Title:
AZO COMPOUND, INK COMPOSITION AND COLORING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2006/051850
Kind Code:
A1
Abstract:
Disclosed is a black compound with excellent solubility which has good storage stability as a recording liquid. When this black compound is used in inkjet recording or writing tools, the recorded matter is excellent in fastness such as light resistance, ozone gas resistance and moisture resistance. Also disclosed is an ink composition containing such a black compound. Specifically disclosed are an azo compound represented by the formula (1) below or a salt thereof, and an ink composition containing the same. (1) (In the formula (1), R1, R2, R5, R6 and R7 independently represent a hydrogen atom, a carboxyl group, a sulfo group or the like; R3 and R4 independently represent a hydrogen atom, a sulfo group, a nitro group, a C1-C4 alkyl group (which may be substituted by a hydroxyl group or a C1-C4 alkoxy group), a C1-C4 alkoxy group (which may be substituted by a hydroxyl group, a C1-C4 alkoxy group, a sulfo group or a carboxyl group) or the like; and n represents 0 or 1.)
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Inventors:
MATSUI TAKAHIKO (JP)
OHNO HIROAKI (JP)
SHIRASAKI YASUO (JP)
OHNO HIROAKI (JP)
SHIRASAKI YASUO (JP)
Application Number:
PCT/JP2005/020598
Publication Date:
May 18, 2006
Filing Date:
November 10, 2005
Export Citation:
Assignee:
NIPPON KAYAKU KK (JP)
MATSUI TAKAHIKO (JP)
OHNO HIROAKI (JP)
SHIRASAKI YASUO (JP)
MATSUI TAKAHIKO (JP)
OHNO HIROAKI (JP)
SHIRASAKI YASUO (JP)
International Classes:
C09B33/26; B41J2/01; B41M5/00; B41M5/50; B41M5/52; C09B33/28; C09D11/00; C09D11/326; C09D11/328; C09D11/38; D06P5/00
Foreign References:
| JP2004285351A | 2004-10-14 | |||
| JP2003183545A | 2003-07-03 | |||
| JPS62109872A | 1987-05-21 | |||
| JP2003201412A | 2003-07-18 |
Other References:
See also references of EP 1810999A4
Attorney, Agent or Firm:
Saeki, Norio (Aminosan Kaikan Building 15-8, Nihonbashi 3-chom, Chuo-ku Tokyo 27, JP)
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