Heterocyclic nitrogen derivatives of bis(p-dialkylaminophenyl) methane

• Main Author: KRANZ FREDERICK H
• Format: Patent
• Language: English
• Published: 25.04.1961
• Subjects: ADHESIVES; 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; POLISHES; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; STAMPS; TRANSPORTING; TYPEWRITERS

The invention comprises heterocyclic derivatives of bis (p-dialkylamino-aryl) methane in which the alkyl groups each have 1-5 carbon atoms, in which the methane carbon atom is directly linked to a ring nitrogen atom of a benzotriazole, pyrazole, pyrrole, imidazoline, benzimidazole, tetrahydroquinoline or carbazole ring, in which the aryl groups are mononuclear and which is free from chromophoric groups and from acidic groups containing a hydrogen cation. The derivatives are made by condensing an appropriate bis (p-dialkylamino-aryl) methane having attached to the methane carbon atom an atom or group which is reactive with an amino group carrying a hydrogen atom to form a direct link between the methane carbon atom and the nitrogen, with a benzotriazole, pyrazole, pyrrole, imidazoline, benzimidazole, tetrahydroquinoline or carbazole base having at least one hydrogen attached to nitrogen in the ring. The derivatives are employed as colour-forming ingredients in colourless carbon papers and like duplicating sheets (see Group VIII).