Water-base black ink composition and colored material

A technology of black ink and composition, applied in the direction of ink, other coupling dyes, copying/marking methods, etc., can solve the problem of not being able to provide products that fully meet market requirements

Active Publication Date: 2006-04-05
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although conjugated azo compounds have been proposed in, for example, JP-A-8-302221, JP-A-9-12910, and Patent No. 2565531, it has not yet been possible to provide products that fully meet market requirements.

Method used

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  • Water-base black ink composition and colored material
  • Water-base black ink composition and colored material
  • Water-base black ink composition and colored material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0255] 20.42 parts of compounds of the following formula (111) were dissolved in 200 parts of water while adjusting the pH to 5.5 to 8.0 with sodium hydroxide. Next, the temperature of the solution was adjusted to 5 to 10° C., and 52.2 parts of 35% hydrochloric acid and 28.0 parts of 40% sodium nitrite aqueous solution were added to carry out diazotization.

[0256]

[0257] This diazo compound suspension was dropped at 15 to 30° C. into an alkaline aqueous solution containing 24.7 parts of 7-amino-1-hydroxynaphthalene-3-sulfonic acid in 200 parts of water. The pH of the solution was maintained at 8.5 to 9.5 by sodium carbonate during the instillation. After the dropwise addition, the mixture was stirred at pH 8.5 to 9.5 at 15 to 30° C. for 3 hours to complete the coupling reaction and obtain a reaction solution containing the compound of the following formula (112). Then, sodium chloride was added and salted out, followed by filtration and drying to obtain 26.3 parts of m...

Embodiment 1-2

[0267] In addition to using 42.0 parts of 7-amino-1-hydroxynaphthalene-3,6-disulfonic acid instead of 24.7 parts of 7-amino-1-hydroxynaphthalene-3-sulfonic acid in Example 1-1, through the same method as in Example 1- 1 In the same manner, 20.2 parts of an azo compound of the following formula (121) (compound No. 2-2 in Table 3) were obtained. The maximum absorption wavelength of this compound in water is 657nm, and the solubility in water is above 100g / l.

[0268]

Embodiment 1-3

[0270] Except using 17.86 parts of 1-amino-2-benzenesulfonic acid instead of 20.42 parts of the compound of formula (111) in Example 1-1, the azo compound of the following formula (131) was obtained by the same method as in Example 1-1 Compound (compound No.2-3 in Table 3) 18.2 parts. The maximum absorption wavelength of this compound in water is 650nm, and the solubility in water is more than 100g / l.

[0271]

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Abstract

The present invention relates to a water-based black ink composition comprising a water-soluble black dye (A) exhibiting ozone fastness and a condensate compound (B) of 4,4'-dinitrostilbene-2,2'-disulfonic acid and aminobenzenes or a reduction product (C) thereof. Said ink composition is suitable for use in ink-jet recording, and realizes neutral hue and black color of high printing density. Further, a printed matter obtained is excellent in ozone gas fastness, light fastness, moisture fastness and color rendering properties. Still further, storage stability as a recording liquid is excellent.

Description

technical field [0001] The present invention relates to an aqueous black ink composition for inkjet printers and a colored body formed therefrom. Background technique [0002] Among the various color recording methods, the method of recording by an inkjet printer, which is one of the representative methods, is to record by generating ink droplets and attaching them to various recording materials (paper, film, cloth, etc.). of. Since the recording head is not in contact with the recording material, this method produces less sound and is quieter, and because it is easy to miniaturize and increase speed, it has been rapidly popularized in recent years, and great development is expected in the future. Conventionally, water-based inks obtained by dissolving water-soluble dyes in aqueous media have been used as inks for fountain pens, felt-tip pens, and inks for inkjet recording. Ink clogging, water-soluble organic solvents can generally be added. Therefore, for these conventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/00C09B33/28B41J2/01B41M5/00C09D11/328C09D11/38
Inventor 大野博昭山口徹松井贵彦米田孝川井田芳明白崎康夫长崎和信
Owner NIPPON KAYAKU CO LTD
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