Chromogenic substituted 4,7-diazaphthalides

Chromogenic substituted 4,7-diazaphthalides

The invention relates to novel substituted 4,7-diazaphthalides of the general formula wherein X and Y each independently of the other, are optionally substituted aminophenyl, indolyl, benzoindolyl, jujolidinyl or kairolyl radicals; and R1 and R2, each independently of the other, are hydrogen, lower...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: MILLER, ROBERT E, HOOVER, TROY E
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COLOUR PRINTING
HETEROCYCLIC COMPOUNDS
LINING MACHINES
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PRINTING
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES
STAMPS
TRANSPORTING
TYPEWRITERS
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Beschreibung
Zusammenfassung:The invention relates to novel substituted 4,7-diazaphthalides of the general formula wherein X and Y each independently of the other, are optionally substituted aminophenyl, indolyl, benzoindolyl, jujolidinyl or kairolyl radicals; and R1 and R2, each independently of the other, are hydrogen, lower alkyl or optionally substituted phenyl, provided that both R1 and R2 are not hydrogen. These compounds are particularly suitable for use as color formers in pressure-sensitive or heat-sensitive recording materials.