Method for the manufacture of polyimidazole and polyimidazo-pyrr

Details Method for the manufacture of polyimidazole and polyimidazo-pyrr Method for the manufacture of polyimidazole and polyimidazo-pyrr

1987-03-03

1989-01-31

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

4284111, 4284735, 528335, 528341, 528342, 528345, 528351, 528353, C08G 7318

Patent

active

048016810

ABSTRACT:
Oligomeric and/or polymeric radiation-reactive polyimidazole and polyimidazo pyrrolone precursors which are soluble in organic solvents, can be prepared with high purity, i.e., especially without chloride, in a simple manner if an aromatic and/or heterocyclic tetraamino compound is reacted in the presence of a carbodiimide, with an olefinically unsaturated monocarboxylic acid and a dicarboxylic acid, or with an olefinically unsaturated monocarboxylic acid and an aromatic and/or heterocyclic tetracarboxylic acid dianhydride, or with an olefinically unsaturated tetracarboxylic acid diester, in the form of an addition product of the tetracarboxylic acid dianhydride and an olefinically unsaturated alcohol. The radiation-reactive precursors prepared in this manner are suitable, for instance, for the manufacture of highly heat-resistant relief structures.

REFERENCES:
patent: 4656244 (1987-04-01), Ahne

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