3-SUBSTITUTED ANILINO-8-DI-LOWER-ALKYLAMINO- BENZOL A FLUORAN AND HEAT-SENSITIVE RECORDING MATERIAL CONTAINING THE SAME

NEW MATERIAL:A compound of formula I (R1, R2 are H, lower alkyl, halogen, di-lower alkylamino; R3, R4 are lower alkyl). EXAMPLE:3-Anilino-8-diethylamino-benzo[a]fluoran. USE:Pigment precursor for heat-sensitive recording material: it gives purpleoblack to dark purple pigment with high water and ligh...

Full description

Saved in:
Bibliographic Details
Main Authors HARADA ETSUO, MOTOHASHI KATSUICHI, GONTA MICHIHIRO
Format Patent
LanguageEnglish
Published 30.03.1982
Subjects
ADHESIVES
CHEMISTRY
COLOUR PRINTING
DYES
LAKES
LINING MACHINES
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MORDANTS
NATURAL RESINS
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES
PAINTS
PERFORMING OPERATIONS
POLISHES
PRINTING
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES
STAMPS
TRANSPORTING
TYPEWRITERS
Online AccessGet full text

Cover

More Information
Summary:NEW MATERIAL:A compound of formula I (R1, R2 are H, lower alkyl, halogen, di-lower alkylamino; R3, R4 are lower alkyl). EXAMPLE:3-Anilino-8-diethylamino-benzo[a]fluoran. USE:Pigment precursor for heat-sensitive recording material: it gives purpleoblack to dark purple pigment with high water and light fastness by coming into contact with an electron acceptor such as acid clay or bisphenol-A. PREPARATION:For example, the reaction between an anilinonaphthalene of formula II (R is H, lower alkyl) and a benzophenone derivative of formula III is conducted in the presence of a condensing agent such as conc. sulfuric acid at 0-120 deg.C for several hours. The reaction mixture is poured into water, precipitate is filtered and the cake is refluxed in a volatile organic inert solvent such as toluene and a sodium hydroxide aqueous solution. The organic layer is separated, concentrated and purified.
Bibliography:Application Number: JP19800127975