acid anhydrides with hydroxyl group-containing compounds, where the hydroxyl group-containing compounds represent addition products of olefinically unsaturated monoepoxides on carboxyl group-containing prepolymers of polyimides, polyisoindoloquinazoline diones, polyoxazine diones and polyquinazoline diones or on amino group-containing prepolymers of polyimidazoles and polyimidazopyrrolones or on hydroxyl group-containing prepolymers of polyoxazoles. The radiation-reactive precursor stages according to the invention are suited, for example, for the manufacture of highly heat-resistant relief structues.