METHOD FOR PRODUCING POLYIMIDE AND POLYISOINDOLOCHINAZOLINDION PRE-STAGES

摘要

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.