New tetracarbonyl compounds of the formula ##STR1## where R is a hydrogen atom, an alkyl radical or an aryl radical. The invention also contemplates the thermostable polymers obtained by reacting an aromatic tetra-amine with at least one of the above tetracarbonyl compounds.
新的四羰基化合物的
化学式为##STR1##其中R是氢原子、烷基基团或芳基基团。该发明还考虑了通过将芳香四胺与上述至少一种四羰基化合物反应而获得的热稳定聚合物。