WATER-SOLUBLE AZO COMPOUND, INK COMPOSITION AND COLORED MATERIAL

• Main Authors: DEJIMA YOSHIYUKI, TAKAHASHI SHINJIRO, SHIRASAKI YASUO
• Format: Patent
• Language: English
• Published: 13.04.2006
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COLOUR PRINTING; CORRECTING FLUIDS; CORRECTION OF TYPOGRAPHICAL ERRORS; DYES; FILLING PASTES; HETEROCYCLIC COMPOUNDS; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; INKS; 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; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide a yellow pigment having a hue having high clarity suitable for an inkjet recording, also having high fastness of recorded materials and excellent in preservation stability, and an ink composition containing the same. SOLUTION: This ink composition contains a water-soluble azo compound expressed by formula (1) [wherein, R1is H or a 1-3C alkyl; Y1is carboxy, methyl or phenyl; Y2is hydroxy or amino; Y3, Y4are each independently H, sulfonic acid or carboxy, and at least one of the Y3and Y4is sulfonic acid or carboxy; A is an aliphatic amine residue, an aromatic amine residue, hydroxy or an azo compound residue; and B is an aliphatic amine residue, an aromatic amine residue or hydroxy], or its salts. COPYRIGHT: (C)2006,JPO&NCIPI