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Ink composition, inkjet recording method, and colored material

一种油墨组合物、化合物的技术，应用在复制/标记方法、油墨、化学仪器和方法等方向，能够解决不是中性黑色印刷品、无法充分满足图像牢固度的市场要求、未公开高牢固度和发色性油墨组合物等问题，达到优良耐臭氧性、印字浓度高的效果

Active Publication Date: 2013-05-08
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if these ink compositions are used as monochrome inks, not only are they not printing neutral black prints, but they also cannot adequately meet market demands for higher image fastness
In addition, in Patent Documents 4 and 5, a method for obtaining a black ink composition is disclosed, but an ink composition satisfying high fastness and color development required by the market is not disclosed.

Method used

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  • Ink composition, inkjet recording method, and colored material
  • Ink composition, inkjet recording method, and colored material
  • Ink composition, inkjet recording method, and colored material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0319] Hereinafter, the present invention will be described more specifically by way of examples, but the present invention is not limited by the following examples.

[0320] In the examples, unless otherwise specified, the places where "parts" and "%" are written are quality standards. In addition, various operations such as synthesis reaction and crystallization are carried out under stirring. In one synthesis reaction, when the desired amount of the target compound is not obtained, the reaction is repeated until the desired amount is obtained.

[0321] In addition, in the following formulas, functional groups such as sulfonic acid group and carboxyl group are represented in the form of free acids for convenience.

[0322] In addition, any of the pH value and the reaction temperature described in the examples represents the measured value in the reaction system.

[0323] In addition, the maximum absorption wavelength (λmax) of the synthesized compound was measured in an aq...

Synthetic example 1

[0328] (Process 1)

[0329] Slowly add 5.0 parts of 2-amino-6-methoxybenzothiazole to 16 parts of 15% oleum at 15-25°C. After addition, it stirred at this temperature for 2 hours, and then dripped into 60 parts of ice water over about 10 minutes. The precipitated crystals were filtered and extracted, and dried to obtain 6.4 parts of a compound represented by the following formula (27).

[0330] 【Chemical 27】

[0331]

[0332] (Process 2)

[0333] Make 3.2 parts of the compound represented by the formula (27) obtained by the above-mentioned procedure (1) suspended in 20 parts of 50% sulfuric acid, and drop 4.7 parts of 40% sulfuric acid in about 10 minutes under stirring at 5-10°C. Nitrosyl sulfuric acid to obtain a diazonium suspension.

[0334] On the other hand, 2.9 parts of the compound represented by the above formula (28), 0.4 parts of sulfamic acid were added to 30 parts of water, and sodium hydroxide was added to adjust the pH to 5.0 to 5.5 to obtain an aqueous sol...

Synthetic example 2

[0366] In the synthesis of the above formula (32), as a raw material, 12.7 parts of 3,5-disulfonic acid aniline can be replaced by using 19.2 parts of 2-aminonaphthalene-4,6,8 trisulfonic acid to obtain the following formula (34 ) was used as a raw material to carry out the above Synthesis Example 1 (Step 5) to obtain a compound (λmax: 607.0 nm) represented by the following formula (35). In addition, this compound is a mixture of the compound represented by No. 32 described in Table 5 and the compound represented by No. 33 described in Table 6.

[0367] 【Chemical 34】

[0368]

[0369] 【Chemical 35】

[0370]

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Abstract

Disclosed is an aqueous black ink composition which enables the formation of an excellent black recorded image having extremely high ozone gas resistance and a neutral and achromatic color. The ink composition comprises: a dye (I) which comprises at least one compound represented by specific formula (1) or at least one tautomer or salt of the compound; a dye (II) which comprises at least one compound represented by specific formula (3) or at least one tautomer or salt of the compound; and a dye (III) which comprises at least one compound represented by specific formula (4) or at least one tautomer or salt of the compound. In formula (1), R1 and R2 independently represent a hydrogen atom, a sulfo group or the like; R3 and R4 independently represent a halogen atom, a sulfo group or the like; and n represents 0 or 1. In formula (3), m represents 0 or 1; R101 to R103 independently represent a hydrogen atom, a sulfo group or a C1-C4 alkoxy group; and a group D represents a phenyl or naphthyl group substituted by 1 to 3 sulfo groups. In formula (4), R201 to R204 independently represent a hydrogen atom, or a C1-C4 alkoxy group substituted by a sulfo group.

Description

technical field [0001] The present invention relates to an ink composition containing specified three kinds of pigments, an inkjet recording method using the ink composition, and a colored body colored by the ink composition. Background technique [0002] Among various color recording methods, the recording method using inkjet printing, which is one of the representative methods, is to generate small ink droplets and make them adhere to various recording materials (paper, sheet, cloth, etc.) method of recording. With this method, there is no direct contact between the recording head and the material to be recorded, and therefore, the sound generated is small and quiet. Moreover, because it is easy to achieve miniaturization and high speed, this method has spread rapidly in recent years, and it is expected that there will be more room for development in the future. [0003] Conventionally, as inks for fountain pens, felt-tip pens, etc., and inks for inkjet recording, water-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/00B41J2/01B41M5/00C09B31/28C09B35/58C09B43/16
CPCC09D11/328C09B31/28B41M5/5218B41M5/00C09D11/18B41J2/01C09D11/17C09B43/16C09B31/30C09B35/56C09B67/0055C09B35/58C09D11/00Y10T428/24802
Inventor 川口彬松井贵彦吉本隆志大岛贤司
Owner NIPPON KAYAKU CO LTD
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