Process for preventing cristallization of n,n'-diphenylene...

C - Chemistry – Metallurgy – 08 – G

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C08G 73/10 (2006.01) C08F 222/40 (2006.01) C08G 73/12 (2006.01)

Patent

CA 1156796

PRECIS DE LA DIVULGATION: L'invention concerne un procédé d'obtention de compo- sitions thermodurcissables à base de polyamides d'acides car- boxyliques insaturé, qui permet d'éviter la cristallisation de N,N'-diphénylène bis-imides que l'on rencontre habituellement lors de la fabrication de belles compositions. Selon ce procédé, les compositions thermodurcissables sont préparés en chauffant un N,N'-diphénylène-bis-imide d'acide carboxylique insaturé avec au moins un monomère copolymérisable en présence de N,N'-toluène-bis-maléimide. Les compositions thermodur- cissables ainsi obtenues qui sont homogènes à température ambiante peuvent être utilisées comme résines de coulée sans solvant et d'imprégnation.

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