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an acid dye

A technology of acid dyes and compounds, applied in the direction of azo dyes, organic dyes, disazo dyes, etc., can solve the problems of poor light fastness and light fastness reduction of dyes

Inactive Publication Date: 2016-12-14
PENGZE XINGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, current research proves that the photodegradation rate has a good linear relationship with the Hammett constant of the substituent. From the Hammett equation, it can be seen that the electron-donating group is introduced into the azo-based system of the dye molecule, due to the increase of the azo bond N=N The electron cloud density makes the Ar-N bond easily oxidized by light, resulting in a decrease in light fastness
Therefore, the presence of electron-donating group hydroxyl groups makes the dyes less light-fast

Method used

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Experimental program
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preparation Embodiment 1

[0055] Add 15.0 parts of 4-aminoacetanilide to a mixture of 50 parts of ice and 25 parts of hydrochloric acid with a strength of about 30% by volume, and stir for about 30 minutes. At 0-5[deg.] C., 17.3 parts of a 40% by volume sodium nitrite solution were added dropwise within 30 minutes. The temperature was maintained at 0-5°C by adding ice during the addition. After the diazotization is complete, the excess sodium nitrite is destroyed with sulfamic acid.

[0056] 29.1 parts of 3-[(ethylphenylamino)methyl]benzenesulfonic acid were suspended in 200 parts of water. The pH of the suspension was adjusted to 7-7.5 with sodium carbonate. Under vigorous stirring, the diazo compound suspension was added within 30 minutes. During the addition, the pH was maintained at around 7 by metering in sodium carbonate solution.

[0057] After the coupling reaction is complete, 50 parts of an aqueous sodium hydroxide solution having a strength of about 30% by volume is added and the reactio...

preparation Embodiment 2-8

[0063] The following table contains the dyes prepared in a similar manner to that described in Example 1 by using the corresponding starting materials. These dyes wool (especially polyamide) blue with very good light and wet fastnesses. It can be seen from the data in the table that the compounds disclosed in the present invention have good light fastness, wet fastness and rubbing fastness. Compared with the compound disclosed in CN101479348A, it has significant improvement in light fastness and wet fastness.

[0064]

[0065]

[0066] Test method for light (sunlight) fastness: GB / T 8427-1998, 3% owf; test method for washing fastness: ISO1OS-C2S; test method for water fastness: GB / T 428-1978; perspiration fastness test Method: ISO 105 / E04-1994; Test method for rubbing fastness: GB 3920.

[0067] The comparative examples in the table are the compounds disclosed in CN 101479348A. Wherein, R1, R2, R6 in the comparative example in the table and the compound of the present...

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Abstract

The invention discloses an acid dye, its preparation method and its application in dyeing and printing. This acid dye can be used alone for dyeing or printing, and has excellent dyeing fastness, level dyeing and light fastness. At the same time, this acid dye has good compatibility and can also be used together with other acid dyes of the same kind as a component in combined shade dyeing or printing compositions.

Description

technical field [0001] The present invention relates to a kind of dye and its preparation method and use, specifically, the present invention relates to an acid dye, its preparation method and its use in dyeing or printing. Background technique [0002] Acid dyes usually have sulfonic acid groups or carboxyl groups and can be dyed in acidic, weakly acidic or neutral dye solutions. Acid dyes have a complete spectrum and bright colors, so they are widely used in the dyeing and printing of wool, silk and other protein fibers and polyamide fibers. In addition, it is also used in dyeing or coloring of vinylon, leather, paper, wood, food and preparation of ink, etc. [0003] In recent years, with the rapid development of my country's dye industry, my country has become the country with the largest output of acid dyes in the world, and the varieties of acid dyes are also increasing, mainly including: monoazo dyes, disazo dyes, anthraquinone dyes, triaryl dyes Methane-type dyes, et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B35/04C09B35/037D06P1/39D06P3/16D06P3/06D06P3/24D06P3/32D06P3/60C09D11/328
Inventor 陈丽专
Owner PENGZE XINGDA CHEM