MONOAZO PIGMENT AND METHOD FOR PRODUCING THE SAME

MONOAZO PIGMENT AND METHOD FOR PRODUCING THE SAME

PROBLEM TO BE SOLVED: To provide C.I.Pigment Red 185 giving a colored product having excellent glossiness, and to provide a simple method for producing the C.I.Pigment Red 185 in high productivity employing as little organic solvent as possible for the finishing (pigmentation) treatment enabling mea...

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Bibliographische Detailangaben
Hauptverfasser: SHIMADA KATSUNORI, SHOJI FUMIKO, UI MASAJI
Format: Patent
Sprache:eng
Schlagworte:
ADHESIVES
CHEMISTRY
DYES
LAKES
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MORDANTS
NATURAL RESINS
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES
PAINTS
POLISHES
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide C.I.Pigment Red 185 giving a colored product having excellent glossiness, and to provide a simple method for producing the C.I.Pigment Red 185 in high productivity employing as little organic solvent as possible for the finishing (pigmentation) treatment enabling measures for environmental load and safety to be minimized. SOLUTION: The monoazo pigment is an N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-hydroxy-4-[[2-methoxy-5-methyl-4-[(methylamino)sulfonyl]phenyl]azo]-2-naphthalenecarboxamide pigment with an average aspect ratio of 8.0-16.5. The method for producing the monoazo pigment comprises heating and aging an aqueous slurry containing a coupling product of a precursor of the pigment and water at 100-150°C, where the aqueous slurry is heated and aged at a pH above 12. COPYRIGHT: (C)2004,JPO