Thermostable resins prepared from bis-maleimides and ammonia

C - Chemistry – Metallurgy – 08 – G

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C08G 73/12 (2006.01) C08G 69/02 (2006.01) C08G 69/26 (2006.01)

Patent

CA 1026495

PRECIS DE LA DIVULGATION: Polymère thermodurcissable, caractérisé en ce qu'il est obtenu par réaction de l'ammoniac avec un polyimide de formule: Image (I) dans laquelle le symbole Y représente un radical organique de va- lence a, a est un nombre variant de 2 à 4 et les symboles A et B, identiques ou différents, représentent chacun un atome d'hydrogè- ne ou de chlore ou un radical méthyl, les proportions de polyimide et d'ammoniac étant telles qu'il y ait au moins 2 groupements imi- de par mole d'ammoniac.

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