BIPHENYLTETRACARBOXYLIC ACID DIANHYDRIDE

PROBLEM TO BE SOLVED: To obtain the subject compound useful for the production of a high molecular weight aromatic polyamic acid by dehydrating a biphenyltetracarboxylic acid under a specific heating condition for reducing the contaminating amount of biphenyltricarboxylic acid as less than a specifi...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	KOGA GENJI, IMATANI KATSUO, YAMAMOTO SHINICHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON HETEROCYCLIC COMPOUNDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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