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US 4,418,181 AGranted
Polyimides having bis-maleimide terminal groups
AssigneePlastics Engineering Company
InventorWalter J. Monacelli
Life of this patent
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Abstract
The compositions described herein comprise polyimides having bis-maleimide terminal groups and having the formula: ##STR1## wherein Q is a trivalent aromatic radical, Ar is a divalent aromatic radical, Ar" is a tetravalent aromatic radical and n has a value of 0-20. Derivatives may be made of these compounds by homopolymerization, copolymerization with other copolymerizable materials and by reaction with Diels-Alder reactable materials.
Claims27
A tetra-maleimide polyimide having the formula:
- ##STR32## wherein Q is a trivalent aromatic radical;
- Ar" is a tetravalent aromatic radical, the four carbonyl groups being attached directly to separate carbon atoms of said aromatic radical and each pair of carbonyl groups being attached to adjacent carbon atoms or peri carbon atoms in Ar";
- Ar is a divalent aromatic radical;
- and
- n is zero or an integer having a value of 1-20.
2 more elements
Dependencies are inferred from the claim text.