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Azo compound or salts thereof

A technology of azo compound and carbon number, applied in the field of azo compound or its salt, to achieve the effect of good chroma and high color concentration

Active Publication Date: 2012-07-04
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent document 1 discloses only λmax for the color characteristics of the dye, and does not describe any other characteristics.

Method used

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  • Azo compound or salts thereof
  • Azo compound or salts thereof
  • Azo compound or salts thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0073] After adding 300 parts of water to 30 parts of 2,2'-benzidine disulfonic acid (water content 30%) represented by formula (a-1), the pH was adjusted to 7-8 with 30% aqueous sodium hydroxide solution under ice cooling. The following operations were carried out under ice cooling. Add 12.6 parts of sodium nitrite and stir for 30 minutes. 38.1 parts of 35% hydrochloric acid were added a little at a time to form a brown solution and stirred for 2 hours. Dissolve 5.3 parts of sulfamic acid in 57.4 parts of water to form an aqueous solution, add the aqueous solution to the reaction solution, and stir to obtain a suspension containing diazonium salt.

[0074]

[0075] After adding 372 parts of water to 18.6 parts of N,N'-dimethylbarbituric acid represented by the formula (c-1), the pH was adjusted to 8-9 with a 30% aqueous sodium hydroxide solution under ice cooling.

[0076]

[0077] The following operations were performed under ice-cooling. The above-mentioned alkali ...

Embodiment 2

[0098] After adding 360 parts of water to 36 parts of 2,2'-benzidine disulfonic acid (water content 30%) represented by formula (a-1), the pH was adjusted to 7-8 with 30% aqueous sodium hydroxide solution under ice cooling. The following operations were carried out under ice cooling. Add 25.3 parts of sodium nitrite and stir for 30 minutes. 68.6 parts of 35% hydrochloric acid were added a little at a time to form a brown solution and stirred for 2 hours. Dissolve 20.7 parts of sulfamic acid in 206.6 parts of water to form an aqueous solution, add the aqueous solution to the reaction solution, and stir to obtain a suspension containing diazonium salt.

[0099] After adding 379.8 parts of water to 25.3 parts of thiobarbituric acid represented by the formula (c-2), the pH was adjusted to 8-9 with a 30% aqueous sodium hydroxide solution under ice cooling.

[0100]

[0101] The following operations were performed under ice-cooling. The above-mentioned alkaline aqueous solutio...

Embodiment 3

[0105] After adding 375 parts of water to 25 parts of 2,2'-benzidine disulfonic acid (water content 30%) represented by formula (a-1), the pH was adjusted to 7-8 with 30% aqueous sodium hydroxide solution under ice cooling. The following operations were carried out under ice cooling. Add 10.2 parts of sodium nitrite and stir for 30 minutes. 31.8 parts of 35% hydrochloric acid was added a little at a time to form a brown solution and stirred for 2 hours. Dissolve 4.8 parts of sulfamic acid in 47.8 parts of water to form an aqueous solution, add the aqueous solution to the reaction solution, and stir to obtain a suspension containing diazonium salt.

[0106] After adding 295 parts of water and 295 parts of acetone to 29.5 parts of N-(n-butyl)-N'-(4-methoxyphenyl) barbituric acid represented by formula (c-3), use 30 parts under ice cooling The pH was adjusted to 10 with aqueous sodium hydroxide solution.

[0107]

[0108] The following operations were performed under ice-co...

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Abstract

The present invention provides a novel azocompound which represents high color concentration and is represented by a formula (I) or a salt thereof. In the formula (I), Z1 and Z2 are independent respectively, represent oxygen atom or sulfur atom. R1 to R4 are independent respectively, represent oxygen atom, aliphatic saturated hydrocarbon group, alkoxy, aryl or aralkyl. R5 to R12 are independent respectively, and represent hydrogen atom, halogen atom, aliphatic saturated hydrocarbon group, alkoxy, carboxy group, sulfo group, sulfamoyl or N-substituted sulfamoyl.

Description

technical field [0001] The present invention relates to an azo compound or a salt thereof which can be used as a pigment. Background technique [0002] Pigments such as azo compounds have been used in various fields (such as fiber materials, liquid crystal display devices, etc.) to develop color by reflected light or transmitted light. (Patent Document 1, etc.). More specifically, Patent Document 1 discloses a dye in which two benzenesulfonic acids and one barbituric acid are linked by two azo groups. However, Patent Document 1 discloses only λmax for the color characteristics of the dye, and does not describe any other characteristics. [0003] Patent Document 1: European Patent Application Publication No. 0163113 Contents of the invention [0004] In recent years, users have increasingly strict requirements on the color density and hue of dyed products, and especially hope to develop new azo compounds or their salts with high concentration and good brilliance (chroma)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D239/62C09B33/12
CPCC07D239/60C07D239/62C07D401/08
Inventor 藤田拓麻
Owner SUMITOMO CHEM CO LTD
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