Abstract

Unique polyimide oligomers of the invention provide polyimides having superior properties. The polyimide oligomers of the invention require no additional components and they are melt- and solvent-processable with common organic solvents. Moreover, polyimides prepared from the oligomers of the invention have extremely low ionic conductivities which facilitate their use in demanding applications such as hybrid and electric vehicles. The polyimide oligomers of the invention have the general formula: M - (Z-Y-X-Y-Z)n - M wherein n is an integer of 1 to 20; X comprises an aromatic diamine containing 2- 4 aryl moieties, each of which contains 0-4 substituents; Z is independently the same as X or is a different aromatic diamine containing 1-4 aryl moieties, each of which contains 0-4 substituents; Y comprises an aromatic dianhydride containing 1-4 aryl moieties, each of which contains 0-4 substituents; and M is independently the same as Y or is a substituted or unsubstituted anhydride, a substituted or unsubstituted dianhydride, a substituted or unsubstituted bisimide, or a substituted or unsubstituted monomeric or oligomeric phthalonitrile, a multifunctional epoxide, a multifunctional polyepoxide or a multifunctional cyanate ester.

IPC Classes  ?

• C08G 73/10 - PolyimidesPolyester-imidesPolyamide-imidesPolyamide acids or similar polyimide precursors