Azo compound, ink composition, recording method, and colored object

An azo compound and azo-based technology, used in the fields of azo compounds, ink compositions, recording and coloring bodies, can solve the problems of insufficient ozone resistance and market requirements, and achieve stable ejection. Excellent properties, excellent storage stability, excellent water solubility

Inactive Publication Date: 2008-08-20
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ozone resistance of these compounds still cannot fully meet the requirements of the market
In addition, although the compound (pigment) for black ink is also described in Patent Documents 2 and 3, it is H acid (4-amino-5-naphthol-2,7-disulfonic acid) or K acid (4-amino -5-naphthol-1,7-disulfonic acid) amino terminal with gamma acid (6-amino-4-naphthol-2-sulfonic acid) or J acid (7-amino-4-naphthol-2 - sulfonic acid) residue azo-bonded, trisazo compounds with azo-bonded phenyl or naphthyl derivatives at the hydroxyl end, but still fail to fully meet market requirements, especially for ozone resistance

Method used

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  • Azo compound, ink composition, recording method, and colored object
  • Azo compound, ink composition, recording method, and colored object
  • Azo compound, ink composition, recording method, and colored object

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] (1) Take 6.4 parts of 2-amino-5-naphthol-1,7-disulfonic acid and 4.1 parts of p-toluenesulfonyl chloride in water, react for 1 hour at a pH of 8.0 to 8.5 at a temperature of 70°C, Adjust the reaction solution to be acidic for salting out, and filter the precipitate to obtain the compound of formula (12). 8.8 parts of the obtained compound were dissolved in 90 parts of water, and dissolved while adjusting the pH to 6.0 to 8.0 with sodium carbonate. After adding 6.8 parts of 35% hydrochloric acid to the obtained solution, after cooling to 0 to 5°C, 3.6 parts of 40% sodium nitrite aqueous solution were added to diazotize the compound of formula (12).

[0120]

[0121] To this diazo suspension, add a solution obtained by suspending 5.8 parts of 4-amino-5-hydroxynaphthalene-1,7-disulfonic acid in 60 parts of water, and then place the resulting suspension at 10 to 20°C It was stirred for 4 hours while maintaining its pH at 2.4 to 2.8 with sodium carbonate. Then, adjust t...

Embodiment 2

[0133] (A) Preparation of ink

[0134] The black ink composition of the present invention was prepared by mixing the following ingredients, and then filtered through a 0.45 μm membrane filter to remove impurities therein.

[0135] In addition, ion-exchanged water was used for water. When preparing the ink, adjust the pH of the ink to 7 to 9 with ammonium hydroxide, and then add ion-exchanged water to make the total amount 100 parts.

[0136] table 3

[0137] 5.0 parts of the compound obtained in the above-mentioned Example 1

[0138] Glycerol 5.0 parts

[0139] Urea 5.0 parts

[0140] N-methyl-2-pyrrolidone 4.0 parts

[0141] 3.0 parts of isopropanol

[0142] Butyl Carbitol 2.0 parts

[0143] Surfactant (Surfynol 105 manufactured by Nissin Chemical Co., Ltd.) 0.1 part

[0144] Water+ammonium hydroxide 75.9 parts

[0145] Total 100.0 copies

[0146] The compounds prepared in the above-mentioned Example 1 in Table 3 represent the compounds of formula (17). The water-bas...

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Abstract

An azo compound represented by the following formula (1): (wherein R<1> and R<2> each independently represents hydrogen, halogeno, cyano, carboxy, sulfo, sulfamoyl, N-alkylaminosulfonyl, N-phenylaminosulfonyl, etc.; R<3>, R<4>, R<5>, R<6>, R<7>, and R<8> each independently represents hydrogen, halogeno, hydroxy, cyano, carboxy, sulfo, sulfamoyl, N-alkylaminosulfonyl, N-phenylaminosulfonyl, etc.; and n is 0 or 1) or a salt of the compound. Also provided are an ink composition containing the compound or salt, recording method and colored object. The ink composition containing the azo compound has excellent long-term storage stability and gives a print excellent in light resistance and ozone resistance.

Description

technical field [0001] The present invention relates to a novel azo compound or its salt, an ink composition containing the azo compound or its salt, and a colored body using the ink composition. Background technique [0002] The recording method using an inkjet printer is a representative method among various color recording methods, and ink droplets are generated and attached to various recording materials (paper, film, cloth, etc.) for recording. Since the recording head is not in direct contact with the recording material, this method is quiet and does not emit sound, and has the advantages of easy miniaturization and high speed, so it has been rapidly popularized in recent years, and it is expected to develop better in the future. In the past, inks used for pens, felt pens, etc., and inks for inkjet recording used water-based inks in which water-soluble dyes were dissolved in water-based media. In order to prevent these water-based inks from clogging the pen tip or inkj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B33/26B41J2/01B41M5/00C09D11/00
CPCC09B35/58C09D11/328C09D11/32Y10T428/24802B41J2/01B41M5/00C09B33/26
Inventor 松井贵彦森田陵太郎出岛祯之
Owner NIPPON KAYAKU CO LTD
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