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Aqueous pigment dispersion liquid and aqueous pigment inkjet ink using same

A technology of water-based pigments and pigment dispersants, applied in the direction of pigment slurry, application, ink, etc., can solve the problem of color concentration, that is, the reduction of color rendering, and achieve the effects of high refractive index, high light resistance, and high chroma

Active Publication Date: 2014-10-22
DAINICHISEIKA COLOR & CHEM MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ink containing finely divided pigments tends to permeate into the paper, so the color density, that is, the color rendering property tends to decrease.

Method used

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  • Aqueous pigment dispersion liquid and aqueous pigment inkjet ink using same
  • Aqueous pigment dispersion liquid and aqueous pigment inkjet ink using same
  • Aqueous pigment dispersion liquid and aqueous pigment inkjet ink using same

Examples

Experimental program
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Effect test

preparation example Construction

[0065] (Preparation method of water-based pigment dispersion)

[0066] The aqueous pigment dispersion of the present invention can be prepared, for example, by mixing and dispersing a pigment, a pigment dispersant, an aqueous organic solvent, and water by a conventionally known method. A disperser can be used for mixing and dispersing the components. Specific examples of the dispersing machine include kneading machines, two-roll mills, three-roll mills, trade name "MIRACAL KCK" (manufactured by Asada Iron and Steel Co., Ltd.); ultrasonic dispersers; high-pressure homogenizers (trade name The product name is "Mizufluidizer" (manufactured by MIZUHO INDUSTRIAL CO.,LTD.), the product name is "Nanomizer" (manufactured by Yoshida Kikuyo Co., Ltd.), the product name is "Starburst" (manufactured by Sugino Machine Ltd.), the product name is "G-Smasher" ( RIX Corporation)) etc. In addition, ball mills, sand mills, horizontal media mill dispersers, colloid mills, etc. using bead media ...

Embodiment

[0079] Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited to these Examples. In addition, "part" and "%" in an Example and a comparative example are a mass standard unless otherwise indicated.

[0080] [Synthesis of Macromonomer]

Synthetic example 1

[0082] 500 parts of triethylene glycol butyl ether (hereinafter referred to as "BTG") and methyl methacrylate (hereinafter referred to as "MMA") were charged into a reaction vessel equipped with a stirrer, a reflux condenser, a thermometer, and a nitrogen gas introduction tube. 72 parts, 80 parts of cyclohexyl methacrylate (hereinafter referred to as "CHMA"), 48 parts of methacrylic acid (hereinafter referred to as "MAA"), ethyl-2-(α-bromomethyl)acrylate ( 5 parts of 2,2'- azobis (isobutyric acid) dimethyl esters (hereinafter referred to as "EBMA") (hereinafter referred to as "V-601") 2 parts. After polymerization at 75° C. for 3 hours while bubbling nitrogen gas, 1 part of V-601 was added. Further, polymerization was carried out for 4.5 hours to obtain a polymer solution containing a polymer (macromonomer MM-1). The obtained polymer solution was sampled to measure the solid content concentration, and the polymerization conversion rate was calculated as 100% in terms of non-v...

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PUM

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Abstract

An aqueous pigment dispersion liquid for inkjet, which contains a pigment and a pigment dispersant. The pigment dispersant is composed of a graft copolymer and / or a block copolymer, each of which contains a polymer chain (A) and a polymer chain (B). The polymer chain (A) contains 20-60% by mass of a constituent unit that is derived from a first cycloalkyl group-containing (meth)acrylate, 10-35% by mass of a constituent unit that is derived from a (meth)acrylic acid and 5-70% by mass of a constituent unit that is derived from another (meth)acrylate. The polymer chain (B) contains a constituent unit that is derived from a second cycloalkyl group-containing (meth)acrylate and / or a constituent unit that is derived from a (meth)acrylate or a vinyl monomer having an aromatic ring.

Description

technical field [0001] The present invention relates to a pigment dispersion liquid containing a pigment used as a colorant in an inkjet water-based pigment ink, and an inkjet water-based pigment ink using the pigment dispersion liquid. Background technique [0002] Inkjet printers have been extended to various uses such as personal use, office use, business use, recording use, color display use, and color photo use due to their high functionality. In addition, in order to cope with higher speed and higher image quality, miniaturization of ejected liquid droplets (ink droplets) has been promoted by improving the device. In order to make the ejected liquid droplets finer, it is necessary to finely disperse the finer pigments in the dispersion medium while making the pigments (particles) in the ink finer. [0003] By using an ink containing a finer pigment, the sharpness of a printed pattern, the brightness of a color, the density of a color, and the like are gradually improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/326B41J2/01B41M5/00C09B67/08C09B67/20C09B67/46C09D17/00C09D11/00C09D11/322C09D11/38
CPCC09B67/0013B41M5/00C09D17/00B41J2/01C09B67/009C09D11/00C09D11/106C09D11/107C09D11/326C09B67/0033C09B67/0041C08K5/053C08K5/06C08K5/23C08K5/3417C08K5/3437C08K3/04
Inventor 岛中博之青柳真一郎村上贺一狩野克彦
Owner DAINICHISEIKA COLOR & CHEM MFG CO LTD
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