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Preparation method of bright yellow disperse dye

A disperse dye, bright yellow technology, applied in the field of preparation of bright yellow disperse dyes, can solve the problems of poor alkali resistance, poor oxidation resistance and stability

Active Publication Date: 2015-06-17
SHANGHAI ANOKY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a kind of preparation method of bright yellow disperse dye that can be dyed by alkali in order to overcome the defects of poor alkali resistance and poor oxidation stability of existing disperse dyes

Method used

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  • Preparation method of bright yellow disperse dye
  • Preparation method of bright yellow disperse dye
  • Preparation method of bright yellow disperse dye

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0122] Preparation of Compound A1: (1) Add 150 g of water and 13.7 g of N-(2,4-dinitro)phenyl-1,3-diaminobenzene into a 250 mL three-neck flask, stir evenly at room temperature for half an hour, then add mass The percentage concentration is 20 grams of hydrochloric acid of 36%, continue to stir for 1.5 hours, add ice and cool to 0-5 ℃, dropwise add 18.6 grams of sodium nitrite solution with a mass fraction of 20%, then continue to react at 0-5 ℃ for 3 hours, Add 0.5 g of sulfamic acid, and test colorless with starch potassium iodide test paper to obtain diazonium salt to be coupled.

[0123] (2) Add 200 grams of water, 7 grams of sodium hydroxide with a mass fraction of 30%, 8.7 grams of sodium carbonate, and 4.8 grams of phenol into a 1000mL beaker. After stirring for half an hour, keep at 0-10°C and add step (1) The obtained diazonium salt was reacted for 3 hours while keeping the pH value at 8-9, heated to 65-70° C. for 2 hours, and filtered to obtain 18 grams of intermedia...

Embodiment 1

[0134] 10 grams of former dyes shown in formula A1, 20 grams of former dyes shown in formula B4, 20 grams of former dyes shown in formula C3, dispersant MF60 grams, sodium lignosulfonate 15 grams, water 153 grams together sand Disperse in a mill, and then spray dry to obtain the light yellow dye mixture of the present invention.

Embodiment 2～30

[0136] According to the preparation method of Example 1, the compounds represented by formulas A, B, and C were ground, dispersed, and spray-dried according to the data shown in Table 1 below.

[0137] Table 1

[0138]

[0139]

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PUM

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Abstract

The invention discloses a preparation method of a bright yellow disperse dye. The preparation method comprises the following steps of carrying out a diazotization coupling reaction of a compound IV and a compound V under the action of sodium nitrite, wherein R3 is C1-C4 straight-chain or branched-chain alkyl, -OCH3 or -OC2H5, R4 and R5 are independently H, halogen or nitro but are not simultaneously -H or nitro, and R6 and R7 are independently methyl, ethyl, -C2H4CN, -C2H4OCH3, -C2H4OC2H5 or benzyl. The disperse dye obtained by the preparation method shows a bright yellow color, can be used individually, also can be in combination use with alkali-resisting disperse dyes having other colors, and has excellent alkali resistance and hydrogen peroxide oxidization resistance stability.

Description

technical field [0001] The invention relates to a preparation method of light yellow disperse dye. Background technique [0002] Polyester fibers and their blended fabrics have important applications in current high-grade fabrics, and the applicable dyes are disperse dyes. When disperse dyes are used in the dyeing of polyester fiber products, acidic dyeing baths are generally used for dyeing, but acid dyeing is prone to disadvantages such as staining spots, color spots, and dyeing flowers caused by oligomer contamination. The basic dyeing process of disperse dyes can effectively remove the oligomers produced in the dyeing process, which is expected to shorten the production process, and has the characteristics of low consumption, high efficiency, energy saving and time saving. In recent years, the pressure of energy saving, emission reduction and cost has prompted printing and dyeing enterprises and dye auxiliaries manufacturers to work together to develop a variety of alka...

Claims

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Application Information

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IPC IPC(8): C09B29/085C09B43/28C09B67/22C09B67/38D06P1/18D06P1/19D06P3/54D06P3/85
Inventor 赵敏燕美芳
Owner SHANGHAI ANOKY GRP
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