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A kind of weak acid purple dye and preparation method thereof

A dye and fuchsia technology, applied in the field of weak acid fuchsia dye and its preparation, can solve the problems of high wool affinity, complex molecular structure, poor leveling degree, etc., and achieve good color fastness, low dye residue and small color change Effect

Active Publication Date: 2016-12-28
金华恒利康化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molecular structure is relatively complex, and it has a strong affinity for wool. It can dye silk, nylon, leather, wool, ink, paper, wood, stone and other materials in a weakly acidic medium without damaging the material. The shade is deep and firm. The degree has been improved, but the leveling degree is poor

Method used

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  • A kind of weak acid purple dye and preparation method thereof
  • A kind of weak acid purple dye and preparation method thereof
  • A kind of weak acid purple dye and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Diazotization of 2-amino-2’-methyl-diphenyl ether

[0025] 3.1 g (0.0154 mol) of 2-amino-2'-methyl-diphenyl ether and 30% aqueous solution made of 1.1 g of sodium nitrite were added dropwise to the solution of 5.6 g of 30% hydrochloric acid, 10 ml of water and appropriate amount of ice During the dropping process, the temperature is controlled at 10°C, and the sodium nitrite is slightly excessive (the test solution of the starch potassium iodide test paper is blue). 2-Amino-2'-methyl-diphenyl ether diazonium salt solution.

[0026] 2) Coupling

[0027] Add a thin stream of 2-amino-2'-methyl-diphenyl ether diazonium salt solution to 8.02 g of N-p-toluenesulfonyl H acid (0.016 mol) in 20% aqueous solution while controlling the reaction with 20% soda ash solution pH = 7-8, after feeding is completed, keep pH = 7-8 and continue to stir for 5 hours, the reaction temperature is 10°C, and the end point is detected by the penetrating ring method. There is a slight excess ...

Embodiment 2

[0031] In Example 1, the diazotization of 2-amino-2'-methyl-diphenyl ether was adjusted to cool to 5°C and slowly add 30% sodium nitrite solution, and other conditions were the same as in Example 1 to obtain the original dye 18.1 g. The product shade is approximate.

Embodiment 3

[0033] In embodiment 1, the sodium nitrite of 2-amino-2'-methyl-diphenyl ether diazotization is used instead 1.09g, and other conditions are with embodiment 1, obtains former dyestuff 17.9 g. The product shade is approximate.

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Abstract

The invention discloses a weak acid violet-red dye and a preparation method thereof, which belong to the filed of fine chemical engineering, wherein the structural formula of the weak acid violet-red dye is that: (img file='dest_path_image002. TIF' wi='362' he='147' / ), the special preparation steps: 1) 2-amino-2 (b) (a / b)-methyl-diphenyl ethers, hydrochloric acids and sodium nitrites react to generate 2-amino-2 (b) (a / b)-methyl-diphenyl ether diazonium salt; 2) the 2-amino-2 (b) (a / b)-methyl-diphenyl ether diazonium salt which is generated in the step 1) is coupled with N-paratoluensulfonyl H acids in a alkaline condition, thereby obtaining a structural formula (I) compound solution; and 3) the structural formula (I) compound solution is salted out, filtered, dried, smashed and commercialized to obtain the weak acid violet-red dye. The weak acid violet-red dye has the advantages that the weak acid violet-red dye is excellent in reproducibility, short in dyeing time and excellent color matching property between dyes, can be mixed with other dyestuffs used for wool, and does not damage fabrics and the like. Secondly, the weak acid violet-red dye is excellent in color fastness, excellent leveling property and extremely high in light fastness, and is an environmentally friendly high-grade dye.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a weak acid purple dye and a preparation method thereof. Background technique [0002] Acid series synthetic dyes are widely used, not only for dyeing silk, nylon, leather, wool, ink, paper, wood, stone and other materials, but also for maritime rescue, pipeline leakage tracking and other fields. R&D and production of high-grade acid dyes is one of the important directions for the development of my country's printing and dyeing industry. [0003] In acid dyes, weak acid dyes can be generated by increasing the molecular weight, introducing groups such as aryl sulfone groups, or introducing long carbon chains. The molecular structure is relatively complex, and it has a strong affinity for wool. It can dye silk, nylon, leather, wool, ink, paper, wood, stone and other materials in a weakly acidic medium without damaging the material. The shade is deep and firm. The degree ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B29/16C09B67/24D06P1/39
Inventor 刘春生楼益义吴平
Owner 金华恒利康化工有限公司