JP2897641B

JP2897641B

PURPOSE:To provide a crystal transformation of 4,4'-bis{N'-(p-toluenesulfonyl) ureido}diphenylmethane forming colored images having highly excellent storage stability, and giving heat-sensitive recording media especially excellent in whiteness, sensitivity, etc. CONSTITUTION:This crystal t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: IWASAKI AKIKO, TAKAHASHI YOSHUKI
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
APPARATUS THEREFOR
CHEMISTRY
COLOUR PRINTING
GENERAL METHODS OF ORGANIC CHEMISTRY
LINING MACHINES
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PRINTING
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES
STAMPS
TRANSPORTING
TYPEWRITERS
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Beschreibung
Zusammenfassung:PURPOSE:To provide a crystal transformation of 4,4'-bis{N'-(p-toluenesulfonyl) ureido}diphenylmethane forming colored images having highly excellent storage stability, and giving heat-sensitive recording media especially excellent in whiteness, sensitivity, etc. CONSTITUTION:This crystal transformation of the compound represented by the formula has a crystal (B) exhibiting strong peaks at diffraction angles (2theta) of 10.2 deg., 14.1 deg. and 19.1 deg. and intermediately strong peaks at diffraction angles of 6.6 deg., 8.4 deg. and 15.6 deg. with Cu-Kalpha rays. The crystal transformation having crystallinity exhibiting strong peaks at the diffraction angles (2theta) of 6.0 deg. and 21.2 deg. and intermediately strong peaks at 15.8 deg. and 19.0 deg., or having an amorphous state is preferable.