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Heterocyclic aromatic polymers of the polyimidazopyrrolone class, their prepolymers and their preparation
Heterocyclic aromatic polymers of the polyimidazopyrrolone class, their prepolymers and their preparation
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机译:聚咪唑并吡咯烷酮类杂环芳香族聚合物,其预聚物和制备方法
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摘要
Long-chain polymeric polyimidazopyrrolones (also referred to as pyrrones) have macromolecular chains of the formula: ##STR1## where A is a tetravalent organic radical and n is a large whole number. The polymers have film-forming properties and can be used in the production of laminates or composite materials, for example, friction pads.
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