Chromogenic lactam compounds, their production and use

The present invention relates to chromogenic lactam compounds, to processes for their preparation and to their use in pressure- or heat-sensitive recording materials. The lactam compounds according to the invention have the general formula I in which the ring A denotes an aromatic or heteroaromatic...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BAUMANN, HANS, PHAFF, ROX
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COLOUR PRINTING DYES HETEROCYCLIC COMPOUNDS LAKES LINING MACHINES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC CHEMISTRY ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES STAMPS THEIR RELEVANT APPARATUS TRANSPORTING TYPEWRITERS
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