Leukofarbstoff und ihn enthaltendes Aufzeichnungsmaterial

A new leuco dye is capable of developing into a colored dye which has an absorption band in the near infrared region. The new leuco dye has the following formula (I): (I) wherein each of R1, R2 and R3 independently is hydrogen, an alkyl group, an aralkyl group, a cycloalkyl group or an aryl group; e...

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Bibliographic Details
Main Authors SATO, KOZO, MINAMI-ASHIGARA, KANAGAWA, JP, HARADA, TORU, MINAMI-ASHIGARA, KANAGAWA, JP
Format Patent
LanguageGerman
Published 11.02.1999
Edition6
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
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Summary:A new leuco dye is capable of developing into a colored dye which has an absorption band in the near infrared region. The new leuco dye has the following formula (I): (I) wherein each of R1, R2 and R3 independently is hydrogen, an alkyl group, an aralkyl group, a cycloalkyl group or an aryl group; each of X1 and X2 independently is oxygen, sulfur or -NR4- (R4 has the same meaning as for R1, R2 and R3); each of the rings A to E independently is benzene ring or naphthalene ring and may have one or more substituent groups; and each of R1 to R4 may have one or more substituent groups. A recording material containing the leuco dye is also disclosed.
Bibliography:Application Number: DE19883804437