INK COMPOSITION - TOYO INK MFG CO

Title:

INK COMPOSITION

Document Type and Number:

WIPO Patent Application WO/2010/027053

Kind Code:

A1

Abstract:

A pigment ink composition for inkjet recording, which can provide excellent print stability, resistance of printed matter and driability. The ink composition is characterized by containing at least a pigment, an organic solvent and two or more kinds of binder resins having different weight average molecular weights (Mw). The ink composition is also characterized in that when the binder resin having the lowest weight average molecular weight (Mw) among the two or more kinds of binder resins is represented by α and the binder resin having a higher weight average molecular weight (Mw) than the binder resin α is represented by β, the following general formulae (1), (2) and (3) are satisfied. general formula (1): Mwβ - Mwα ≥ 10,000 general formula (2): 1,000 < Mwα < 30,000 general formula (3): 20,000 < Mwβ < 100,000 In the formulae, Mwα represents the weight average molecular weight of the binder resin α and Mwβ represents the weight average molecular weight of the binder resin β.

Inventors:

YODA ATSUSHI
AIDA SEIJI
YAMASAKI KEN
FUJIWARA DAISUKE
YAMADA KOUHEI
SHIGEMORI KAZUNORI
UMEZAWA MITSUO

Application Number:

PCT/JP2009/065512

Publication Date:

March 11, 2010

Filing Date:

September 04, 2009

Export Citation:

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Assignee:

TOYO INK MFG CO (JP)
YODA ATSUSHI
AIDA SEIJI
YAMASAKI KEN
FUJIWARA DAISUKE
YAMADA KOUHEI
SHIGEMORI KAZUNORI
UMEZAWA MITSUO

International Classes:

C09D11/00; B41J2/01; B41M5/00

Foreign References:

JP2008519868A	2008-06-12
JP2004115708A	2004-04-15
JP2003292838A	2003-10-15
JP2004263035A	2004-09-24
JP2007284642A	2007-11-01
JP2006056990A	2006-03-02
JP2007169492A	2007-07-05
JP2008228848A	2008-10-02
JP2008301093A	2008-12-11

Other References: