Dianhydrides

C - Chemistry – Metallurgy – 07 – D

Patent

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260/364.6

C07D 307/60 (2006.01) C07C 51/567 (2006.01) C07C 65/26 (2006.01) C07D 209/48 (2006.01) C07D 307/885 (2006.01) C08G 73/10 (2006.01)

Patent

CA 1066298

ABSTRACT OF THE DISCLOSURE Dianhydrides, of particular utility in the production of polyimides are formed by reacting either phenolphthalein or bisphenol fluorenone with N-methyl-nitrophthalimide followed by hydrolysis and dehydration. The anhydrides have the formula Image where Z is a member selected from the class consisting of the Image group and the Image group.

244023

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