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Title:
AQUEOUS PIGMENT DISPERSION, AND AQUEOUS INK FOR INKJET RECORDING
Document Type and Number:
WIPO Patent Application WO/2011/027844
Kind Code:
A1
Abstract:
Disclosed is an aqueous ink for inkjet recording, which utilizes an aqueous pigment dispersion and can achieve superior ink-ejecting properties, coloring properties and image stability. Specifically disclosed is an aqueous pigment dispersion which is characterized by comprising components (A) and (B): (A) an azo pigment which is represented by formula (I) or the like and has at least one X-ray diffraction peak characteristic to each of Bragg angle (2θ) ranges of a 5 to 15° and 20 to 30° in CuKα characteristic X-ray diffraction, a tautomer of the azo pigment, or a salt or hydrate of the azo pigment or the tautomer; and (B): a vinyl polymer containing a specific constituent unit, a constituent unit derived from (a) a monomer having a salt-generating group, and a constituent unit derived from a monomer selected from (b) a styrene macromer and (c) a hydrophobic monomer (wherein the terminal of the main chain of the water-insoluble vinyl polymer has at least either of two or more hydroxy groups and at least one carboxyl group).

Inventors:
TATEISHI KEIICHI
YAMAMOTO HIROSHI
Application Number:
PCT/JP2010/065076
Publication Date:
March 10, 2011
Filing Date:
September 02, 2010
Export Citation:
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Assignee:
FUJIFILM CORP (JP)
TATEISHI KEIICHI
YAMAMOTO HIROSHI
International Classes:
C09B67/46; B41J2/01; B41M5/00; C09B33/12; C09B67/10; C09B67/20; C09B67/48; C09D11/00; C09D11/322; C09D11/326; C09D17/00
Domestic Patent References:
WO2006082669A12006-08-10
Foreign References:
JP2010065212A2010-03-25
JP2010168577A2010-08-05
JP2007063520A2007-03-15
JP2003277662A2003-10-02
JP2005535738A2005-11-24
JP2008231178A2008-10-02
JP2003238854A2003-08-27
JP2006057076A2006-03-02
JP2009205359A2009-09-10
JP2010197182A2010-09-09
Other References:
See also references of EP 2474576A4
HELV. CHIM. ACTA., vol. 41, 1958, pages 1052 - 1056
HELV. CHIM. ACTA, vol. 42, 1959, pages 349 - 352
Attorney, Agent or Firm:
TAKAMATSU, Takeshi et al. (JP)
Takamatsu 猛 (JP)
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