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Azo compound or salts thereof

An azo compound, R13 technology, applied in the direction of azo dyes, monoazo dyes, disazo dyes, etc.

Inactive Publication Date: 2013-09-11
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above-mentioned patent documents 1 to 3, there is no description about the color density of these pigments.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] After adding 100 parts of water to 10 parts of 2,2'-benzidine disulfonic acid (water content 30%) represented by formula (a-1), the pH was adjusted to 7-8 with 30% sodium hydroxide aqueous solution under ice cooling. The following operations were carried out under ice cooling. Add 5.6 parts of sodium nitrite and stir for 30 minutes. 14.8 parts of 35% hydrochloric acid was added a little at a time to form a brown solution and stirred for 2 hours. Dissolve 3.8 parts of sulfamic acid in 38.3 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.

[0070]

[0071] After adding 47.9 parts of water to 9.6 parts of 1-ethyl-3-carbamoyl-4-methyl-6-hydroxypyridin-2-one represented by formula (c-1), use 30% sodium hydroxide to The aqueous solution adjusts the pH to 8-9.

[0072]

[0073] The following operations were performed under ice-cooling. The above-mentioned alkaline...

Embodiment 2

[0080] After adding 156 parts of ethanol and 52 parts of water to 10.4 parts of 2,2'-bis(trifluoromethyl)benzidine represented by formula (a-2), the pH was adjusted to 7 with 30% aqueous sodium hydroxide solution under ice cooling. ~8. The following operations were carried out under ice cooling. Add 6.7 parts of sodium nitrite and stir for 30 minutes. 30.4 parts of 35% hydrochloric acid was added a little at a time to form a brown solution and stirred for 2 hours. Dissolve 3.1 parts of sulfamic acid in 31 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.

[0081]

[0082]After adding 15 parts of ethanol and 221 parts of water to 14.7 parts of 1-ethyl-3-carbamoyl-4-methyl-6-hydroxypyridin-2-one represented by formula (c-1), use 30% Sodium hydroxide aqueous solution adjusts the pH to 8-9.

[0083] The following operations were performed under ice-cooling. The above-men...

Embodiment 3

[0087] After adding 1000 parts of water to 100 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 56.1 parts of sodium nitrite and stir for 30 minutes. 148 parts of 35% hydrochloric acid were added a little at a time to form a brown solution and stirred for 2 hours. Dissolve 38.3 parts of sulfamic acid in 383 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.

[0088] After adding 761 parts of water to 76.1 parts of 1-ethyl-3-carbamoyl-4-methyl-6-hydroxypyridin-2-one represented by formula (c-2), use 30% sodium hydroxide under ice-cooling The aqueous solution adjusts the pH to 8-9.

[0089]

[0090] The following operations were performed under ice-cooling. The above-mentioned al...

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Abstract

The present invention provides novel azocompound which represents high color concentration and is represented by a formula (I) or the salt thereof. In the formula (I), R<1> to R<4> are independent and respectively represent hydrogen atom, C1-10 aliphatic saturated hydrocarbon or carboxy group, R<5> to R<12> are independent and respectively represent hydrogen atom, halogen atom, aliphatic saturated hydrocarbon group, alkoxy, carboxy group, sulfo group, sulfamoyl or N-substituted sulfamoyl, and at least one selected from R<13> and <14> represents hydrogen atom, halogen atom, aliphatic saturated hydrocarbon 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 (for example, fiber materials, liquid crystal display devices, etc.) to use reflected light or transmitted light to develop color, such as known azo compounds with pyridone rings (patent Documents 1 to 4, etc.). More specifically, Patent Documents 1 and 2 disclose a pigment in which a biphenyl skeleton (biphenylene) and two pyridone rings are linked by two azo groups, and Patent Document 3 discloses a phenylene and a biphenylene ring. A dye in which a phenyl group and a pyridone ring are linked by two azo groups, and Patent Document 4 discloses a dye in which a phenyl group and a pyridone ring are linked by an azo group. In the above-mentioned Patent Documents 1 to 3, there is no description about the color density of these dyes. On the other hand, the structu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D213/76C09B33/12
CPCC07D213/69C07D213/72C07D213/86C07D401/12C09B29/3626
Inventor 藤田拓麻
Owner SUMITOMO CHEM CO LTD
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