Ink composition, recording method using the same, and recorded matter

A recording method and composition technology, applied in the direction of copying/marking method, dyeing polymer organic compound treatment, ink, etc., capable of solving the problems of poor quality of water-soluble dye ink, insufficient glossiness or insufficient uniformity of printed images, etc.

Inactive Publication Date: 2008-03-26
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in this pigment ink, the glossiness and the uniformity of the printed image are not sufficient, and in particular, due to the reflected light of the pigment aggregated on the surface of the paper, a color

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1A～5A

[0123] [Examples 1A to 5A and Comparative Examples 1A to 4A]

[0124] [Adjustment of colorant dispersion]

[0125] A colorant dispersion liquid in which a colorant coated with a water-insoluble polymer was used as dispersed particles was adjusted by the following method.

[0126] (Synthesis of water-insoluble polymers 1-3)

[0127] Use 20 parts by weight of an organic solvent (methyl ethyl ketone), 0.03 parts by weight of a polymer chain transfer agent (2-mercaptoethanol), a polymerization initiator, and each monomer shown in Table 1, add to the fully nitrogen-substituted 2,2'-azobis(2,4-dimethyl 0.9 parts by weight of valeronitrile) was aged at 80° C. for 1 hour to obtain a polymer solution.

[0128] [Table 1]

[0129] The composition of the monomer mixture (weight

[0130] (colorant dispersion 1)

[0131] The polymer solution obtained as the water-insoluble polymer 1 was dried under reduced pressure, 5 parts of the obtained solution were dissolved in 15 parts ...

Embodiment 1B～5B

[0197] [Examples 1B to 5B and Comparative Examples 1B to 2B]

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PUM

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Abstract

PROBLEM TO BE SOLVED: To provide an ink composition capable of obtaining an image having an excellent glossy feeling for various recording media, especially the recording media having gloss, showing less bronze phenomenon and having a good fixing property and abrasion resistance such as a gloss change, etc.

SOLUTION: This ink composition at least containing a coloring agent covered by a water insoluble polymer and resin particles is characterized in that the water insoluble polymer is a polymer obtained by polymerization using at least a polymerizable unsaturated monomer and a polymerization initiator by a solution polymerization method, the coloring agent covered with the water insoluble polymer is the coloring agent obtained by a phase inversion emulsification of dissolving the water insoluble polymer with an organic solvent, adding at least the coloring agent and water, mixing and then removing the organic solvent to disperse in an aqueous medium, and the resin particles are made of at least a polymer obtained by a polymerization by emulsion polymerization method using a cross-linking agent.

COPYRIGHT: (C)2007,JPO&INPIT

Description

technical field [0001] The present invention relates to an ink composition. More specifically, it relates to an ink composition suitable for an inkjet recording method. Background technique [0002] The inkjet recording method is a printing method in which small droplets of ink are flown and adhered to a recording medium such as paper to perform printing. With the innovative progress of inkjet recording technology in recent years, the inkjet recording method has been gradually used in high-definition image recording (printing) in the field of photographs or offset printing. High-quality recording is also required for recording media such as ordinary paper for inkjet recording or special paper for inkjet recording (matte series, glossy series), and recording media such as paper actually used for printing. [0003] As an ink used in inkjet recording, an ink composition including a color material serving as a colorant, water, a water-soluble organic compound, a surfactant, an...

Claims

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Application Information

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IPC IPC(8): C09D11/00B41J2/01B41M5/00C09C3/10C09D11/322C09D11/326C09D11/38
Inventor 金谷美春青山哲也半村昌弘
Owner SEIKO EPSON CORP
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