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Inkjet pigment ink

A pigment and inkjet technology, applied in the field of ink sets, printed matter, and inkjet inks, can solve the problems of difficulty in making inks with dispersion stability, difficulty in ensuring dispersion stability, etc., and achieve the effects of excellent weather resistance and excellent printability.

Active Publication Date: 2014-01-08
TOYO INK SC HLDG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, C.I. Pigment Red 122 has more pigments with a hydrophilic surface than other colors, so it has been difficult to produce an ink with excellent dispersion stability, especially when using a solvent with high permeability. It is even more difficult to ensure dispersion stability

Method used

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Examples

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Embodiment

[0133] Hereinafter, the present invention will be described more concretely with reference to the embodiments, examples and comparative examples. In addition, in the following description, when using "part" and "%", it is a basis of weight unless otherwise indicated.

[0134]

manufacture example 1

[0135] (Production Example 1) Synthesis of Dispersion Resin 1

[0136]93.4 parts of triethylene glycol monomethyl ether were added to a reaction container equipped with a gas introduction tube, a thermometer, a condenser, and a stirrer, and nitrogen gas was used to replace it. The inside of the reaction vessel was heated to 110°C, and a mixture of 35.0 parts of lauryl methacrylate, 35.0 parts of styrene, 30.0 parts of acrylic acid, and 6.0 parts of V-601 (manufactured by Wako Pure Chemical Industries) was added dropwise over 2 hours to perform polymerization reaction. After completion of the dropwise addition, 0.6 parts of V-601 (manufactured by Wako Pure Chemical Industries, Ltd.) was added after further reacting at 110° C. for 1 hour, and a solution of dispersion resin 1 was obtained by further reacting at 110° C. for 1 hour. The weight-average molecular weight of Dispersion Resin 1 was about 16,000.

[0137] Furthermore, after cooling to room temperature, 37.1 parts of di...

manufacture example 2

[0138] (Production Example 2) Synthesis of Dispersion Resin 2

[0139] 93.4 parts of butanol was added to a reaction container equipped with a gas introduction tube, a thermometer, a condenser, and a stirrer, and nitrogen gas was used to replace it. The inside of the reaction vessel was heated to 110°C, and a mixture of 35.0 parts of lauryl methacrylate, 35.0 parts of styrene, 30.0 parts of acrylic acid, and 6.0 parts of V-601 (manufactured by Wako Pure Chemical Industries) was added dropwise over 2 hours to perform polymerization reaction. After completion of the dropwise addition, 0.6 parts of V-601 (manufactured by Wako Pure Chemical Industries, Ltd.) was added after further reacting at 110° C. for 1 hour, and a solution of dispersion resin 2 was obtained by further performing reaction at 110° C. for 1 hour. The weight average molecular weight of dispersion resin 2 was about 16,000.

[0140] Furthermore, after cooling to room temperature, 37.1 parts of dimethylaminoethano...

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Abstract

Provided is an inkjet pigment ink which contains a pigment that is selected from the group consisting of C.L. Pigment Yellow 74 having a transmittance of 70% or more, C.I. Pigment Red 269 having a transmittance of 70% or more, C.I. Pigment Red 122 having a transmittance of less than 70% and C.I. Pigment Yellow 150; a water-soluble solvent that is selected from the group consisting of glycol ethers and diols; water; and a pigment dispersing resin that is a copolymer which contains a monomer A, a monomer B and a monomer C as unit components. The monomer A is an alkyl (meth)acrylate ester; the monomer B is styrene, ±-methyl styrene or benzyl (meth)acrylate; and the monomer C is (meth)acrylic acid.

Description

technical field [0001] The present invention relates to an inkjet ink, an ink set, and a printed matter. Background technique [0002] The inkjet recording method is a recording method in which ink droplets are directly ejected from very fine nozzles onto a recording member and adhered to obtain characters and images. This method not only has the advantages of low noise and good operability of the device, but also has the advantages of easy colorization and the use of plain paper as a recording member, so it is widely used as an output machine in offices and homes. On the other hand, in industrial applications, it is also expected to be used as an output machine for digital printing by improving inkjet technology, and the development of water-based pigment inks is required in consideration of the environmental aspects and the durability of printed matter. [0003] In water-based pigment inks, since pigments are insoluble in water, dispersion resins are used to stabilize dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/322C09D11/326B41J2/01B41M5/00
CPCC09D11/326C09D11/106C09D11/322B41J2/01B41M5/00C09D11/30C09D11/40
Inventor 重森一范小久保奈津子三上让司宇都木正贵市村泰孝鹫尾智史高桥征寿依田纯杉原真广
Owner TOYO INK SC HLDG CO LTD
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