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US 4,059,719 AGranted
Process for forming branched nitropolyphenylene
AssigneeStandard Oil Company (Indiana)
InventorsEli W. Blaha, Sandra K. Koster, Chen-Shen Wang
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Abstract
Solid aromatic polymers, such as branched polyphenylenes, are reacted with a reactive gas such as a NO.sub.2 -N.sub.2 O.sub.4 mixture, chlorine and sulfur trioxide without solvent or catalyst. The extent of reaction depends on reaction time and temperature and on the concentration of the reactive gas.
Claims4
A process for preparing branched nitropolyphenylene comprising contacting finely-divided, solid branched polyphenylene with a dinitrogen tetraoxide-nitrogen dioxide gas mixture in the absence of a liquid diluent.
Dependencies are inferred from the claim text.