Process for the preparation of nitrogen-containing polymers
AssigneeHoechst Aktiengesellschaft
InventorsAndree Henze, Gordon Calundann
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Abstract
To prepare nitrogen-containing aromatic polymers, for example polyamides, polyimides and polybenzimidazoles, polyvalent aromatic carboxylic acids and aromatic diamines and/or aminocarboxylic acids or reactive derivatives thereof are reacted in a high-boiling inert solvent with the addition of a heat-stable dispersing auxiliary, and volatile by-products formed in this reaction are distilled off. When the reaction has ended, the batch is cooled and the polymer formed is filtered off.
Claims7
A process for the preparation of a nitrogen-containing polymer in which a polyvalent carboxylic acid and diamine and/or aminocarboxylic acid or a reactive derivative thereof are reacted in a high-boiling inert solvent with the addition of a heat-stable dispersing auxiliary, the volatile by-products formed in this reaction are distilled off and, when the reaction has ended, the batch is cooled and the polymer formed is filtered off, which comprises employing aromatic starting substances.
Dependencies are inferred from the claim text.