Invention Grant
- Patent Title: Aqueous pigment dispersion liquid and ink-jet recording ink
- Patent Title (中): 水性颜料分散液和喷墨记录油墨
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Application No.: US12091544Application Date: 2006-10-31
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Publication No.: US08779027B2Publication Date: 2014-07-15
- Inventor: Satoshi Idemura , Kenji Sugo , Tomoyuki Uezono
- Applicant: Satoshi Idemura , Kenji Sugo , Tomoyuki Uezono
- Applicant Address: JP Tokyo
- Assignee: DIC Corporation
- Current Assignee: DIC Corporation
- Current Assignee Address: JP Tokyo
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2005-316166 20051031
- International Application: PCT/JP2006/321727 WO 20061031
- International Announcement: WO2007/052644 WO 20070510
- Main IPC: C09D11/00
- IPC: C09D11/00

Abstract:
A production method of an aqueous pigment dispersion liquid of the present invention includes: a kneading step of kneading a mixture including (a) C. I. pigment violet 23, (b) a styrene-acrylic acid-based copolymer with an acid value of 50 to 300 mgKOH/g, (c) an alkali metal hydroxide, (d) water, and (e) a wetting agent, thereby producing a colored, kneaded material; and a dispersion step of dispersing the pigmented, kneaded material in an aqueous medium by using a dispersing machine with media, wherein the mass ratio of (b)/(a) in the kneading step is within a range of 0.15 to 0.45, the mass ratio of (d)/(a) in the first half of the kneading step is within a range of 0.04 to 0.42, and the change in viscosity of materials to be dispersed in the dispersion step is 10% or lower.
Public/Granted literature
- US20090221733A1 AQUEOUS PIGMENT DISPERSION LIQUID AND INK-JET RECORDING INK Public/Granted day:2009-09-03
Information query
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