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Aqueous ink set for ink jet recording and ink jet recording method

A technology of inkjet recording and water-based ink, applied in the direction of copying/marking methods, inks, applications, etc., can solve the problems of not being able to obtain high image quality, and cannot fully suppress bleeding, etc.

Inactive Publication Date: 2018-08-03
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, for example, when using the above-mentioned inks for high-speed printing on non-absorbent recording media such as coated paper, coated paper, and plastic films, or low-absorbency recording media, it is practically impossible to sufficiently suppress the blurring of the color boundary between inks of different hues. Bleeding, as a result, high-quality printed matter may not be obtained

Method used

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  • Aqueous ink set for ink jet recording and ink jet recording method
  • Aqueous ink set for ink jet recording and ink jet recording method
  • Aqueous ink set for ink jet recording and ink jet recording method

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Experimental program
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Embodiment

[0275] Hereinafter, the present invention will be further described in detail through examples.

[0276] (Method for producing polymer (A))

Synthetic example 1

[0278] Butyllithium (BuLi) as the polymerization initiator and styrene (St) as the first monomer were figure 1 The tube reactors P1 and P2 in the import figure 1 The T-shaped micro-mixer M1 in the living anion polymerization to form a polymer.

[0279] Next, the resulting polymer was passed through figure 1 In the tubular reactor R1 and moved to figure 1 The T-shaped micro-mixer M2 in the figure 1 The reaction modifier (α-methylstyrene (α-MeSt)) introduced in tubular reactor P3 in 2000 was used to capture the growing ends of the polymer.

[0280] Next, tert-butyl methacrylate (t-BMA) as the second monomer was figure 1 The shown tubular reactor P4 is introduced into the T-shaped micro-mixer M3, and passed through figure 1 The above-mentioned polymers moving in the tubular reactor R2 undergo continuous living anionic polymerization. Thereafter, the reaction was quenched with methanol to produce a block copolymer (PA-1).

[0281] At this time, the entire microreactor was e...

manufacture example 1

[0333] (Manufacturing method of production example 1 aqueous pigment dispersion (C-1))

[0334] The following step 1 is carried out: 150 parts by mass of a phthalocyanine-based pigment Fastogen Blue pigment (manufactured by DIC Corporation: C.I. pigment 15:3) as a pigment, 30 parts by mass of a polymer (P-1) as a polymer (A), and as 150 mass parts of triethylene glycol of water-soluble organic solvent, 20 mass parts of 34% potassium hydroxide aqueous solution drop in the intensive mixer of 1.0L (Japan Eirich Co., Ltd.), at rotor peripheral speed 2.94m / s, disk peripheral speed 1m / s for 25 minutes of mixing.

[0335] Next, the following step 2 was carried out: After slowly adding 450 parts by mass of ion-exchanged water to the kneaded product in the intensive mixer container while stirring continuously, 185 parts by mass of ion-exchanged water was added and mixed to obtain a pigment concentration of 15.0%. Aqueous Pigment Dispersion (C-1).

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Abstract

To provide an aqueous ink set for ink jet recording and an ink jet recording method which provide a non-absorbable recording medium or a low absorbent recording medium with print in which blurring andmixing of colors are reduced. The present invention relates to an aqueous ink set for ink jet recording that includes first to n-th aqueous inks for ink jet recording, each aqueous ink comprising a pigment, water, a surfactant, a binder resin, ureas, and a water-soluble organic solvent (1), which has a boiling point of 100 DEG C to 200 DEG C and a vapor pressure at 20 DEG C of 0.5 hPa or more. All of the first to n-th aqueous inks satisfy a specific formula where, out of the first to n-th aqueous inks, a surface tension of the aqueous ink to be dropped first is [gamma]1 and the surface tension of the aqueous ink to be dropped subsequently is [gamma]2.

Description

technical field [0001] The present invention relates to an aqueous ink set for inkjet recording and an inkjet recording method thereof. Background technique [0002] Water-based pigment inks for inkjet recording can form printed matter excellent in light fastness and the like, and thus have been studied for printing on various media represented by, for example, plain paper, coated paper, coated paper, plastic film, metal, and cloth. [0003] In particular, with the rapid growth of the on-demand printing market in recent years, it is required to be able to print inkjet recording water-based pigment inks on recording media at high speed, and to be able to produce high-quality printed matter comparable to that obtained by lithographic printing. . [0004] In order to print high-quality printed matter at high speed, it is necessary to suppress bleeding (sometimes also called bleeding or color mixing) at the color boundary between inks of different hues. As a method for prevent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/40B41J2/01B41M5/00C09D11/322C09D11/326
CPCB41M5/00C09D11/322C09D11/326C09D11/38C09D11/40B41J2/01B41M5/0023
Inventor 仁尾刚启北出麻衣子塚本卓司
Owner DIC CORP