Pigment dispersion and ink composition and ink set both containing the same

A technology for pigment dispersion liquid and ink composition, which is applied in the fields of pigment dispersion liquid, ink composition using pigment dispersion liquid and ink set, can solve the problem of insufficient glossiness of color images, insufficient storage stability of ink composition, and inability to achieve high Image quality and other issues

Inactive Publication Date: 2005-11-16
SEIKO EPSON CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the conventional pigment dispersion liquids, when the pigment dispersion liquids are used to prepare ink compositions, the glossiness of color images formed using the ink compositions, the anti-copper floating color and the ink cannot be achieved at the same time. Storage stability of the composition
That is, for ink compositions prepared from pigment dispersions to date, the glossiness of color images is insufficient, and due to the particle size distribution of output pigments, the recording surface takes on a bronze color depending on the viewing angle, i.e., So-called "bronze floating" phenomenon occurs, high image quality cannot be achieved, and the storage stability of the ink composition is insufficient

Method used

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  • Pigment dispersion and ink composition and ink set both containing the same
  • Pigment dispersion and ink composition and ink set both containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach A

[0019] (pigment dispersion)

[0020] The pigment dispersion of Embodiment A of the present invention includes at least a pigment, an aqueous medium, a copolymer resin of a hydrophobic monomer and a hydrophilic monomer, and a polyurethane resin, wherein the weight ratio of the above-mentioned copolymer resin to the above-mentioned polyurethane resin (the former / The latter) is 1 / 2 to 2 / 1.

[0021] Thus, the pigment dispersion liquid of Embodiment A of the present invention, by making it contain two specific resins in a specific weight ratio, can be prepared to have excellent storage stability and to be used for forming pigments having good gloss and preventing copper flooding. In addition to the glossiness of recorded images and the prevention of copper flooding, it also achieves output stability, anti-clogging properties, color stability, and high image quality comparable to silver salts. The pigment dispersion liquid according to the embodiment A of the present invention can...

Embodiment approach B

[0115] (pigment dispersion)

[0116] The pigment dispersion according to embodiment B of the present invention at least includes a pigment, an aqueous medium, a copolymer resin of a hydrophobic monomer and a hydrophilic monomer, and a polyurethane resin, wherein the content of the above-mentioned copolymer resin is 10 to 50 parts by weight / 100 parts by weight The above-mentioned pigment, the content of the above-mentioned polyurethane resin is 10-40 parts by weight / 100 parts by weight of the above-mentioned pigment.

[0117] In this way, the pigment dispersion liquid of Embodiment B of the present invention contains two specific resins in a specific content, so that an ink composition having excellent storage stability for forming an image having good gloss and preventing copper flooding can be prepared, In addition to recording image gloss and anti-copper floating color, it also realizes output stability, anti-clogging performance, color stability, and high image quality comp...

Embodiment approach C

[0139] (pigment dispersion)

[0140] The pigment dispersion according to Embodiment C of the present invention at least includes: a pigment, an aqueous medium, a copolymer resin of a hydrophobic monomer and a hydrophilic monomer, and a polyurethane resin, wherein the acid value of the copolymer resin is 50-320.

[0141] In this way, the pigment dispersion liquid of Embodiment C of the present invention contains two specific resins one of which has an acid value in a specific range, thereby making it possible to prepare an image having excellent It is an ink composition with storage stability, and in addition to the glossiness of recorded images and copper flooding resistance, it can also achieve output stability, anti-clogging properties, color stability, and high image quality comparable to silver salts. The pigment dispersion liquid according to the embodiment C of the present invention is as described above, and can realize the glossiness of the recorded image, the anti-cop...

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Abstract

It is an object of the present invention to provide a pigment dispersion, an ink composition, and an ink set, enabling excellent glossiness, bronzing prevention, and ink composition storage stability to be realized. The present invention provides a pigment dispersion characterized by comprising at least a pigment, an aqueous medium, a copolymer resin between a hydrophobic monomer and a hydrophilic monomer, and a urethane resin, and also an ink composition characterized by containing at least the pigment dispersion and an aqueous medium, and an ink set characterized by comprising at least the ink composition.

Description

technical field [0001] The present invention relates to a pigment dispersion capable of realizing good glossiness of recorded images, anti-copper floating color and storage stability of the ink composition, an ink composition containing the pigment dispersion, and an ink composition containing the ink composition Ink set of the invention, especially relates to a kind of pigment dispersion liquid capable of realizing good glossiness of color image, anti-copper floating color and storage stability of ink composition, and the ink composition containing said pigment dispersion liquid and containing said Ink set of ink composition. Background technique [0002] Heretofore, pigments have been widely used as colorants for inks for inkjet recording, inks for writing implements, and the like because of their excellent fastness to water, light, and the like. Since the pigment is insoluble in water, when it is used in an ink composition, it is important for the pigment to be stably di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/10
Inventor 片冈修一石本文治水谷启冈本直树宫崎由昭安田益姿弥白神智行
Owner SEIKO EPSON CORP
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