Polyimides containing the cyclobutene-3, 4-dione moiety

Details Polyimides containing the cyclobutene-3, 4-dione moiety Polyimides containing the cyclobutene-3, 4-dione moiety

1992-03-03

1993-05-18

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528128, 528170, 528172, 528173, 528176, 528183, 528184, 528185, 528188, 528220, 528229, 4284735, C08G 6926, C08G 7310

Patent

active

052122832

ABSTRACT:
Linear aromatic polyimides containing the cyclobutene-3,4-dione moiety were produced by reacting 1,2-bis(4-aminoanilino)cyclobutene-3,4-dione with several aromatic dianhydrides. The resulting polymers exhibited glass transition temperatures greater than 500.degree. C., adhered tenaciously to glass, and became more flexible after heating for 1 hour at 300.degree. C.

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