Polyimides having high tg, high tos, and low moisture regain

Details Polyimides having high tg, high tos, and low moisture regain Polyimides having high tg, high tos, and low moisture regain

C - Chemistry, Metallurgy

08

G

C08G 73/10 (2006.01) B32B 27/34 (2006.01)

Patent

CA 2274264

Polyimide polymers from 3,4,3',4'-biphenyltetracarboxylic dianhydride and 3,4,3',4'-benzophenonetetracarboxylic dianhydride and a diamine such as p-phenylenediamine exhibit a high glass transition temperature, high thermal oxidative stability and low moisture regain, useful for structural applications.

Cette invention se rapporte à des polymères polyimides composés de dianhydride 3,4,3',4'-biphényltétracarboxylique, de dianhydride 3,4,3',4'-benzophénonetétracarboxylique et d'une diamine du type p-phénylènediamine, qui possèdent une température de transition vitreuse (Tg) élevée, une forte stabilité à l'oxydation thermique (TOS) et un faible taux de reprise d'humidité. Ces polymères polyimides s'avèrent utiles à la fabrication de matériaux structuraux.

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